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TASK 72-31-42-100-801
1 . General.
A.This procedure gives instructions to clean the stage 2 blisk (blisk). Refer to Figure 601.
•
Blisk (01-740 , 72-31-00) (SIN 056A2)
•
Blisk (02-740 , 72-31-00) (SIN 056A2) (SB 72-0157).
B.Use the 11C4482   lift fixture to position, lift, or turn the blisk in the working area. Refer to Subtask 72-31-42-420-002 (paragraph 4.A.) for instructions about installation and removal of the tool.
2 . Tools, Equipment, and Materials.
NOTE:
You can use equivalent alternatives for tools, equipment, and consumable materials.
A.Tools and Equipment.
(1)Special Tools.
 
Tool No.
Description
 
11C4482G02
Fixture, Lift/Turn - HP Compressor Rotor, Stage 2 Blisk (lift fixture)
 
9429M77G04
Fixture, Lift and Turn - General Purpose (lift/turn fixture)
(2)Standard Tools and Equipment. None.
(3)Locally Manufactured Tools. None.
B.Consumable Materials.
 
Code No.
Description
 
C04-116
Rice Hulls (Rice Hulls)
 
C04-153
Abrasive, Plastic (Plastic Abrasive)
C.Referenced Procedures.
 
ATA No.
Description
 
70-00-99
Wet Abrasive Blasting - Aluminum Oxide 500 Grit
 
70-21-03
Steam Cleaning
 
70-21-04
Dry Abrasive Blast Cleaning
 
70-21-05
Wet Abrasive Blast Cleaning
 
70-21-09
Light-Duty Alkaline Cleaning of Titanium Alloys
 
70-21-22
Light Duty Aqueous Cleaning
D.Expendable Parts. None.
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Figure 601   Blisk - Cleaning
3 . General Cleaning.
Subtask 72-31-42-160-001
WARNING:
BECAUSE OF ENGINE OPERATION, THE AIRFOIL TIPS CAN HAVE SHARP EDGES AND CORNERS. BE CAREFUL AND USE APPROPRIATE PROTECTIVE EQUIPMENT TO PREVENT INJURY.
A.Alternative Procedures Available. Steam clean the blisk. Refer to TASK 70-21-03-160-001 (CLEANING METHOD 3 - STEAM CLEANING).
Subtask 72-31-42-110-001
A.A.Alternative Procedure. Alkaline clean the blisk. Refer to TASK 70-21-09-110-007 (CLEANING METHOD 9 - LIGHT-DUTY ALKALINE CLEANING OF TITANIUM ALLOYS).
Subtask 72-31-42-120-001
A.B.Alternative Procedure. Dry abrasive blast clean the blisk with C04-116  Rice Hulls. Refer to TASK 70-21-04-120-B01 (Dry Abrasive Blast Cleaning Method 4B).
Subtask 72-31-42-120-002
A.C.Alternative Procedure. Dry abrasive blast clean the blisk with C04-153  Plastic Abrasive. Refer to TASK 70-21-04-120-E01 (DRY ABRASIVE BLAST CLEANING METHOD 4E).
Subtask 72-31-42-110-002
A.D.Alternative Procedure. Light duty aqueous clean the blisk. Refer to TASK 70-21-22-110-042 (CLEANING METHOD 22 - LIGHT DUTY AQUEOUS CLEANING (METHOD 1)).
Subtask 72-31-42-120-004
A.E.Alternative Procedure. Wet abrasive blast clean the blisk with 500 grit aluminum oxide. Refer to TASK 70-21-05-120-B02 (WET ABRASIVE BLAST CLEANING METHOD 5B) and TASK 70-00-99-801-054 (S1054 - WET ABRASIVE BLASTING - ALUMINUM OXIDE 500 GRIT).
4 . Tool Installation and Removal.
Subtask 72-31-42-420-002
A.Install the 11C4482   lift fixture. Refer to Figure 602 and do as follows:
(1)Turn the knobs (item 15) and the screw knobs (item 5) counterclockwise (CCW) to make sure that the supports (item 12) are open.
(2)Install the supports (item 12) on the blisk.
(3)Install the clamps (item 13) on the other side of the blisk.
(4)Make sure that the clamps (item 13) are aligned with the supports (item 12).
(5)Tighten the knobs (item 15) to set the supports (item 12) and hand-tighten the knobs (item 15) clockwise (CW) until the supports (item 12) and clamps (item 13) are tightly held in place.
(6)Install the 9429M77   lift/turn fixture as follows:
(a)Put the lock plate adapter (item 13) on the trunnion (item 6) and attach it with the release pin (item 19).
(7)Use the 9429M77   lift/turn fixture to move the 11C4482   lift fixture.
Subtask 72-31-42-020-002
B.Remove the 11C4482   lift fixture. Refer to Figure 602 and do as follows:
(1)Remove the 9429M77   lift/turn fixture from the 11C4482   lift fixture as follows:
(a)Remove the release pin (item 19) and lock plate adapter (item 13) from the 11C4482   lift fixture.
(2)Turn the knobs (item 15) and screw knobs (item 5) CCW to open the set of supports (item 12) and clamps (item 13).
(3)Remove the 11C4482   lift fixture from the blisk.
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Figure 602   (Sheet 1 ) Installation/Removal of the Lift Fixture, 11C4482, on the Blisk
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Figure 602   (Sheet 2 ) Installation/Removal of the Lift Fixture, 11C4482, on the Blisk