* * * FOR ALL
TASK 72-21-06-100-801
1 . General.
A.This procedure gives instructions to clean the forward engine mount yoke (05-010 , 72-21-00). Refer to Figure 601 or Figure 601A.
B.Before you do this procedure, read the Cleaning Engine Parts section. Refer to TASK 70-20-00-100-001 (70-20-00, Cleaning Engine Parts) .
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.
 
Code No.
Description
 
C04-035
Solvent, General (Isopropyl Alcohol)
 
C10-173
Brush, Wire Stainless Steel (Brush)
 
C10-182
Cloth, Cleaning For Aircraft Structural (Cloth)
C.Referenced Procedures.
 
ATA No.
Description
 
70-00-99
Wet Abrasive Blasting - Aluminum Oxide 500 Grit
 
70-20-00
Cleaning Engine Parts
 
70-21-03
Steam Cleaning
 
70-21-04
Dry Abrasive Blast Cleaning
 
70-21-05
Wet Abrasive Blast Cleaning
D.Expendable Parts. None.
* * * FOR ALL
Figure 601   Forward Engine Mount Yoke - 12 Bolthole Mount Bolt Configuration
* * * FOR ALL
Figure 601A   Forward Engine Mount Yoke - 16 Bolthole Mount Bolt Configuration
3 . General Cleaning.
Subtask 72-21-06-110-001
WARNING:
ALCOHOL IS FLAMMABLE AND TOXIC TO SKIN, EYES, AND RESPIRATORY TRACT. SKIN AND EYE PROTECTION IS REQUIRED. AVOID REPEATED OR PROLONGED CONTACT. USE IN WELL VENTILATED AREA.
A.Alternative Procedures Available. Clean the forward engine mount yoke as follows:
(1)Clean the forward engine mount yoke with a (C10-173)   Brush and C04-035   Isopropyl Alcohol.
NOTE:
The forward engine mount yoke must be free of rust, corrosion, dirt, grease, oil, and other contaminants.
(2)Rinse the forward engine mount yoke with clean (C04-035)   Isopropyl Alcohol.
WARNING:
USE PROTECTIVE EQUIPMENT TO GUARD EYES AND FACE WHEN USING COMPRESSED AIR. MAXIMUM ALLOWABLE AIR PRESSURE IS 30 PSIG (207 KPA). DO NOT DIRECT AIR STREAM TOWARD YOURSELF OR OTHER PERSONNEL.
(3)Dry the forward engine mount yoke with (C10-182)   Cloth or clean, dry, oil-free, compressed air.
Subtask 72-21-06-160-001
A.A.Alternative Procedure. Steam clean the forward engine mount yoke. Refer to TASK 70-21-03-160-001 (CLEANING METHOD 3 - STEAM CLEANING).
Subtask 72-21-06-120-001
A.B.Alternative Procedure. Dry abrasive blast clean the engine mount yoke. Refer to TASK 70-21-04-120-E01 (DRY ABRASIVE BLAST CLEANING METHOD 4E).
Subtask 72-21-06-120-002
A.C.Alternative Procedure. Wet abrasive blast clean the engine mount yoke 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).