* * * FOR ALL
TASK 72-51-01-200-801
1 . General.
A.This procedure gives instructions to do an inspection of the HPT nozzle support (nozzle support).
•
(01-030 , 72-51-00) (SIN 172A1)
•
(01-031 , 72-51-00) (SIN 172A1) (SB 72-0095)
•
(01-032 , 72-51-00) (SIN 172A1) (SB 72-0155)
•
(01-032 , 72-51-00) (SIN 172A1) (SB 72-0294)
•
(01-032 , 72-51-00) (SIN 172A1) (SB 72-0359)
•
(01-032 , 72-51-00) (SIN 172A1) (SB 72-0379)
•
(01-032 , 72-51-00) (SIN 172A1) (SB 72-0380).
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. None.
C.Referenced Procedures.
 
ATA No.
Description
 
70-31-02
Acceptability Limits for Fluorescent-Penetrant Inspection
 
70-32-00
Indirect Inspection Methods
 
70-32-02
Fluorescent Penetrant Inspection
 
70-42-00
Blending and Removal of High Metal Procedures
D.Expendable Parts. None.
3 . Specific Inspection Procedure.
Subtask 72-51-01-350-030
A.If not removed during disassembly, remove and discard the old self-locking shank nut from the stage 1 nozzle assembly. Refer to 72-51-01-300-801 (72-51-01, REPAIR 001).
Subtask 72-51-01-230-001
B.Do an inspection of the nozzle support. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION), Figure 803, Figure 803A, and as follows:
(1)Use Class C penetrant.
(2)Refer to TASK 70-31-02-220-003 (ACCEPTABILITY LIMITS FOR FLUORESCENT-PENETRANT INSPECTION) and as follows:
(a)Use Class A limits.
(b)Minimum spacing 0.150 inch (3.81 mm).
(3)Microshrinkage severity limit must be class 30 maximum. Refer to the GEAE photo standard 8311253.
4 . Visual Inspection.
Subtask 72-51-01-220-104
A.Do a visual inspection of the nozzle support. Refer to Figure 801 and Figure 801A and as follows:
(1)Unless otherwise specified, visual inspection limits for size and spacing must be the same as the FPI criteria. Refer to Subtask 72-51-01-230-001 (paragraph 3.B.).
NOTE:
Microshrinkage must be evaluated by FPI only.
Subtask 72-51-01-220-001
B.Do an inspection of all body surfaces for:
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-51-01-300-808 (72-51-01, REPAIR 008).
Subtask 72-51-01-220-002
(2)Dents:
Maximum serviceable limit:
Two dents 0.250 inch (6.35 mm) diameter and 0.010 inch (0.25 mm) in depth.
Repair method:
Repair. Refer to TASK 72-51-01-300-808 (72-51-01, REPAIR 008).
Subtask 72-51-01-220-003
(3)Nicks and scratches:
Maximum serviceable limit:
Any amount, 0.010 inch (0.25 mm) in depth after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Repair method:
Repair. Refer to TASK 72-51-01-300-808 (72-51-01, REPAIR 008).
Subtask 72-51-01-220-004
(4)Buckles:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the nozzle support.
* * * FOR ALL
* * * PRE SB   72-0155( )
Figure 801   Nozzle Support - Visual Inspection
* * * FOR ALL
* * * SB   72-0155( PIP2 FINS (M46) New Material )
Figure 801A   Nozzle Support - Dimensional Inspection
Subtask 72-51-01-220-005
C.Do an inspection of the outer flange area for:
(1)Cracks from the load pin hole:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-51-01-300-804 (72-51-01, REPAIR 004) or TASK 72-51-01-300-810 (72-51-01, REPAIR 010) or TASK 72-51-01-300-814 (72-51-01, REPAIR 013) or TASK 72-51-01-300-815 (72-51-01, REPAIR 015) .
Subtask 72-51-01-220-006
(2)Radial cracks from the outer diameter:
Maximum serviceable limit:
Any amount, 0.05 inch (1.3 mm) in length, not intersecting load pin hole. 5.0 inches (127 mm) minimum between cracks.
