* * * FOR ALL
TASK 72-31-46-300-802
1 . Repair for the CDP Seal:
A.This procedure gives instructions to repair the following areas of the high pressure compressor discharge pressure rotating seal (CDP seal) by blending. Refer to Figure 901.
(1)Forward and aft outer web area.
(2)Forward and aft mating flanges.
(3)Forward and aft rabbet diameters.
(4)Deleted.
(5)Bore.
(6)All other areas:
(a)Forward and aft web.
(b)Forward and aft bore hub faces.
(c)Between seal serrations.
(d)Forward and aft rabbet faces.
B.The following maximum repairable limits apply to this repair:
NOTE:
The information below gives maximum repairable limits for the applicable Inspection sections. The paragraphs are numbered the same as the manual Inspection sections.
NOTE:
For 72-31-46, Inspection 001. Refer to TASK 72-31-46-200-801 (72-31-46, INSPECTION 001) .
(4)Visual Inspection.
(b)Do an inspection of the forward and aft outer web area for:
1Nicks, dents, tears, or scratches:
Maximum repairable limit:
Any amount up to a maximum blend depth of 0.005 inch (0.13 mm).
(c)Do an inspection of the forward and aft mating flange surfaces for:
1Nicks, dents, or scratches:
Maximum repairable limit:
Any amount up to a maximum blend depth of 0.003 inch (0.08 mm) with a minimum of 20-to-1 width-to-depth ratio, limited to areas not within 0.050 inch (1.30 mm) of bolt hole edge radius.
(e)Do an inspection of the forward rabbet (this does not include the rabbet fillet) for:
1Nicks, dents, or scratches:
Maximum repairable limit:
Any amount up to a maximum blend depth of 0.005 inch (0.13 mm) and the total (cumulative) length of the blends is not more than 0.300 inch (7.62 mm).
(g)Do an inspection of the aft rabbet (this does not include the rabbet fillet) for:
1Nicks, dents, or scratches:
Maximum repairable limit:
Any amount up to a maximum blend depth of 0.005 inch (0.13 mm) and the total (cumulative) length of the blends is not more than 0.300 inch (7.62 mm).
(i)Do an inspection of the seal serrations for:
1Nicks, tears, dents, or bends:
Maximum repairable limit:
Not repairable.
(j)Do an inspection of the bore for:
2Marks, nicks, dents and scratches:
Maximum repairable limit:
Any amount, if damage can be removed with one blend. 0.003 inch (0.07 mm) in depth and 1.00 (25.4 mm) in length with a minimum radius of 0.250 inch (6.35 mm).
(k)Do an inspection of all other areas of the CDP seal not included above for:
1Marks, nicks, dents, and scratches:
Maximum repairable limit:
Any amount up to a maximum blend depth of 0.005 inch (0.13 mm).
C.The subsequent table gives a list of the part numbers that are applicable to this repair. All part numbers are applicable to all paragraphs unless specified differently.
 
Part Number(s)
 
2116M68P01  
2383M82P03  
2445M74P01  
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D.Proprietary/Complex Process Statement.
(1)None.
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. None.
(3)Locally Manufactured Tools. None.
B.Consumable Materials.
 
Code No.
Description
 
C04-166
Shot, Peening, Conditioned Cut Wire (CCW14 shot)
 
C10-010
Abrasive Cloth
 
C10-021
Tape, Plastic
C.Referenced Procedures.
 
