* * * FOR ALL
TASK 72-41-20-300-805
1 . Replacement of the T800 Thermal Spray Coating on the W-Seal Surface N, W-Seal Surface M, and Rabbet Diameter C.
A.This procedure gives instructions to repair the stage 10 outlet guide vane (OGV) by removing and replacing the T800 thermal spray wear coating on the W-seal surface N, W-seal surface M, and rabbet diameter C. Refer to Figure 901.
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.
(4)Visual Inspection.
(d)Do an inspection of the wear coat on diameter C for the following. Refer to Figure 802.
1 Wear-through of the wear coat:
Maximum repairable limit:
Any amount, if the parent material thickness, dimension CS, is 0.047 inch (1.19 mm) or more.
2Missing wear coat:
Maximum repairable limit:
Any amount, if the parent material thickness, dimension CS, is 0.047 inch (1.19 mm) or more.
3Craze cracking:
Maximum repairable limit:
Any amount, if the parent material thickness, dimension CS, is 0.047 inch (1.19 mm) or more.
(e)Do an inspection of the wear coat on surface N for the following. Refer to Figure 802.
1Wear-through of the wear coat:
Maximum repairable limit:
Any amount, if the parent material thickness, dimension JS, is 0.040 inch (1.02 mm) or more.
2Missing wear coat:
Maximum repairable limit:
Any amount, if the parent material thickness, dimension JS, is 0.040 inch (1.02 mm) or more.
3Craze cracking:
Maximum repairable limit:
Any amount, if the parent material thickness, dimension JS, is 0.040 inch (1.02 mm) or more.
(l)Do an inspection of the wear coat on surface M for the following. Refer to Figure 802.
1Wear-through of the wear coat:
Maximum repairable limit:
Any amount, if the parent material thickness, dimension KS, is 0.030 inch (0.76 mm) or more.
2Missing wear coat:
Maximum repairable limit:
Any amount, if the parent material thickness, dimension KS, is 0.030 inch (0.76 mm) or more.
3Craze cracking:
Maximum repairable limit:
Any amount, if the parent material thickness, dimension KS, is 0.030 inch (0.76 mm) or more.
(5)Dimensional Inspection.
(c)Do an inspection of the stage 10 OGV for:
1Diameter C:
Maximum repairable limit:
Any amount, if the parent material thickness, dimension CS, is 0.047 inch (1.19 mm) or more.
7Dimension J:
Maximum repairable limit:
Any amount, if the parent material thickness, dimension JS, is 0.040 inch (1.02 mm) or more.
8Dimension K:
Maximum repairable limit:
Any amount, if the parent material thickness, dimension KS, is 0.030 inch (0.76 mm) or more.
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)
 
2303M16G02  
2303M16G04  
2303M16G05  
2303M16G06  
 
2303M16G07  
2303M16G08  
2763M05G02  
2763M05G03  
 
2763M05G04  
2763M05G05  
2763M05G06  
2763M05G07  
 
2763M05G08  
2763M05G09  
2763M05G10  
2763M05G11  
D.Proprietary/Complex Process Statement.
(1)None.
2 . Tools, Equipment, and Materials.
NOTE:
Repair sources can use equivalent alternatives for tools, equipment, and consumable materials, however, the repair source must demonstrate and document equivalency.
A.Tools and Equipment.
(1)Special Tools. None.
(2)Standard Tools and Equipment. None.
(3)Locally Manufactured Tools.
 
Description
Figure
 
Machining Fixture
902
B.Consumable Materials.
 
Code No.
Description
 
C10-012
Tape, Masking, High Temperature (masking tape)
 
C10-155
Shims, Metal (shims)
C.Referenced Procedures.
 
