* * * FOR ALL
TASK 72-30-01-100-801
1 . General.
A.This procedure gives instructions to clean the HPC rear extension case (extension case) (080AL). Refer to Figure 601.
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
 
70-21-02
Vapor Degreasing
 
70-21-03
Steam Cleaning
 
70-21-04
Dry Abrasive Blast Cleaning
 
70-21-05
Wet Abrasive Blast Cleaning
 
70-21-06
Heavy-Duty Alkaline Cleaner (Without Inhibited Phosphoric Acid)
 
70-21-14
Manually-Assisted Detergent Cleaning
 
70-21-20
Four-Step Alkaline Cleaning and Acidic Descaling (With Inhibited Phosphoric Acid)
D.Expendable Parts. None.
* * * FOR ALL
Figure 601   Extension Case
3 . General Cleaning.
Subtask 72-30-01-110-001
A.Alternative Procedures Available. Vapor clean the extension case. Refer to TASK 70-21-02-110-002 (CLEANING METHOD 2 - VAPOR DEGREASING).
Subtask 72-30-01-160-001
A.A.Alternative Procedure. Steam clean the extension case. Refer to TASK 70-21-03-160-001 (CLEANING METHOD 3 - STEAM CLEANING).
Subtask 72-30-01-120-001
A.B.Alternative Procedure. Abrasive blast clean the extension case. Refer to TASK 70-21-04-120-001 (CLEANING METHOD 4 - DRY ABRASIVE BLAST CLEANING).
Subtask 72-30-01-110-002
A.C.Alternative Procedure. Heavy-duty alkaline clean the extension case. Refer to TASK 70-21-06-110-004 (CLEANING METHOD 6 - HEAVY-DUTY ALKALINE CLEANER (WITHOUT INHIBITED PHOSPHORIC ACID)).
Subtask 72-30-01-110-003
A.D.Alternative Procedure. Manually clean the extension case. Refer to TASK 70-21-14-110-012 (CLEANING METHOD 14 - MANUALLY-ASSISTED DETERGENT CLEANING).
Subtask 72-30-01-110-007
A.E.Alternative Procedure. Four step alkaline clean the extension case. Refer to TASK 70-21-20-110-038 (CLEANING METHOD 20 - FOUR-STEP ALKALINE CLEANING AND ACIDIC DESCALING (WITH INHIBITED PHOSPHORIC ACID)).
Subtask 72-30-01-120-003
A.F.Alternative Procedure. Wet abrasive blast clean the extension case 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).