Repair method:
Repair. Refer to TASK 72-51-01-300-804 (72-51-01, REPAIR 004) or TASK 72-51-01-300-810 (72-51-01, REPAIR 010) or TASK 72-51-01-300-814 (72-51-01, REPAIR 013) or TASK 72-51-01-300-815 (72-51-01, REPAIR 015) .
Subtask 72-51-01-220-007
(3)Dents:
Maximum serviceable limit:
Any amount, 0.010 inch (0.25 mm) in depth, 0.25 inch (6.4 mm) diameter after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Repair method:
Replace the nozzle support.
Subtask 72-51-01-220-008
(4)Nicks, scratches, and gouges:
Maximum serviceable limit:
Any amount, 0.010 inch (0.25 mm) in depth after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Maximum repairable limit:
Any amount, 0.020 inch (0.51 mm) in depth.
Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-51-01-220-009
(5)Wear or fretting on the load pin diameter:
Maximum serviceable limit:
0.005 inch (0.13 mm) on each pin.
Repair method:
Replace the nozzle support.
Subtask 72-51-01-220-010
(6)Wear or fretting on the stage 1 nozzle axial and radial support interface:
Maximum serviceable limit:
0.005 inch (0.13 mm) in depth.
Repair method:
Repair. Refer to TASK 72-51-01-300-808 (72-51-01, REPAIR 008).
Subtask 72-51-01-220-011
(7)Wear on the outer flange aft face:
Maximum serviceable limit:
0.020 inch (0.51 mm) in depth, if there are no sharp edges. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Maximum repairable limit:
Any amount, 0.020 inch (0.51 mm) in depth.
Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-51-01-220-103
(8)Cracks on the stage 1 nozzle radial support interface:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-51-01-300-808 (72-51-01, REPAIR 008).
Subtask 72-51-01-220-109
(9)Loose, damaged, or missing load pin:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-51-01-300-809 (72-51-01, REPAIR 009).
Subtask 72-51-01-220-012
D.Do an inspection of the forward flange, combustor flange interface, and aft inner flange for:
(1)Cracks from boltholes:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-51-01-300-808 (72-51-01, REPAIR 008).
Subtask 72-51-01-220-013
(2)Dents:
Maximum serviceable limit:
Any amount, 0.010 inch (0.25 mm) in depth, 0.25 inch (6.4 mm) diameter, after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Repair method:
Repair. Refer to TASK 72-51-01-300-808 (72-51-01, REPAIR 008).
Subtask 72-51-01-220-014
(3)Fretting in the bolthole:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount, if you can polish damaged areas to 125 microinches (3.2 micrometer).
Repair method:
Polish the bolthole counterbores. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-51-01-220-015
(4)Pitting, corrosion, or fretting:
Maximum serviceable limit:
0.030 inch (0.76 mm) in depth on one side, or not more than 0.030 inch (0.76 mm) total (cumulative) depth on both sides, of the flange in the same circumferential location after remaining silver is removed. Pitting is permitted on 10 percent of the total flange area, 6.5 sq in. (4193 sq mm) or the equivalent. Refer to TASK 70-21-04-120-001 (CLEANING METHOD 4 - DRY ABRASIVE BLAST CLEANING) , Method No. 4C, or TASK 70-21-05-120-002 (CLEANING METHOD 5 - WET ABRASIVE BLAST CLEANING) , Method No. 5B.
Repair method:
Replace the nozzle support.
Subtask 72-51-01-220-045
(5)Deleted.
Subtask 72-51-01-220-059
(6)Deleted.
Subtask 72-51-01-220-027
E.Do an inspection of the braze joints (inner and outer inducer support wall) for:
(1)Braze voids and cracks:
Maximum serviceable limit:
Through voids are not permitted. Indications must be 0.015 inch (0.38 mm) or less. The diameter or length of each void must not be more than 0.080 inch (2.03 mm). The minimum distance between adjacent voids or unbonded areas must be two times the size of the largest adjacent void or unbonded area. There must be three voids or unbonded areas or less for each 1.0 inch (25 mm) of braze material.
