* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
TASK 72-53-40-200-801
1 . General.
A.This procedure gives instructions to do an inspection of the HPT rotor stage 1 disk (stage 1 disk) (150A1).
B.Carefully examine the areas that follow, because they are the most important. Refer to Figure 810, Figure 811, Figure 812, Figure 813, and Figure 814.
•
Dovetail serrations, slot bottoms, pressure faces, and minimum necks
•
Rabbets
•
Disk bore
•
No. 4 bearing journal surface
•
Zone FA (internal and external surfaces)
•
Boltholes
•
Bayonet pockets
•
Splines
•
Radii.
2 . Tools, Equipment, and Materials.
NOTE:
You can use equivalent alternatives for tools, equipment, and consumable materials.
A.Tools and Equipment.
(1)Special Tools. None.
(2)Standard Tools and Equipment.
 
Description
Manufacturer
 
Eddy Current Inspection Kit GE-FQAP-428
GE Aircraft Engines, QTC Attention: Brenda Tenley One Neumann Way, MD: Q8 Cincinnati, OH 45215 Phone: (513) 552-4701 Fax: (513) 552-4892 Email: brenda.tenley@ae.ge.com
 
Eddy Current Inspection Kit GE-FQAP-584
GE Aviation, QTC Attention: Brenda Tenley One Neumann Way, MD: Q8 Cincinnati, OH 45215 Phone: (513) 552-4701 Fax: (513) 552-4892 Email: brenda.tenley@ge.com
 
GE Aircraft Engines Inspection Kit
(GE-FQAP-690)
GE Inspection Technologies
50 Industrial Park Road
Lewistown, PA 17044
Attn: NDE Kit Coordinator
Email: ndttooling@ge.com
 
Nortec 1000
Ultrasonic Instrument
Olympus NDT Inc.
48 Woerd Avenue
Waltham, MA 02453
USA
 
USM Go / USN 60
Ultrasonic Instrument
GE Inspection Technologies
50 Industrial Park Road
Lewistown, PA 17044
USA
 
Couplant - water
--
(3)Locally Manufactured Tools. None.
B.Consumable Materials.
 
Code No.
Description
 
C04-166
Shot, Peening, Conditioned Cut Wire (conditioned cut wire)
 
C10-010
Abrasive Cloth (Scotch Brite pad)
 
C10-021
Tape, Plastic (masking tape)
 
C10-205
Almen Test Strips (test strips)
C.Referenced Procedures.
 
ATA No.
Description
 
70-24-01
Swab Etching Procedure
 
70-32-02
Fluorescent Penetrant Inspection
 
70-32-03
Spot-Fluorescent-Penetrant Inspection
 
70-32-06
Ultrasonic Inspection
 
70-32-10
2 MHZ Eddy Current Inspection Of Bores In Rotating Engine Hardware Using Systems Under Computer, Numeric, Or Robotic Control
 
70-32-23
Eddy Current Inspection Of Dovetail Slot Bottoms In Rotating Hardware Using An Automated System
 