ATA No.
Description
 
70-00-03
Machining Data
 
70-24-00
Etching Procedures for Fluorescent-Penetrant Inspection
 
70-24-01
Swab Etching Procedures
 
70-31-00
Dimensional Inspection
 
70-31-06
Machined Features Shop-Run Tolerances
 
70-32-00
Indirect Inspection Methods
 
70-32-03
Spot-Fluorescent-Penetrant Inspection
 
70-42-00
Blending and Removal of High Metal Procedures
 
70-49-00
Thermal Spraying
 
70-49-30
Thermal Spraying Cobalt-Molybdenum-Chromium-Silicon Alloy (Powder) - Tribaloy 800
 
70-49-43
High Density HVOF T-800 (Tribaloy) Coating
 
70-49-50
High Density HVOF Rene 80 Coating
 
70-49-56
Thermal Spraying - Standard Practice - Thermal Spraying Rene 80 Coating
 
72-41-20
Cleaning 001
 
72-41-20
Inspection 001
 
72-41-20
Repair 001
 
--
Photo Standard 8311253
D.Expendable Parts. None.
E.SPD Information. None.
(1)Locally Manufactured SPD. None.
F.Special Solutions. None.
G.Test Specimens. Refer to TASK 70-49-43-340-042 (HIGH DENSITY HVOF T-800 (TRIBALOY) COATING), and TASK 70-49-50-340-049 (HIGH DENSITY HVOF RENE 80 COATING), or TASK 70-49-30-340-031 (THERMAL SPRAYING COBALT-MOLYBDENUM-CHROMIUM-SILICON ALLOY (POWDER) - TRIBALOY 800), and TASK 70-49-56-340-803 (THERMAL SPRAYING - STANDARD PRACTICE - THERMAL SPRAYING RENE 80 COATING).
3 . Dimensional Information.
Subtask 72-41-20-220-057
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.
NOTE:
To measure dimension l, an average of six equally spaced circumferential locations must be used.
NOTE:
A dimension that is at the serviceable limit is always permitted, and repair is not necessary. Refer to TASK 72-41-20-200-801 (72-41-20, INSPECTION 001), for the serviceable limits.
NOTE:
Reference dimensions do not require inspection.
 
Minimum
Maximum
Minimum
Maximum
 
In-Process
In-Process
Finish
Finish
Reference
 
Description
Dimension
Dimension
Dimension
Dimension
Dimension
 
Dia. C
--
--
24.970 in.
24.978 in.
--
 
(634.24 mm)
(634.44 mm)
 
Dim. CS
0.047 in.
--
--
--
--
 
(1.20 mm)
 
Dim. J
--
--
5.814 in.
5.824 in.
--
 
(147.68 mm)
(147.92 mm)
 
Dim. JS
0.040 in.
--
--
--
--
 
(1.02 mm)
 
Dim. K
--
--
5.466 in.
5.474 in.
--
 
(138.84 mm)
(139.03 mm)
 