Repair method:
Repair. Refer to TASK 72-51-01-300-805 (72-51-01, REPAIR 005) .
Subtask 72-51-01-220-028
F.Do an inspection of the honeycomb for:
(1)Annular wear groove:
Maximum serviceable limit:
Two grooves 0.250 inch (6.35 mm) in width, 0.050 inch (1.27 mm) in depth.
Repair method:
Repair. Refer to TASK 72-51-01-300-802 (72-51-01, REPAIR 002).
Subtask 72-51-01-220-029
(2)Cell damage/erosion:
Maximum serviceable limit:
Any amount after the removal of loose honeycomb elements.
Repair method:
Repair. Refer to TASK 72-51-01-300-802 (72-51-01, REPAIR 002) or blend loose material. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) or an equivalent.
Subtask 72-51-01-220-030
(3)Missing cells/visible inducer parent material:
Maximum serviceable limit:
Any amount after the removal of loose honeycomb elements.
Repair method:
Repair. Refer to TASK 72-51-01-300-802 (72-51-01, REPAIR 002) or blend loose material. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) or an equivalent.
Subtask 72-51-01-220-031
G.Do an inspection of the bayonet surfaces for:
(1)Wear:
Maximum serviceable limit:
Any amount, if FINS dimension E and dimension FF are serviceable. Refer to Subtask 72-51-01-220-034 (paragraph 5.).
Repair method:
Repair. Refer to TASK 72-51-01-300-806 (72-51-01, REPAIR 006) .
Subtask 72-51-01-220-032
(2)Nicks, dents, scratches, or other damage:
Maximum serviceable limit:
Any amount, 0.005 inch (0.13 mm) in depth, after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Repair. Refer to TASK 72-51-01-300-806 (72-51-01, REPAIR 006) .
Subtask 72-51-01-220-061
H.Do an inspection of the inner diameter of the forward flange area. Refer to Figure 802 and as follows:
* * * PRE SB   72-0359
(1)Erosion in area CC:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit 1:
Any amount, 0.012 inch (0.30 mm) in depth, not less than 1.0 inch (25 mm) apart circumferentially after blend.
Repair method 1:
Blend to eliminate defect with 0.250 inch (6.35 mm) minimum blend radius. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit 2:
Any amount, 0.025 inch (0.63 mm) in depth and not less than 2.0 inches (50.8 mm) apart circumferentially after blend.
Repair method 2:
Blend to eliminate defect with 0.250 inch (6.35 mm) minimum blend radius. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Apply the hard coat to area CC, refer to SB 72-0359.
Maximum repairable limit 3:
Any amount.
Repair method 3:
Repair. Refer to TASK 72-51-01-300-807 (72-51-01, REPAIR 007).
* * * END PRE SB   72-0359
Subtask 72-51-01-220-085
* * * SB   72-0359
(1).A.Erosion in area CC:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Repair. Refer to TASK 72-51-01-300-807 (72-51-01, Repair 007).
* * * END SB   72-0359( )
Subtask 72-51-01-220-075
(2)Deleted.
Subtask 72-51-01-220-076
* * * SB   72-0359
(3)Missing, eroded or damage hard coat in area BC:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Deleted.
Repair method:
Repair. Refer to TASK 72-51-01-300-811 (72-51-01, REPAIR 011).
* * * END SB   72-0359
Subtask 72-51-01-220-095
* * * PRE SB   72-0359
(4)Erosion in area AC (only between forward flange and area CC):
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit 1:
Any amount, 0.012 inch (0.30 mm) in depth, not less than 1.0 inch (25 mm) apart circumferentially after blend.
Repair method 1:
Blend to eliminate defect with 0.250 inch (6.35 mm) minimum blend radius. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit 2:
Any amount.
Repair method 2:
Repair. Refer to TASK 72-51-01-300-807 (72-51-01, REPAIR 007).
* * * END PRE SB   72-0359
Subtask 72-51-01-220-110
* * * SB   72-0359
(4).A.Erosion in area AC (only between forward flange and area BC):
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit 1:
Any amount, 0.012 inch (0.30 mm) in depth, not less than 1.0 inch (25 mm) apart circumferentially after blend.