70-42-00
Blending and Removal of High Metal Procedures
 
70-47-01
Shotpeening
 
Deleted
 
72-53-40
Special Procedures 001
 
72-53-40
Cleaning 001
D.Expendable Parts. None.
3 . Specific Inspection Procedure.
NOTE:
Any findings beyond manual limits that may be indicative of a possible crack and/or metallurgical defect must be reported to GE through a myGEAviation Technical Inquiry.
Subtask 72-53-40-230-001
A.Do a fluorescent penetrant inspection of the stage 1 disk as follows:
Subtask 72-53-40-230-002
(1)Make sure that the stage 1 disk is clean. Refer to TASK 72-53-40-100-801 (72-53-40, Cleaning).
(2)Do a Class G fluorescent penetrant inspection. Refer to TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION).
NOTE:
Make sure that the disk posts, slot bottoms, and lower minimum neck radii are clean.
•
Indications more than 0.015 inch (0.38 mm) are not permitted.
Subtask 72-53-40-250-003
B.Do an eddy current inspection of bore surfaces. Refer to TASK 70-32-10-250-003 (2 MHZ EDDY CURRENT INSPECTION OF BORES IN ROTATING ENGINE HARDWARE USING SYSTEMS UNDER COMPUTER, NUMERIC, OR ROBOTIC CONTROL).
NOTE:
Only trained persons identified and approved to do these inspections may do these tests. The authority to accept/reject hardware will not be given to the inspectors until they are certified. They must show they can satisfactorily do the necessary calibration and inspection procedures and correctly read the inspection results.
NOTE:
Changes to the procedure or substitutions for the equipment can cause you to detect less cracks. When you want to do or use something different, the procedure and equipment must be evaluated by the General Electric Company.
NOTE:
Material is equivalent to Rene 95. Use correction factors for calibration as appropriate. Refer to TASK 70-32-10-250-003 (2 MHZ EDDY CURRENT INSPECTION OF BORES IN ROTATING ENGINE HARDWARE USING SYSTEMS UNDER COMPUTER, NUMERIC, OR ROBOTIC CONTROL).
(1)Inspect the bore areas shown in the scan plan.
(2)Complete the eddy current data sheets.
Subtask 72-53-40-250-005
(3)Eddy current inspection evaluation limits.
(a)The evaluation limit is 750 mV.
Subtask 72-53-40-250-006
(4)Eddy current inspection reject limits.
(a)The reject limit is 750 mV after evaluation is complete.
Subtask 72-53-40-250-007
(5)All stage 1 disks that are rejected by the limits in Subtask 72-53-40-250-006 (paragraph 3.B.(4.)) are not serviceable. All stage 1 disks that are not rejected by the limits in Subtask 72-53-40-250-006 (paragraph 3.B.(4.)) are serviceable.
(6)Make sure that all records that were made during the eddy current inspection are as complete as possible. Permanently keep these records for each stage 1 disk that was inspected.
Subtask 72-53-40-250-023
C.Do an eddy current inspection of the stage 1 disk dovetail slot bottoms as follows:
Subtask 72-53-40-250-008
CAUTION:
DO NOT USE METAL BRUSHES TO CLEAN THE DISK DOVETAIL. METAL BRUSHES CAN CAUSE SCRATCHES. SCRATCHES CAN CAUSE THE SLOT BOTTOM SURFACE TO BE REJECTED DURING THE EDDY CURRENT INSPECTION.
(1)Make sure the disk is clean. Refer to TASK 72-53-40-100-801 (72-53-40, Cleaning 001).
Subtask 72-53-40-250-009
(2)Do an eddy current inspection of the dovetail slot bottoms. Refer to TASK 70-32-23-250-801 (72-32-23, EDDY CURRENT INSPECTION OF DOVETAIL SLOT BOTTOMS IN ENGINE ROTATING HARDWARE USING AN AUTOMATED SYSTEM).
NOTE:
Only trained persons identified and approved to do these inspections may do these tests. The authority to accept/reject hardware will not be given to the inspectors until they are certified. They must show they can satisfactorily do the necessary calibration and inspection procedures and correctly read the inspection results.
NOTE:
Changes to the procedure or substitutions for the equipment can cause you to detect less cracks. When you want to do or use something different, the procedure and equipment must be evaluated by the General Electric Company.
(3)Use the GE-FQAP-584   Inspection Kit to do the inspection of the disk dovetail slot bottoms.
(4)Examine the dovetail slot bottoms as shown in Figure 814.
Subtask 72-53-40-250-011
(5)Eddy current inspection evaluation limits.
(a)The evaluation limit is three divisions above null point.
Subtask 72-53-40-250-012
(6)Eddy current inspection reject limits.
(a)The rejection limit is three divisions above the null point after evaluation is complete.
Subtask 72-53-40-250-013
(7)All HPTR disks that are rejected by the limits in Subtask 72-53-40-250-012 (paragraph 3.C.(6)) are not serviceable. All disks that are not rejected by the limits in Subtask 72-53-40-250-011 (paragraph 3.C.(5)) are serviceable.
(8)Complete the eddy current data sheets.
(9)Make sure that all records that were made during the eddy current inspection are as complete as possible. Permanently keep these records for each HPTR disk that was inspected.
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 801   Stage 1 Disk - Eddy Current Bore Inspection - Calibration and Inspection Log
Subtask 72-53-40-270-001
D.Do an ultrasonic inspection of the coupling nut threads of the stage 1 disk shaft. Refer to TASK 70-32-06-270-001 (ULTRASONIC INSPECTION) and as follows:
NOTE:
This inspection describes the procedure and equipment required to do a piece part, a module level or an engine (with LPT shaft removed) ultrasonic inspection of the threads of the HPT stage 1 disk shaft which connect the stage 1 and stage 2 disks together. The inspection is intended for the detection of localized circumferential cracking in the root of the 1st thread, refer to Figure 802. This inspection is performed with 70 degree shear waves directed from forward to aft at the root of the first thread from the ID of the shaft, refer to Figure 803.
NOTE:
For specific cases where the procedures or equipment described here can not be applied in total, specific exceptions must be obtained in writing from the appropriate technical function before any inspection of hardware.
(1)Applicable Documents:
(a)NAS-410 (latest revision).
(b)Applicable manufacturer’s equipment user’s manual.
(c)FST Procedure 2286 - Kit Preparation and Quality Assurance Plan.
(2)Personnel Requirements:
(a)Personnel performing this inspection must be certified in accordance with NAS-410, or American Society of Nondestructive Testing (ASNT-TC-1A), or local certification process.
(b)It is strongly recommended that personnel performing this inspection receive practical training in the use of this procedure and must demonstrate proficiency in the calibration, inspection and evaluation routines before accept/reject authority is delegated.
(c)Any training that can be provided regarding the performance of this inspection does not imply that the personnel who receive that training have met the requirements for inspector certification in accordance with the appropriate certification document.
Subtask 72-53-40-820-001
(3)Initial Equipment Set-up:
NOTE:
Refer to the manufacturer’s equipment manual for the particular ultrasonic instrument being utilized for this inspection if any questions occur about the instrument’s use.
(a)Connect the ultrasonic instrument to the applicable power source and switch the instrument power to ON. Let the instrument warm up for at least 10 minutes or the manufacturer’s recommended warm up time.
(b)Make sure that the transducer is correctly inserted into the scanning fixture and that the transducer and fixture are attached together.
(c)Connect the probe to the instrument.
(d)Set the transducer position to the forward position.
(e)Adjust the ultrasonic instrument to the basic settings. Refer to Figure 808.
Subtask 72-53-40-220-171
(4)Pre-Inspection Preparation:
(a)Engines must be prepared for the inspection with the appropriate technical data to accomplish it as follows:
1Make sure to get access to the inspection area.
Subtask 72-53-40-820-002
(5)Equipment Calibration:
(a)Refer to Figure 804 and Figure 805.
(b)Prepare the ultrasonic instrument and the probe. Refer to Subtask 72-53-40-820-001 (paragraph 3.D.(3)).
(c)Apply couplant to the standard.
(d)Position the probe on the standard with the sound pointed to the electro-discharge machined (EDM) notch.
(e)Examine forward and backward to locate the response from the EDM notch. Maximize the response from the notch.
(f)Adjust the gain to set the response from the EDM notch to 60 percent of full screen height (FSH).
(g)Adjust the probe immediately only to set the response to 3.0 on the instrument baseline.
(h)Adjust the range only to set the response from the EDM notch to 6.0 on the instrument baseline.
(i)Record the instrument settings on the Form 2285-1. Refer to Figure 809.
Subtask 72-53-40-270-002
(6)Inspection:
(a)Make sure that the initial equipment set-up, the pre-inspection preparation and the system calibration are complete according to Subtask 72-53-40-820-001 (paragraph 3.D.(3)) thru Subtask 72-53-40-820-002 (paragraph 3.D.(5)).
(b)Set a gate from the 4th primary division to the 5th primary division on the instrument baseline at a level of 40 percent FSH. Refer to Figure 806.
(c)Apply couplant to the inspection area.
(d)Make sure that the probe position is at the forward number 1 position. Refer to Figure 804.
(e)Put the fixture on the inspection area touching against the radius. Refer to Figure 807.
(f)Examine in a circumferential direction making sure that the fixture is touching against the radius.
(g)Monitor the instrument for indications in the gate which are more than 40 percent of FSH.
(h)Examine repeatable indications which are equal to or more than 40 percent of FSH. Refer to Subtask 72-53-40-270-003 (paragraph 3.D.(8)).
(i)Set a gate from the 3rd primary division to the 4th primary division on the instrument baseline at a level of 40 percent FSH. Refer to Figure 806.
(j)Adjust the probe position to number 2 - aft. Refer to Figure 804.
(k)Apply couplant to the inspection area.
(l)Put the fixture on the inspection area touching up to the radius. Refer to Figure 807.
(m)Examine in a circumferential direction to make sure that the fixture is touching against the radius.
(n)Monitor the instrument for indications in the gate which are more than 40 percent of FSH.
(o)Examine repeatable indications which are equal to or more than 40 percent FSH. Refer to Subtask 72-53-40-270-003 (paragraph 3.D.(8)).
Subtask 72-53-40-820-003
(7)Calibration Check:
(a)A calibration check must be performed after inspection. Also, check calibration whenever any system component or operator is changed, after any loss of power and at any time the operator suspects a change in the system.