ATA No.
Description
 
70-21-00
Chemical Cleaning
 
70-21-03
Cleaning Method 3 - Steam Cleaning
 
70-24-00
Etching Procedures for Fluorescent-Penetrant Inspection
 
70-24-01
Swab Etching Procedure
 
70-32-00
Indirect Inspection Methods
 
70-32-02
Fluorescent Penetrant Inspection
 
70-32-03
Spot-Fluorescent-Penetrant Inspection
 
70-42-00
Blending and Removal of High Metal Procedures
 
70-47-01
Shotpeening
 
72-31-46
Inspection 001
D.Expendable Parts. None.
E.SPD Information. None.
F.Special Solutions. None.
G.Test Specimens. None.
3 . Dimensional Information.
Subtask 72-31-46-220-038
A.Refer to Figure 901 for specified dimensions and locations.
NOTE:
The dimensional data identified within this procedure was designed using inches as the base unit of measurement for dimensional values. The conversion to millimeters is rounded to one less decimal digit than inches. For minimum dimensions, converted values are rounded up. For maximum dimensions, converted values are rounded down. To avoid conversion errors, do not reconvert from millimeters to inches.
4 . Setup Information.
None.
5 . Procedure.
Subtask 72-31-46-350-009
A.If there is coating on the seal teeth, mask the seal teeth. Refer to Figure 901 and as follows:
(1)Use C10-021   plastic tape.
Subtask 72-31-46-350-010
B.Blend the CDP seal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES), Figure 901, and as follows:
(1)For the blending limits refer to paragraph 1.B.
Subtask 72-31-46-100-003
C.Clean the repaired areas. Refer to TASK 70-21-00-110-051 (CHEMICAL CLEANING) and TASK 70-21-03-160-001 (CLEANING METHOD 3 - STEAM CLEANING).
Subtask 72-31-46-110-017
D.Etch the repaired areas. Refer to TASK 70-24-00-110-033 (ETCHING PROCEDURES FOR FLUORESCENT-PENETRANT INSPECTION), TASK 70-24-01-110-034 (SWAB ETCHING PROCEDURE), and as follows:
(1)Use Class C or Class G etchant.
Subtask 72-31-46-200-001
E.Alternative Procedure Available. Do an inspection of the repaired areas. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION), and as follows:
(1)Use Class G penetrant.
(2)Indications more than 0.015 inch (0.38 mm) are not permitted.
(3)Linear indications are not permitted.
NOTE:
Linear indications are indications that are at least three times longer that they are wide.
Subtask 72-31-46-200-002
E.A.Alternative Procedure. Do an inspection of the repaired areas. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-03-230-002 (SPOT-FLUORESCENT-PENETRANT INSPECTION), and as follows:
(1)Use Class G penetrant.
(2)Indications more than 0.015 inch (0.38 mm) are not permitted.
(3)Linear indications are not permitted.
NOTE:
Linear indications are indications that are at least three times longer that they are wide.
Subtask 72-31-46-350-011
WARNING:
USE EYE PROTECTION WHEN YOU POLISH MATERIAL OR PARTS. THE PARTICLES CAN CAUSE AN INJURY TO YOUR EYES. USE IN A WELL-VENTILATED AREA.
F.Polish the CDP Seal repair area to remove the effects of the swab etching procedure as follows:
(1)Use C10-010   abrasive cloth.
Subtask 72-31-46-380-002
G.Peen the repaired areas. Refer to TASK 70-47-01-380-016 (SHOTPEENING), Figure 901, and as follows:
(1)Use C04-166   CCW14 shot.
(2)Peen to an intensity of 0.006-0.012 N.
(3)Intensity verification is necessary in all peened surfaces.
(4)Coverage must be a minimum of 100 percent.
(5)Overspray is permitted.
Subtask 72-31-46-100-004
H.Clean the repaired areas. Refer to TASK 70-21-00-110-051 (CHEMICAL CLEANING) and TASK 70-21-03-160-001 (CLEANING METHOD 3 - STEAM CLEANING).
Subtask 72-31-46-220-039
I.Do a final inspection of the CDP seal blended areas.
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Figure 901   (Sheet 1 ) High Pressure Turbine Compressor Discharge Pressure Rotating Seal - Visual Information
* * * FOR ALL
Figure 901   (Sheet 2 ) High Pressure Turbine Compressor Discharge Pressure Rotating Seal - Visual Information