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TASK 72-30-73-200-801
1 . General.
A.This procedure gives instructions to do an inspection of the HPC stage 4 actuating ring bridges (bridges) (071E4, 071E9):
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
 
70-32-02
Fluorescent Penetrant Inspection
 
70-32-03
Spot-Fluorescent-Penetrant Inspection
 
70-42-00
Blending and Removal of High Metal Procedures
D.Expendable Parts. None.
3 . Specific Inspection Procedure.
Subtask 72-30-73-230-001
A.If you think indications found in the visual inspection are cracks, do a fluorescent penetrant inspection as follows:
(1)Alternative Procedure Available. Do a Class A fluorescent penetrant inspection. Refer to TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION).
Subtask 72-30-73-230-002
(1).A.Alternative Procedure. Do a spot-fluorescent-penetrant inspection. Refer to TASK 70-32-03-230-002 (SPOT-FLUORESCENT-PENETRANT INSPECTION).
4 . Visual Inspection.
Refer to Figure 801.
Subtask 72-30-73-220-001
A.Do an inspection of all areas for:
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the bridge.
Subtask 72-30-73-220-002
(2)Nicks, dents, and scratches:
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) .
Maximum repairable limit:
Any amount, 0.010 inch (0.25 mm) in depth.
Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Do an inspection. Refer to TASK 70-32-03-230-002 (SPOT-FLUORESCENT-PENETRANT INSPECTION) .
Subtask 72-30-73-220-003
(3)Wear or grooves around the boltholes on the outer surface:
Maximum serviceable limit:
Any amount, up to 0.030 inch (0.76 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:
Replace the bridge.
Subtask 72-30-73-220-004
(4)Wear or rubbing on the inner surface:
Maximum serviceable limit:
Any amount, 0.030 inch (0.76 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:
Replace the bridge.
Subtask 72-30-73-220-009
(5)Wear, galling, or fretting in area A (area around the torque shaft attachment clevis holes (dia. D) on the VSV actuator mating face). Refer to Figure 801.
Maximum serviceable limit:
Any amount, up to 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:
Replace the bridge.
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Figure 801   (Sheet 1 ) HPC Stage 4 Actuating Ring Bridges - Inspection
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Figure 801   (Sheet 2 ) HPC Stage 4 Actuating Ring Bridges - Inspection
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Figure 801   (Sheet 3 ) HPC Stage 4 Actuating Ring Bridges - Inspection
5 . Special Dimensional Inspection.
Refer to Figure 801.
NOTE:
Do this special dimensional inspection only if a visual inspection or other defect condition makes a dimensional inspection necessary.
Subtask 72-30-73-220-005
A.Diameter D:
Minimum serviceable limit:
0.4375 inch (11.113 mm).
Maximum serviceable limit:
0.4381 inch (11.128 mm).
Repair method:
Replace the bridge.
Subtask 72-30-73-220-006
B.Diameter G:
Minimum serviceable limit:
0.299 inch (7.59 mm).
Maximum serviceable limit:
0.301 inch (7.65 mm).
Repair method:
Replace the bridge.
Subtask 72-30-73-220-007
C.Diameter H:
Minimum serviceable limit:
0.440 inch (11.18 mm).
Maximum serviceable limit:
0.460 inch (11.68 mm).
Repair method:
Replace the bridge.
Subtask 72-30-73-220-008
D.Diameter J:
Minimum serviceable limit:
0.339 inch (8.61 mm).
Maximum serviceable limit:
0.349 inch (8.86 mm).
Repair method:
Replace the bridge.