(b)If the amplitude of the response from the EDM notch has increased by more than 10 percent FSH above the calibration amplitude, the system must be re-calibrated before the inspection of additional hardware. It will be necessary to re-inspect any rejected hardware examined since the last acceptable calibration once correct calibration has been achieved.
(c)If the amplitude of the response from the EDM notch has decreased by more than 10 percent FSH below the calibration amplitude, the system must be re-calibrated and all hardware inspected since the last acceptable calibration or calibration check must be re-inspected.
Subtask 72-53-40-270-003
(8)Indication Evaluation:
(a)Any indication(s) that equals or exceeds 40 percent FSH must be evaluated as follows:
1Verify that the calibration is acceptable. Refer to Subtask 72-53-40-820-003 (paragraph 3.D.(7)).
2Repeat the inspection.
3If the indication repeats itself and is above 60 percent, the part is rejectable.
4Record the results on the Form 2285-1. Refer to Figure 809.
Subtask 72-53-40-270-004
(9)Documentation:
(a)All calibration and inspection data must be recorded on the Form 2285-1. Refer to Figure 809.
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 802   HPT Module - Thread Location
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Figure 803   Inspection Method
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Figure 804   Tooling
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Figure 805   Screen Display - Calibration
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Figure 806   Screen Display - Inspection
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Figure 807   Probe Position - Inspection
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Figure 808   Generic Preliminary Instrument Settings
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 809   Form 2285-1 - Operator Log Sheet
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 810   (Sheet 1 ) Stage 1 Disk Rim, Web, and Bore - Visual Inspection
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 810   (Sheet 2 ) Stage 1 Disk Rim, Web, and Bore - Visual Inspection
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 810   (Sheet 3 ) Stage 1 Disk Rim, Web, and Bore - Visual Inspection
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 810   (Sheet 4 ) Stage 1 Disk Rim, Web, and Bore - Visual Inspection
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 810   (Sheet 5 ) Stage 1 Disk Rim, Web, and Bore - Visual Inspection
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 811   (Sheet 1 ) Stage 1 Disk Forward Shaft - Visual Inspection
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 811   (Sheet 2 ) Stage 1 Disk Forward Shaft - Visual Inspection
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 812   (Sheet 1 ) Stage 1 Disk Aft Shaft - Visual Inspection
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 812   (Sheet 2 ) Stage 1 Disk Aft Shaft - Visual Inspection
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 813   (Sheet 1 ) Reference Image for Dovetail Slot Features
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 813   (Sheet 2 ) Corrosion Pitting Visual Standards - Dovetail Slot
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 813   (Sheet 3 ) Fretting Visual Standards - Pressure Face
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 813   (Sheet 4 ) Corrosion Pitting Visual Standards - R104 Materials
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 813   (Sheet 5 ) Corrosion Pitting Visual Standards - Inco 718 Materials
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 814   Stage 1 Disk - Eddy Current Dovetail Slot Bottom Inspection - Calibration and Inspection Log
Subtask 72-53-40-220-205
E.Do the special procedure as follows:
(1)Focused inspection of the forward middle radial rabbet for dents. Refer to TASK 72-53-40-800-802 (72-53-40, SPECIAL PROCEDURES 001).
Subtask 72-53-40-270-010
F.Do an immersion ultrasonic inspection of the stage 1 disk. Refer to TASK 72-53-40-800-803 (72-53-40, SPECIAL PROCEDURES 002).
4 . Visual Inspection.
The information that follows is applicable to all procedural steps for the visual inspection of the stage 1 disk surfaces:
•
Use a white light and where specified, use a 10-30X magnifying glass to do the inspection of the stage 1 disk surfaces
•
A pit is a shallow depression that resembles a small crater with rounded edges and with no raised metal. Pitting is caused by localized or selective etching or corrosion that results in holes or pockets
•
If damage to the stage 1 disk is more than the repairable limits, send the stage 1 disk to GE Aircraft Engines for evaluation.
Subtask 72-53-40-220-004
A.Do an inspection of the dovetail serrations. Refer to Figure 810 and as follows:
(1)Nicks and dents:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-005
(2)Scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-006
(3)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004) .
Subtask 72-53-40-220-007
B.Do an inspection of the dovetail pressure faces as follows. Refer to Figure 810.
(1)Nicks and dents:
Maximum serviceable limit:
Any amount, up to a maximum depth and area limits given below, after the removal of high metal. Refer to Figure 810 and TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
 