Dim. KS
0.030 in.
--
--
--
--
 
(0.77 mm)
4 . Setup Information.
Subtask 72-41-20-350-017
A.Set-up the OGV for machining. Refer to Figure 902 and as follows:
(1)If necessary, make the machining fixture.
Subtask 72-41-20-350-028
(2)Install the machining fixture on the machining table as follows:
(a)Adjust the position of the machining fixture to get the runout of surface X to 0.001 inch (0.02 mm) FIR or less as follows:
1If necessary, put C10-155  shims between the machining fixture and the machining table to get the necessary runout.
Subtask 72-41-20-350-029
(b)If necessary, adjust the position of the machining fixture to make sure that the runout of diameter Y is 0.001 inch (0.02 mm) FIR or less.
(c)Use four 0.500-13 UNC socket headed cap screws to hold the machining fixture to the machining table and as follows:
1Make sure that the runouts of surface X and diameter Y agree with the requirements specified in Subtask 72-41-20-350-028 (paragraph 4.A.(2)(a)) and Subtask 72-41-20-350-029 (paragraph 4.A.(2)(b)).
Subtask 72-41-20-350-021
(3)Install the OGV onto the machining fixture as follows:
NOTE:
The OGV flange temperature can be increased to help with its installation onto the machining fixture.
(a)Put the OGV onto the machining fixture and align the boltholes in the flange with the 17 threaded holes in the machining fixture.
(b)Attach the OGV to the machining fixture with 17 0.375-16 UNC bolts or screws.
Subtask 72-41-20-220-062
(4)Make sure that the OGV is installed flat on the machining fixture as follows:
(a)The maximum permitted clearance between surface X of the machining fixture and surface F of the OGV is 0.002 inch (0.05 mm).
5 . Procedure.
Subtask 72-41-20-160-003
A.If necessary, clean the OGV. Refer to TASK 72-41-20-100-801 (72-41-20, CLEANING 001).
Subtask 72-41-20-350-018
B.If necessary, remove the pins, springs, and leaf seals from the OGV. Refer to TASK 72-41-20-300-801 (72-41-20, REPAIR 001).
Subtask 72-41-20-320-003
CAUTION:
MAKE SURE TO REMOVE THE MINIMUM QUANTITY OF PARENT MATERIAL NECESSARY TO REMOVE DEFECTS. DAMAGE TO THE OGV CAN OCCUR.
C.Machine the OGV to remove the thermal spray coating and/or remove wear damage on surface N, surface M, and diameter C. Refer to TASK 70-00-03-800-004 (MACHINING DATA), Subtask 72-41-20-220-057 (paragraph 3.A.), Dimensional Information, Figure 901, Figure 903, and as follows:
NOTE:
HVOF thermal spray coating can only be removed by machining.
NOTE:
HVOF thermal spray coating will come off in small chips when machined and parent material will come off in continuous curl when machined.
(1)If there is no wear on the parent material and you removed the thermal spray coating, go to Subtask 72-41-20-110-012 (paragraph 5.E.).
Subtask 72-41-20-350-022
(2)Set-up the OGV for machining. Refer to Subtask 72-41-20-350-017 (paragraph 4.A.), Setup Information.
Subtask 72-41-20-320-004
CAUTION:
DO NOT REMOVE MORE MATERIAL THAN THE IN-PROCESS LIMITS FOR DIMENSION JS, DIMENSION KS, AND/OR DIMENSION CS SPECIFIED IN PARAGRAPH 3.A., DIMENSIONAL INFORMATION. YOU CAN CAUSE DAMAGE TO THE OGV IF YOU REMOVE MORE MATERIAL.
(3)Machine surface N in area BC, surface M in area BD, and diameter C in area BE to remove the HVOF thermal spray coating as follows:
NOTE:
The thickness of the thermal spray coating that was applied must be 0.0035-0.0075 inch (0.089-0.190 mm), if no bond coat was applied previously.
NOTE:
During machining, a surface with remaining thermal spray coating will show as a matt surface.
NOTE:
During machining, a surface with no remaining thermal spray coating will show as a bright surface.
NOTE:
The thermal spray coating will have a higher resistance to the machining when it is compared to the resistance of the parent material.
NOTE:
Thermal spray coating will come off in small chips when machined and parent material will come off in continuous curl when machined.
(a)Do not remove more material than necessary to remove the thermal spray coating on the parent material.
(b)If you cannot remove the thermal spray coating to the minimum in-process dimensions of dimension JS, dimension KS, and dimension CS, then you cannot repair the OGV with this procedure.
Subtask 72-41-20-320-005
(4)If necessary, machine surface N in area BC, surface M in area BD, and diameter C in area BE to remove wear on the parent material as follows:
(a)Do not remove more material than is necessary to remove wear damage or raised material on the parent material.
(b)If you cannot remove wear damage to the minimum in-process dimensions of dimension JS, dimension KS, and/or dimension CS, then you cannot repair the OGV with this procedure.
Subtask 72-41-20-220-063
(5)Do a dimensional inspection of diameter C. Refer to TASK 70-31-00-220-001 (DIMENSIONAL INSPECTION), TASK 70-31-06-220-001 (MACHINED FEATURES SHOP-RUN TOLERANCES), Figure 901, and as follows:
(a)Do an inspection of the runout of diameter C in area BE.
Subtask 72-41-20-320-006
(6)If necessary, machine the OGV to agree with the dimensional limits for the runout of diameter C in area BE, surface M in area BD, and as follows:
(a)Do not remove more material than is necessary to meet the dimensional limits for runout of diameter C in area BE and surface M in area BD.
(b)If you cannot meet the dimensional limits for runout of diameter C in area BE and surface M in area BD, and the minimum in-process dimension of dimension CS and dimension KS, then you cannot repair the OGV with this procedure.
Subtask 72-41-20-350-023
(7)Blend the OGV repair areas. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES), and as follows:
(a)Break all sharp edges to 0.005-0.010 inch (0.13-0.25 mm).
Subtask 72-41-20-350-024
(8)Remove the OGV from the machining fixture.
Subtask 72-41-20-220-068
D.Do an inspection of the OGV repair areas. Refer to Subtask 72-41-20-220-057 (paragraph 3.A.), Dimensional Information, Figure 901, Figure 902, and as follows:
(1)Do an inspection to make sure that dimension JS, dimension KS, and dimension CS agree with the minimum in-process dimensions.
(2)Measure dimension J in area BC, dimension K in area BD, and diameter C in area BE and record the in-process dimensions to use them later. Refer to Subtask 72-41-20-340-001 (paragraph 5.I.).
(3)Remove the OGV from the machining fixture.
Subtask 72-41-20-110-012
E.Etch the OGV blended 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 etchant.
Subtask 72-41-20-230-005
F.Do an inspection of the OGV repair 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 A penetrant.
(2)Through Indications are not permitted.
Subtask 72-41-20-220-064
(3)Indications less than 0.030 inch (0.76 mm) are permitted.
(4)Indications 0.030-0.060 inch (0.77-1.52 mm) are permitted if they agree with the conditions that follow:
(a)They are not linear indications.
NOTE:
Linear indications are indications that are at least four times longer than they are wide.
(b)The distance between indications is a minimum of 0.250 inch (6.35 mm).
(5)Microshrinkage must agree with GEAE Photo Standard 8311253, Class 20.
(6)If you find indications that do not agree with these limits, you cannot repair the OGV with this procedure.
Subtask 72-41-20-160-004
G.If necessary, clean the OGV. Refer to TASK 72-41-20-100-801 (72-41-20, CLEANING 001).
Subtask 72-41-20-220-065
H.Use dimension J, dimension K, and diameter C recorded in Subtask 72-41-20-220-068 (paragraph 5.D.) to calculate the coating thickness that is necessary to get the finish dimensions of dimension J, dimension K, and diameter C after final machining. Refer to Subtask 72-41-20-220-057 (paragraph 3.A.), Dimensional Information.