Repair method 1:
Blend to eliminate defect with 0.250 inch (6.35 mm) minimum blend radius. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit 2:
Any amount.
Repair method:
Repair. Refer to TASK 72-51-01-300-807 (72-51-01, REPAIR 007).
* * * END SB   72-0359
Subtask 72-51-01-220-120
I.Do an inspection of the inducer surfaces for:
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-51-01-300-812 (72-51-01, REPAIR 012).
Subtask 72-51-01-220-128
* * * PRE SB   72-0155
(2)Scratches on the inducer surface outer diameter (OD):
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Not repairable.
Repair method:
Replace the nozzle support.
* * * END PRE SB   72-0155
Subtask 72-51-01-220-129
* * * SB   72-0155( PIP2 FINS (M46) New Material )
(3)Scratches on the inducer surfaces outer diameter (OD), excluding fillet radius to radial surface, chamfer area and bypass holes (understand as area of 0.050 inch (1.27 mm) around the bypass holes edges):
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount, if you can remove the damage with a blend of 0.010 inch (0.25 mm) in depth.
Repair method:
Blend to eliminate defect and create a smooth profile. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
* * * END SB   72-0155( PIP2 FINS (M46) New Material )
  Subtask 72-51-01-220-131
  (4)Wear or erosion on the inducer exit hole:
  Maximum serviceable limit:
Any amount, if the wall thickness dimension AM is a minimum of 0.050 inch (1.27 mm), after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
  Maximum repairable limit:
Not repairable.
  Repair method:
Replace the nozzle support.
* * * FOR ALL
* * * PRE SB   72-0155
Figure 802   (Sheet 1 ) Nozzle Support - Forward Flange Inspection Area
* * * FOR ALL
* * * SB   72-0155
Figure 802   (Sheet 2 ) Nozzle Support - Forward Flange Inspection Area
* * * FOR ALL
Figure 802   (Sheet 3 ) Nozzle Support - Forward Flange Inspection Area
5 . Dimensional Inspection.
Refer to Figure 803 and Figure 803A.
Subtask 72-51-01-220-034
A.With surface A restrained within 0.002 inch (0.05 mm) and diameter B restrained within tolerance all dimensions must be met.
B.Measure the diameter at six equally spaced locations to find the average diameter.
C.Measure the dimension at eight equally spaced locations to find the average dimension.
D.Record the average diameter and average dimension. Include the clock positions where they were measured.
* * * FOR ALL
Figure 803   Nozzle Support - Dimensional Inspection
* * * FOR ALL
Figure 803A   Nozzle Support - Dimensional Inspection
Subtask 72-51-01-220-035
E.Do an inspection of the nozzle support for:
(1)Diameter AA:
Minimum serviceable limit:
25.528 inches (648.41 mm).
Maximum serviceable limit:
25.544 inches (648.81 mm).
Repair method:
Repair. Refer to TASK 72-51-01-300-803 (72-51-01, REPAIR 003) and/or TASK 72-51-01-300-813 (72-51-01, REPAIR 014).
Subtask 72-51-01-220-122
(2)Runout at diameter AA:
Maximum serviceable limit:
0.010 inches (0.25 mm).
Repair method:
Repair. Refer to TASK 72-51-01-300-803 (72-51-01, REPAIR 003).
Subtask 72-51-01-220-036
(3)Diameter BA:
Minimum serviceable limit:
23.584 inches (599.03 mm).
Maximum serviceable limit:
23.598 inches (599.38 mm).
Repair method:
Repair. Refer to TASK 72-51-01-300-803 (72-51-01, REPAIR 003).
Subtask 72-51-01-220-123
(4)Runout at diameter BA:
Maximum serviceable limit:
0.008 inches (0.20 mm).
Repair method:
Repair. Refer to TASK 72-51-01-300-804 (72-51-01, REPAIR 004) or Refer to TASK 72-51-01-300-815 (72-51-01, REPAIR 015) .
Subtask 72-51-01-220-037
(5)Diameter CA:
Minimum serviceable limit:
18.697 inches (474.91 mm).