Pressure Face
Maximum depth,
inch (mm)
Area Limit,
square inch (square mm)
 
Upper
--
--
 
Lower
0.005 (0.12)
0.0045 (2.90)
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-008
(2)Wear, fretting, or galling:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-009
(3)Radial scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-010
(4)Axial scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-011
(5)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004) .
Subtask 72-53-40-220-012
C.Do an inspection of the dovetail upper minimum neck radii. Refer to Figure 810 and as follows:
(1)Nicks and dents:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-013
(2)Scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-014
(3)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004) .
Subtask 72-53-40-220-015
D.Do an inspection of the dovetail slot bottoms and lower minimum neck radii. Refer to Figure 810 and as follows:
(1)Nicks and dents:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-016
(2)Scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-017
(3)Pitting related to corrosion in the slot bottom:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004) .
Subtask 72-53-40-220-191
(4)Pitting related to corrosion in the lower minimum neck radii:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004) .
Subtask 72-53-40-220-018
E.Do an inspection of the rim OD and end faces as follows. Refer to Figure 810.
(1)Nicks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-019
(2)Dents:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-020
(3)Scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-021
(4)Galling and fretting on forward end face:
Maximum serviceable limit:
0.003 inch (0.08 mm).
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-198
(5)Galling and fretting on aft end face:
Maximum serviceable limit:
0.002 inch (0.06 mm).
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-022
(6)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004) .
Subtask 72-53-40-220-023
F.Do an inspection of the web and hub faces as follows. Refer to Figure 810.
NOTE:
Small scratches, nicks, dents, or other surface conditions can be seen on the hub and web areas (not the adjacent radii). It is possible these indications were blended to remove high metal, with a depth no greater than 0.001 inch (0.03 mm) deep. This condition is from new production and will have a surface finish that shows signs of shot peen. These indications are permitted.
(1)Nicks and scratches (forward upper web, forward lower web, and forward hub faces):
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) . Polish to the same finish as the adjacent area.
Subtask 72-53-40-220-024
(2)Nicks and scratches (for all other areas):
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) . Polish to the same finish as the adjacent area.
Subtask 72-53-40-220-025
(3)Dents (forward upper web, forward lower web, and forward hub faces):
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) . Polish to the same finish as the adjacent area.
Subtask 72-53-40-220-148
(4)Dents (for all other areas):
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) . Polish to the same finish as the adjacent area.
Subtask 72-53-40-220-149
(5)Fretting:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-165
(6)Pitting on the forward upper web related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004) .
Subtask 72-53-40-220-254
(7)Pitting on the aft upper/lower web related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004) .
Subtask 72-53-40-220-026
G.Do an inspection of the forward flange forward face and forward flange ID. Refer to Figure 811 and as follows:
(1)Fretting:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-027
(2)Nicks, dents, and scratches on the forward flange forward face:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-196
(3)Deleted.
Subtask 72-53-40-220-028
H.Do an inspection of the stage 2 disk pilot arm interface. Refer to Figure 812 and as follows:
(1)Fretting:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-029
(2)Deleted:
Maximum serviceable limit:
Deleted.
Repair method:
Deleted.
Subtask 72-53-40-220-150
(3)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-166
(4)Deleted.
Maximum serviceable limit:
Deleted.
Repair method:
Deleted.
Subtask 72-53-40-220-072
I.Do an inspection of the forward seal mounting face as follows. Refer to Figure 811 for:
(1)Galling, wear, or fretting:
Maximum serviceable limit:
0.002 inch (0.05 mm) after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-151
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-182
(3)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004) .
Subtask 72-53-40-220-067
J.Do an inspection of the mounting face of the sump seal pilot. Refer to Figure 812 and as follows:
(1)Fretting/pitting:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-068
(2)Nicks and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-069
(3)Dents:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-030
K.Do an inspection of the disk bore as follows. Refer to Figure 810.
(1)Nicks and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-031
(2)Dents:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-032
(3)Damage in the edge radius:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-033
L.Do an inspection of damper interface on the ID of forward shaft. Refer to Figure 811 and as follows:
(1)Fretting or wear:
Maximum serviceable limit:
0.0015 inch (0.03 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-152
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-077
(3)Deleted.
Subtask 72-53-40-220-192
(4)Deleted.
Maximum serviceable limit:
Deleted.
Repair method:
Deleted.
Subtask 72-53-40-220-034
M.Do an inspection of the boltholes on the forward shaft as follows. Refer to Figure 811.
(1)Fretting:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-035
(2)Damage in the edge radius:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-036
N.Do an inspection of the spline surfaces on the aft shaft as follows. Refer to Figure 812.