Subtask 72-41-20-340-001
WARNING:
DO NOT THERMAL SPRAY IF YOU ARE NOT APPROVED (TRAINED AND QUALIFIED). USE PERSONAL PROTECTION EQUIPMENT AND APPROVED SAFETY PROCEDURES. USE EITHER A CONTINUOUS-FLOW EXHAUST SYSTEM OR A WATER-CURTAIN EXHAUST SYSTEM. WATER-CURTAIN EXHAUST SYSTEMS MAY COLLECT OVERSPRAY PARTICLES OF SOME METALS (MAGNESIUM, ALUMINUM AND IRON) AND CAN FORM HYDROGEN. WHEN MIXED WITH AIR, HYDROGEN CAN BURN AND IS EXPLOSIVE.
I.Alternative Procedure Available. Thermal-spray the OGV repair surface in area BC, area BD, and diameter C in area BE and the test specimens. Refer to Figure 901, Figure 903, and as follows:
CAUTION:
DO NOT USE METALLIC INSTRUMENTS TO APPLY OR REMOVE THE MASKING TAPE. YOU CAN CAUSE DAMAGE TO THE OGV AND REDUCE THE FATIGUE LIFE OF THE PART IF YOU USE METALLIC INSTRUMENTS.
(1)Apply C10-012  masking tape to the OGV in area BH and adjacent areas where thermal spray is not permitted.
(2)Prepare the test specimens of similar material for the thermal spray coating application as follows:
(a)Put the test specimens in an area that will let them receive the same thickness of thermal spray coating as the OGV repair areas. Refer to paragraph 2.G.
(b)Make sure that you apply the buildup coating and the top coating to the test specimens.
(3)If necessary, apply thermal spray buildup coating to the OGV surface N in area BC, surface M in area BD, and diameter C in area BE. Refer to TASK 70-49-00-340-001 (THERMAL SPRAYING), TASK 70-49-50-340-049 (HIGH DENSITY HVOF RENE 80 COATING), and as follows:
(a)Apply the thermal spray buildup coating to a thickness of 0.003-0.070 inch (0.08-1.77 mm).
Subtask 72-41-20-220-066
(b)Make sure that after you apply the buildup thermal spray coating there is sufficient thickness margin to apply the top coating to a thickness of 0.0035-0.0075 inch (0.089-0.190 mm) after the final machining and still agree with the finish dimensions. Refer to Subtask 72-41-20-220-057 (paragraph 3.A.), Dimensional Information, Figure 901, Figure 903, and as follows:
1Diameter C must be in the range of 24.9550-24.9710 inches (633.857-634.263 mm) after you apply the buildup coating.
2Dimension J must be in the range of 5.8215-5.8275 inches (147.867-148.018 mm) after you apply the buildup coating.
3Dimension K must be in the range of 5.4735-5.4775 inches (139.027-139.128 mm) after you apply the buildup coating.
Subtask 72-41-20-340-002
(c)Overspray is not permitted during the application of the buildup coating.
(d)Do the quality assurance testing specified in TASK 70-49-50-340-049 (HIGH DENSITY HVOF RENE 80 COATING).
Subtask 72-41-20-340-003
(4)Apply thermal spray top coating to the OGV surface N in area BC, surface M in area BD, and diameter C in area BE. Refer to TASK 70-49-00-340-001 (THERMAL SPRAYING), TASK 70-49-43-340-042 (HIGH DENSITY HVOF T-800 (TRIBALOY) COATING), Subtask 72-41-20-220-057 (paragraph 3.A.), Dimensional Information, and as follows:
NOTE:
It is important that sufficient thermal spray coating is applied to make sure that the OGV agrees with the finish dimensions after final machining.
(a)The thickness of the thermal spray top coating must be in the range of 0.0035-0.0075 inch (0.089-0.190 mm) after final machining.
(b)Overspray is not permitted on area BH.
(c)Overspray is permitted on area BF, area BG, and area BJ if it agrees with the maximum permitted limit of 0.007 inch (0.17 mm).
Subtask 72-41-20-340-004
(5)Do all the quality assurance testing specified in TASK 70-49-50-340-049 (HIGH DENSITY HVOF RENE 80 COATING), and TASK 70-49-43-340-042 (HIGH DENSITY HVOF T-800 (TRIBALOY) COATING).
NOTE:
The bond strength test of this thermal spray coating system is a test of a specimen with the buildup coat and top coat applied to the test specimen.
