* * * FOR ALL
TASK 72-31-43-100-801
1 . General.
A.This procedure gives instructions to clean the HPC rotor stage 3-4 spool (spool).
•
Spool (01-730 , 72-31-00) (SIN 050B4)
•
Spool (01-731 , 72-31-00) (SIN 050B4) SB 72-0051.
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
 
70-00-99
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
 
70-21-14
Manually-Assisted Detergent Cleaning
D.Expendable Parts. None.
3 . General Cleaning.
Refer to Figure 601 and Figure 601A.
Subtask 72-31-43-160-004
A.Alternative Procedure Available. Steam clean the spool. Refer to TASK 70-21-03-160-001 (70-21-03 Cleaning Method No. 3 - Steam Cleaning).
* * * FOR ALL
* * * PRE SB   72-0051( Ti-17 Stage 3 and 4 Spool )
Figure 601   Spool
* * * FOR ALL
* * * SB   72-0051( Ti 6-2-4-2 Stage 3 and 4 Spool )
Figure 601A   Spool
Subtask 72-31-43-110-004
A.A.Alternative Procedure. Manually clean the spool. Refer to TASK 70-21-14-110-012 (70-21-14 Cleaning Method No. 14 - Manually-Assisted Detergent Cleaning).
Subtask 72-31-43-110-005
A.B.Alternative Procedure. Do a light-duty alkaline cleaning of the spool. Refer to TASK 70-21-09-110-007 (CLEANING METHOD 9 - LIGHT-DUTY ALKALINE CLEANING OF TITANIUM ALLOYS).
Subtask 72-31-43-120-003
A.C.Alternative Procedure. Dry abrasive blast clean the spool. Refer to TASK 70-21-04-120-E01 (DRY ABRASIVE BLAST CLEANING METHOD 4E).
Subtask 72-31-43-120-004
A.D.Alternative Procedure. Wet abrasive blast clean the spool 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).
Subtask 72-31-43-350-002
B.Remove the coating from the spool. Refer to Repair.