(1)Nicks or dents on the end faces:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-153
(2)Pickup, high metal, or burrs on all other surfaces:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-037
(3)Wear or galling on all other surfaces:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-038
(4)Nicks, dents, and scratches on major diameter and pressure faces (except root fillets):
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-039
(5)Nicks, dents, and scratches on minor diameter and root fillets:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-042
O.Do an inspection of the air duct rabbet/mate face on the aft shaft as follows. Refer to Figure 812
(1)Fretting:
Maximum serviceable limit:
0.003 inch (0.08 mm) in depth and 180 degrees of the circumference, if there is no high metal.
Maximum repairable limit:
0.003 inch (0.08 mm) in depth and 180 degrees of the circumference, after the removal of high metal.
Repair method:
Remove high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
NOTE:
Etch, FPI and shot peen are needed after high metal removal.
Subtask 72-53-40-220-043
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-044
P.Do an inspection of the internal and external surfaces in zone FA (critical) on the forward shaft as follows. Refer to Figure 811.
(1)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-045
Q.Do an inspection of the internal and external surfaces in zone FB (excluding mounting face of the sump seal pilot) on the aft shaft as follows. Refer to Figure 812.
(1)Nicks and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-046
(2)Dents:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-047
R.Do an inspection of the heat shield pilots as follows. Refer to Figure 812.
(1)Pickup and high metal:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-048
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-049
S.Do an inspection of the forward flange rabbet as follows. Refer to Figure 811.
(1)Fretting/wear:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-805 (72-53-40, REPAIR 008) .
Subtask 72-53-40-220-050
T.Do an inspection of the No. 4 bearing journal surface on the aft shaft as follows. Refer to Figure 812.
(1)Pickup and high metal:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-051
(2)Nicks and dents:
Maximum serviceable limit:
0.002 inch (0.05 mm) in depth, after the removal of high metal, if the damaged area is up to 3 percent of the surface in any 90 degree sector.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001).
Subtask 72-53-40-220-212
(3)Scores and scratches:
Maximum serviceable limit:
0.003 inch (0.07 mm) in depth, after the removal of high metal, if the damaged area is up to 3 percent of the surface in any 90 degree sector.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001).
Subtask 72-53-40-220-052
(4)Fretting:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-053
U.Do an inspection of the air duct threads on the aft shaft. Refer to Figure 812 and as follows:
(1)Nicks, dents, pickup, or high metal:
Maximum serviceable limit:
Not serviceable.
Repair method:
Blend the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-054
(2)Pitting:
Maximum serviceable limit:
Any amount, if you cannot measure the depth.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-055
V.Do an inspection of the No. 4 bearing radial oil scoop diameter (diameter BE) on the aft shaft as follows. Refer to Figure 812.
(1)Nicks and dents:
Maximum serviceable limit:
0.002 inch (0.05 mm) in depth, after the removal of high metal, if the damaged area is up to 5 percent of the surface in any 90 degree sector.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001).
Subtask 72-53-40-220-213
(2)Scores and scratches:
Maximum serviceable limit:
0.003 inch (0.07 mm) in depth, after the removal of high metal, if the damaged area is up to 5 percent of the surface in any 90 degree sector.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001).
Subtask 72-53-40-220-154
(3)Wear, galling, fretting, or rubbing:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-056
W.Do an inspection of all areas of the stage 1 disk for:
(1)Discoloration:
Maximum serviceable limit:
Any amount.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-076
X.Do an inspection of the disk post aft face below the retainer outer rabbet hook (area B and area K). Refer to Figure 810, Figure 811, and as follows:
(1)Nicks, dents, and scratches in area B.
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-255
(2)Nicks, dents, and scratches in area K:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-155
Y.Do an inspection of the interstage seal disk ID bayonet as follows. Refer to Figure 812.
(1)Fretting:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-156
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-222
(3)Wear on tab mounting faces of the interstage seal bayonet:
Maximum serviceable limit:
0.005 inch (0.12 mm) in depth, on each side, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) , Subtask 70-42-00-350-029 (GENERAL REMOVAL OF HIGH METAL (NO SHOT PEENING)) . After the removal of high metal, etch and FPI repaired area. Refer to TASK 70-24-01-110-034 (SWAB ETCHING PROCEDURE) and TASK 70-32-03-230-002 (SPOT-FLUORESCENT-PENETRANT INSPECTION) . Relevant linear indications are not permitted.
Repair method:
Repair. Refer to TASK 72-53-40-300-804 (72-53-40, REPAIR 005).
Subtask 72-53-40-220-223
(4)Wear on the sides of bayonets:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-256
(5)Nicks, dents, scratches, and wear on the corner of the bayonet tabs:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-224
Z.Do an inspection of the aft shaft tabs. Refer to Figure 812 and as follows:
(1)Fretting and wear:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-225
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-157
AA.Do an inspection of the forward seal ID bayonet pocket. Refer to Figure 811 and as follows:
(1)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-158
(2)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-159
(3)Deleted.
Maximum serviceable limit:
Deleted.