Maximum serviceable limit:
18.707 inches (475.15 mm).
Repair method:
Repair. Refer to TASK 72-51-01-300-803 (72-51-01, REPAIR 003).
Subtask 72-51-01-220-038
(6)Runout of surface DA (surface A restrained flat within 0.002 inch (0.05 mm)):
Maximum serviceable limit:
0.006 inch (0.15 mm).
Repair method:
Repair. Refer to TASK 72-51-01-300-803 (72-51-01, REPAIR 003).
Subtask 72-51-01-220-039
(7)Dimension E (if wear observed, measure in worn area):
Minimum serviceable limit:
0.096 inch (2.44 mm).
Maximum serviceable limit:
0.104 inch (2.64 mm).
Repair method:
Repair. Refer to TASK 72-51-01-300-806 (72-51-01, REPAIR 006) . If dimension E is outside the serviceable limit, the part can be still used, provided alternative inspection criteria for wear on the bayonets are met. Refer to Subtask 72-51-01-220-077 (paragraph 5.F.) .
Subtask 72-51-01-220-040
(8)Dimension FF (it can be measured directly from surface A to the tab mating surface (fwd face), or indirectly with the max length from FINS forward flange to back side of the bayonet tab minus the tab thickness (dimension E)):
Minimum serviceable limit:
8.747 inches (222.17 mm).
Maximum serviceable limit:
8.757 inches (222.42 mm).
Repair method:
If dimension FF is outside the serviceable limit, the part can be still used, provided alternative inspection criteria for wear on the bayonets are met. Refer to Subtask 72-51-01-220-077 (paragraph 5.F.) . If dimension FF continues outside the serviceable limit, repair. Refer to TASK 72-51-01-300-803 (72-51-01, REPAIR 003) .
Subtask 72-51-01-220-041
(9)Dimension H:
Minimum serviceable limit:
9.641 inches (244.88 mm).
Maximum serviceable limit:
9.661 inches (245.39 mm).
Repair method:
Repair. Refer to TASK 72-51-01-300-803 (72-51-01, REPAIR 003).
Subtask 72-51-01-220-060
(10)Diameter B:
Minimum serviceable limit:
16.4035 inches (416.65 mm).
Maximum serviceable limit:
16.4085 inches (416.78 mm).
  Repair method:
Repair. Refer to TASK 72-51-01-300-803 (72-51-01, REPAIR 003).
Subtask 72-51-01-220-124
(11)Measure dimension G:
Minimum serviceable limit:
9.318 inches (236.68 mm).
Maximum serviceable limit:
9.333 inches (237.05 mm).
Repair method:
Replace the nozzle support.
Subtask 72-51-01-220-125
(12)Measure dimension D:
Minimum serviceable limit:
0.507 inches (12.87 mm).
Maximum serviceable limit:
0.523 inches (13.28 mm).
Repair method:
Repair. Refer to TASK 72-51-01-300-804 (72-51-01, REPAIR 004).
Subtask 72-51-01-220-077
F.Alternative dimensional inspection criteria for bayonets. Measure dimension FF (in worn area) and dimension G for each affected bayonet tab that is outside standard inspection limits, refer to Subtask 72-51-01-220-039 (paragraph 5.E.(5)) and/or Subtask 72-51-01-220-040 (paragraph 5.E.(6)). Take measurement at corresponding circumferential location as affected tab. The Subtask 72-51-01-220-034 (paragraph 5.C.) in Dimensional Inspection (average dimension) is not valid for special inspection described by this paragraph. If dimension E and/or dimension FF are outside the serviceable limits, do as follows:
(1)Deleted.
Subtask 72-51-01-220-078
(2)Calculate dimension J, refer to Figure 803 for dimension definition, and as follows:
(a)Dimension J = Dimension G - Dimension FF.
(b)If dimension J is more than 0.560 inch (14.22 mm), dimension E and dimension FF are outside the serviceable limits, is acceptable.
Subtask 72-51-01-350-031
G.Install new self-locking shank nuts in the stage 1 nozzle assembly. Refer to TASK 72-51-01-300-801 (72-51-01, REPAIR 001).