Subtask 72-41-20-350-025
CAUTION:
DO NOT USE METALLIC INSTRUMENTS TO APPLY OR REMOVE THE MASKING TAPE. YOU CAN CAUSE DAMAGE TO THE OGV AND REDUCE THE FATIGUE LIFE OF THE PART IF YOU USE METALLIC INSTRUMENTS.
(6)Remove the masking tape as follows:
(a)Carefully pull the masking tape away from the thermal spray coating.
(7)If necessary, blend the OGV adjacent surfaces to remove the over-spray. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES), and Figure 903.
NOTE:
If the over-spray on area BF and area BJ agrees with the maximum permitted limit of 0.007 inch (0.17 mm), it is not necessary to remove the over-spray.
Subtask 72-41-20-340-007
WARNING:
DO NOT THERMAL SPRAY IF YOU ARE NOT APPROVED (TRAINED AND QUALIFIED). USE PERSONAL PROTECTION EQUIPMENT AND APPROVED SAFETY PROCEDURES. USE EITHER A CONTINUOUS-FLOW EXHAUST SYSTEM OR A WATER-CURTAIN EXHAUST SYSTEM. WATER-CURTAIN EXHAUST SYSTEMS MAY COLLECT OVERSPRAY PARTICLES OF SOME METALS (MAGNESIUM, ALUMINUM AND IRON) AND CAN FORM HYDROGEN. WHEN MIXED WITH AIR, HYDROGEN CAN BURN AND IS EXPLOSIVE.
I.A.Alternative Procedure. Thermal-spray the OGV repair surface in area BC, area BD, and diameter C in area BE, and as follows:
CAUTION:
DO NOT USE METALLIC INSTRUMENTS TO APPLY OR REMOVE THE MASKING TAPE. YOU CAN CAUSE DAMAGE TO THE OGV AND REDUCE THE FATIGUE LIFE OF THE PART IF YOU USE METALLIC INSTRUMENTS.
(1)Apply C10-012  masking tape to the OGV in area BH and adjacent areas where thermal spray is not permitted.
(2)Prepare the test specimens of similar material for the thermal spray coating application as follows:
(a)Put the test specimens in an area that will let them receive the same thickness of thermal spray coating as the OGV repair areas. Refer to paragraph 2.G.
(b)Make sure that you apply the buildup coating and the top coating to the test specimens.
(3)If necessary, apply thermal spray buildup coating to the OGV surface N in area BC, surface M in area BD, and diameter C in area BE. Refer to TASK 70-49-00-340-001 (THERMAL SPRAYING), TASK 70-49-56-340-803 (THERMAL SPRAYING - STANDARD PRACTICE - THERMAL SPRAYING RENE 80 COATING) , and as follows:
(a)Apply the thermal spray buildup coating to a thickness of 0.003-0.070 inch (0.08-1.77 mm).
Subtask 72-41-20-220-109
(b)Make sure that after you apply the buildup thermal spray coating, there is a sufficient thickness margin to apply the top coating to a thickness of 0.0035-0.0075 inch (0.089-0.190 mm) after the final machining and still agrees with the finish dimensions. Refer to Subtask 72-41-20-220-057 (paragraph 3.A.), Figure 901, Figure 903, and as follows:
1Diameter C must be in the range of 24.9550-24.9710 inches (633.857-634.263 mm) after you apply the buildup coating.
2Dimension J must be in the range of 5.8215-5.8275 inches (147.867-148.018 mm) after you apply the buildup coating.
3Dimension K must be in the range of 5.4735-5.4775 inches (139.027-139.128 mm) after you apply the buildup coating.
Subtask 72-41-20-340-008
(c)Overspray is not permitted during the application of the buildup coating.
(d)Do the quality assurance testing specified in TASK 70-49-56-340-803 (THERMAL SPRAYING - STANDARD PRACTICE - THERMAL SPRAYING RENE 80 COATING) .
Subtask 72-41-20-340-009
(4)Apply thermal-spray top coating to the OVG surface N in area BC, surface M in area BD, and diameter C in area BE. Refer to TASK 70-49-00-340-001 (THERMAL SPRAYING), TASK 70-49-30-340-031 (THERMAL SPRAYING COBALT-MOLYBDENUM-CHROMIUM-SILICON ALLOY (POWDER) - TRIBALOY 800), Subtask 72-41-20-200-057 (paragraph 3.A.), and as follows:
NOTE:
It is important that sufficient thermal spray coating is applied to make sure that the OGV agrees with the finish dimensions after final machining.
(a)The thermal spray coating thickness after the final machining must be 0.0035-0.0075 inch (0.089-0.190 mm).