Repair method:
Deleted.
Subtask 72-53-40-220-183
(4)Deleted.
Maximum serviceable limit:
Deleted.
Repair method:
Deleted.
Subtask 72-53-40-220-184
(5)Deleted.
Maximum serviceable limit:
Deleted.
Repair method:
Deleted.
Subtask 72-53-40-220-160
AB.Do an inspection of the forward middle radial rabbet. Refer to Figure 810 and as follows:
(1)Fretting and wear footprint on forward middle radial rabbet (caused by contact from the HPT Forward Seal Diameter F):
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
0.001 inch (0.02 mm) in depth after repair.
Repair method:
Do the repair as follows:
•
Polish the footprint/witness marks with C10-010  Scotch Brite pad (or equivalent) in order to remove smeared or burred material. Maximum depth of fretting/wear permitted after polish is 0.001 inch (0.02 mm).
•
Etch the polished locations. Refer to TASK 70-24-00-110-033 (ETCHING PROCEDURES FOR FLUORESCENT-PENETRANT INSPECTION) and TASK 70-24-01-110-034 (SWAB ETCHING PROCEDURE). Use Class C and Class G etchant.
•
Fluorescent penetrant inspect the etched locations. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-03-230-002 (SPOT-FLUORESCENT-PENETRANT INSPECTION), and as follows:
• Use Class G penetrant
• Use non-aqueous wet developer (NAWD)
• No linear indications are permitted.
•
Shot peen the entire middle radial rabbet. Refer to TASK 72-53-40-300-802 (72-53-40, Repair 004).
NOTE:
During the accomplishment of the shot peening operation, make sure that all of the axial face (surface FR with the chamfer) is also peened.
Subtask 72-53-40-220-161
(2)Deleted.
Maximum serviceable limit:
Deleted.
Repair method:
Deleted.
Subtask 72-53-40-220-206
(3)Nicks and dents located on the forward middle radial rabbet (including the adjacent chamfer):
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
0.002 inch (0.05 mm) in depth, after the removal of high metal, if the following criterias are met:
•
The total damage area for any defects located in the footprints is not more than 0.0035 sq. in. (2.258 sq mm) for each footprint (footprints are caused by contact with the interrupted diameter of the HPT rotor forward seal)
•
TASK 72-53-40-800-802 (72-53-40, SPECIAL PROCEDURES 001) is completed. This procedure is necessary to make sure that there is no adverse bulging on the adjacent axial face (surface FR) caused by nicks and dents on the forward middle radial rabbet.
Repair method:
Remove high metal manually. No power tools are permitted. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-53-40-220-235
(4)Deleted.
Maximum serviceable limit:
Deleted.
Repair method:
Deleted.
Subtask 72-53-40-220-207
(5)Deleted.
Maximum serviceable limit:
Deleted.
Repair method:
Deleted.
Subtask 72-53-40-220-167
(6)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004) .
Subtask 72-53-40-220-208
AC.Do an inspection of the axial face adjacent to the forward middle radial rabbet (surface FR) as follows:
(1)Do a x10 white light focused inspection of the axial face for bulging or plastic deformation:
Maximum serviceable limit:
0.002 inch (0.05 mm) in depth, after the accomplishment of TASK 72-53-40-800-802 (72-53-40, SPECIAL PROCEDURES 001) .
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-257
AD.Do an inspection of stage 2 disk flange rabbet/mate face for:
(1)Wear, fretting, or galling:
Maximum serviceable limit:
0.005 inch (0.12 mm) in depth, after the removal of high metal. Refer to TASK TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-258
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
0.005 inch (0.12 mm) in depth, after the removal of high metal. Refer to TASK TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Repair the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-259
(3)Pitting:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-260
AE.Do an inspection of the forward upper radial rabbet surface. Refer to Figure 810 and as follows:
(1)Fretting:
Maximum serviceable limit:
0.0015 inch (0.038 mm) in depth, after the removal of high metal, if the total affected area is less than 0.0053 sq. in. (3.419 sq mm).
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-261
(2)Nicks and dents:
Maximum serviceable limit:
0.0015 inch (0.038 mm) in depth, after the removal of high metal, if the total affected area is less than 0.0053 sq. in. (3.419 sq mm).
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-262
(3)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-263
AF.Do an inspection of the forward seal inner radial rabbet surface. Refer to Figure 811 and as follows:
(1)Fretting:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-264
(2)Nicks and dents:
Maximum serviceable limit:
0.002 inch (0.05 mm) in depth, after the removal of high metal, if the total affected area is less than 0.2096 sq. in. (135.225 sq mm).
Repair method:
Repair. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-265
(3)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-266
AG.Do an inspection of the stage 1 blade retainer outer radial rabbet surface. Refer to Figure 810 and as follows:
(1)Fretting:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-267
(2)Nicks and dents:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-268
(3)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-269
AH.Do an inspection of the stage 1 blade retainer inner radial rabbet surface. Refer to Figure 810 and as follows:
(1)Fretting:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-270
(2)Nicks and dents:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-271
(3)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-272
AI.Do an inspection of the coupling nut threads on the aft shaft. Refer to Figure 812 and as follows:
(1)Nicks, dents, pickup, and high metal:
Maximum serviceable limit:
Not serviceable.
Repair method:
Blend the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-273
(2)Pitting:
Maximum serviceable limit:
Any amount, if you cannot measure the depth.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-274
AJ.Do an inspection of the No. 4 bearing round plain nut threads on the aft shaft. Refer to Figure 812 and as follows:
(1)Nicks, dents, pickup, and high metal:
Maximum serviceable limit:
Not serviceable.
Repair method:
Blend the disk. Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) .
Subtask 72-53-40-220-275
(2)Pitting:
Maximum serviceable limit:
Any amount, if you cannot measure the depth.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-276
AK.Do an inspection of the forward face of the forward bayonet tabs. Refer to Figure 811 and as follows:
(1)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-277
(2)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-278
AL.Do an inspection of the OD face of the forward bayonet tabs. Refer to Figure 811 and as follows:
(1)Fretting and wear:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-279
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-280
(3)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-281
AM.Do an inspection of the scallop faces of the forward bayonet tabs. Refer to Figure 811 and as follows:
(1)Fretting and wear:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-282
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-283
(3)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-284
AN.Do an inspection of the aft face of the forward bayonet tabs. Refer to Figure 811 and as follows:
(1)Fretting, galling, and wear:
Maximum serviceable limit:
0.002 inch (0.05 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-285
(2)Nicks and dents:
Maximum serviceable limit:
0.0025 inch (0.06 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-286
(3)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-287
AO.Do an inspection of the forward middle radial rabbet fillet. Refer to Figure 811 and as follows:
(1)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-288
(2)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-289
AP.Do an inspection of the forward upper radial rabbet fillet. Refer to Figure 811 and as follows:
(1)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-290
(2)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-291
AQ.Do an inspection of the stage 1 blade retainer outer radial rabbet fillet. Refer to Figure 811 and as follows:
(1)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-292
(2)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-293
AR.Do an inspection of the stage 1 blade retainer inner radial rabbet fillet. Refer to Figure 811 and as follows:
(1)Nicks, dents, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-294
(2)Pitting related to corrosion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-53-40-300-802 (72-53-40, REPAIR 004).
Subtask 72-53-40-220-295
AS.Do an inspection of the forward flange aft face. Refer to Figure 811 and as follows:
(1)Nicks and dents:
Maximum serviceable limit:
0.0025 inch (0.063 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-296
(2)Galling, fretting, and wear:
Maximum serviceable limit:
0.002 inch (0.05 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Replace the stage 1 disk.
5 . Dimensional Inspection.
Refer to Figure 815.
Subtask 72-53-40-220-057
A.Measure diameter AX (rim OD) at four equally spaced locations 0.720 inch (18.29 mm) from the aft end face of the post. Compare the average of the four measurements to the average of the diameters stamped on the rim.
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 815   Dimensional Inspection
Subtask 72-53-40-220-058
B.Do an inspection of the stage 1 disk for:
(1)Diameter AX:
Minimum serviceable limit:
Average of diameters stamped on the rim minus 0.0048 inch (0.121 mm).
Maximum serviceable limit:
Average of diameters stamped on the rim plus 0.010 inch (0.25 mm).
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-059
(2)Diameter G:
Minimum serviceable limit:
15.248 inches (387.30 mm).
Maximum serviceable limit:
15.252 inches (387.40 mm).
Repair method:
Repair. Refer to TASK 72-53-40-300-805 (72-53-40, REPAIR 008) .
Subtask 72-53-40-220-060
(3)Diameter W:
Minimum serviceable limit:
22.486 inches (571.14 mm)
Maximum serviceable limit:
22.494 inches (571.35 mm)
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-061
(4)Diameter V:
Minimum serviceable limit:
16.423 inches (417.14 mm).
Maximum serviceable limit:
16.431 inches (417.35 mm).
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-062
(5)Diameter X:
Minimum serviceable limit:
22.478 inches (570.94 mm).
Maximum serviceable limit:
22.486 inches (571.14 mm).
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-168
(6)Concentricity of diameter K relative to the center line established from diameter G and surface H:
Minimum serviceable limit:
None.
Maximum serviceable limit:
0.002 inch (0.05 mm).
Repair method:
Replace the stage 1 disk.
Subtask 72-53-40-220-063
C.Calculate and do an inspection of dimension ZZ as follows:
(1)Calculate dimension XX as diameter X minus 22.480 inches (570.99 mm).
Subtask 72-53-40-220-064
(2)Calculate dimension YY as follows:
(a)Calculate the average of the diameters AX. Refer to 72-53-40-220-058 (paragraph 5.B.(1)).
(b)Subtract diameter AX stamped on the rim.
Subtask 72-53-40-220-065
(3)Dimension ZZ is equal to dimension YY minus dimension XX.
Subtask 72-53-40-220-066
(4)Do an inspection of calculated dimension ZZ for:
Minimum serviceable limit:
Any amount.
Maximum serviceable limit:
0.006 inch (0.15 mm).
Repair method:
Replace the stage 1 disk.
6 . Post Inspection Procedure.
Subtask 72-53-40-380-005
A.Shotpeen the surfaces in the marked zones. Refer to Figure 816 and TASK 72-53-40-300-807 (72-53-40, REPAIR 010).
NOTE:
It is not necessary to peen again the zones that were peened during the repair cycle. Peening is necessary only for the zones that were not peened during the repair cycle.
(1)Deleted.
(2)Deleted.
(3)Deleted.
(4)Deleted.
(5)Deleted.
(6)Deleted.
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 816   (Sheet 1 ) HPT Stage 1 Disk - Post Inspection ShotPeening Zones
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 816   (Sheet 2 ) HPT Stage 1 Disk - Post Inspection ShotPeening Zones
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 816   (Sheet 3 ) HPT Stage 1 Disk - Post Inspection ShotPeening Zones