NOTE:
After the final machining, a minimum of 0.0035 inch (0.089 mm) of thermal spray coating is necessary.
Subtask 72-41-20-340-010
(5)Do all the quality assurance testing specified in TASK 70-49-30-340-031 (THERMAL SPRAYING COBALT-MOLYBDENUM-CHROMIUM-SILICON ALLOY (POWDER) - TRIBALOY 800).
Subtask 72-41-20-350-086
CAUTION:
DO NOT USE METALLIC INSTRUMENTS TO APPLY OR REMOVE THE MASKING TAPE. YOU CAN CAUSE DAMAGE TO THE OGV AND REDUCE THE FATIGUE LIFE OF THE PART IF YOU USE METALLIC INSTRUMENTS.
(6)Remove the masking tape.
(7)If necessary, blend the OGV adjacent surfaces to remove the over-spray. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) and Figure 903.
NOTE:
If the over-spray on area BF, area BG, and area BJ agrees with the maximum permitted limit of 0.007 inch (0.17 mm), it is not necessary to remove the over-spray.
Subtask 72-41-20-320-007
J.Machine the OGV surface N in area BC, surface M in area BD, and diameter C in area BE. Refer to TASK 70-00-03-800-004 (MACHINING DATA), Subtask 72-41-20-220-057 (paragraph 3.A.), Dimensional Information, Figure 901, and as follows:
(1)Set-up the OGV for machining. Refer to Subtask 72-41-20-350-017 (paragraph 4.A.), Setup information.
(2)Machine the OGV surface N in area BC, surface M in area BD, and diameter C in area BE to the finish dimensions and as follows:
(a)The OGV must agree with the dimensional dimensions for runout of surface N in area BC.
Subtask 72-41-20-350-026
(3)If necessary, blend the OGV repair area. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES), and as follows:
(a)Blend the overspray at area BL to make a smooth transition from surface BE to the adjacent surface on diameter C with a maximum forward facing step of 0.0075 inch (0.190 mm).
(b)If necessary, blend the OGV to remove overspray that is not permitted.
(c)Break all sharp edges to 0.005-0.010 inch (0.13-0.25 mm).
Subtask 72-41-20-220-067
(4)Do a dimensional inspection of the OGV. Refer to TASK 70-31-00-220-001 (DIMENSIONAL INSPECTION), TASK 70-31-06-220-001 (MACHINED FEATURES SHOP-RUN TOLERANCES), and Subtask 72-41-20-220-057 (paragraph 3.A.), Dimensional Information.
(5)Remove the OGV from the machining fixture.
Subtask 72-41-20-160-005
K.Clean the OGV. Refer to TASK 72-41-20-100-801 (72-41-20, CLEANING 001).
Subtask 72-41-20-340-005
L.Do an inspection of the OGV as specified in TASK 70-49-00-340-001 (THERMAL SPRAYING) and TASK 70-49-43-340-042 (HIGH DENSITY HVOF T-800 (TRIBALOY) COATING), or in TASK 70-49-30-340-031 (THERMAL SPRAYING COBALT-MOLYBDENUM-CHROMIUM-SILICON ALLOY (POWDER) - TRIBALOY 800), and as follows:
(1)Use white light and 10X magnification.
(2)Blisters, chipping, cracks, flaking, spalling, or splatter of the coating compound are not permitted.
(3)Surface finish must be 120 microinches (3.0 micrometers) or better.
(4)A surface finish of 140 microinches (3.5 micrometers) is permitted on 10 percent of the circumference.
Subtask 72-41-20-350-027
M.If necessary, install the leaf seals, springs, and pins on the OGV. Refer to TASK 72-41-20-300-801 (72-41-20, REPAIR 001).
* * * FOR ALL
Figure 901   (Sheet 1 ) Stage 10 Outlet Guide Vane
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Figure 901   (Sheet 2 ) Stage 10 Outlet Guide Vane
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Figure 901   (Sheet 3 ) Stage 10 Outlet Guide Vane
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Figure 901   (Sheet 4 ) Stage 10 Outlet Guide Vane
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Figure 902   Machining Fixture
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Figure 903   (Sheet 1 ) Dimensions for T800 Coating
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Figure 903   (Sheet 2 ) Dimensions for T800 Coating