Removal of the Aft Engine Mount [CFMI]

TASK 71-22-11-000-040-A
Removal of the Aft Engine Mount

CAUTION: THIS PART IS A REMOVABLE STRUCTURAL COMPONENT (RSC), WHICH CAN BE MOVED BETWEEN AIRCRAFT. THUS IT CAN HAVE DIFFERENT OPERATION CONDITIONS AND A DIFFERENT LIFE RECORD (FLIGHT HOURS/FLIGHT CYCLES/CALENDAR) FROM THE AIRCRAFT IT IS INSTALLED ON OR REMOVED FROM. THE OPERATOR IS RESPONSIBLE FOR THE SPECIFIC TRACKING AND CONTINUED AIRWORTHINESS OF REMOVABLE STRUCTURAL COMPONENTS. INCORRECT MAINTENANCE OF THESE COMPONENTS CAN CAUSE A RISK FOR THE FLIGHT SAFETY.

FIN: 1550KM1 ** ON A/C NOT FOR ALL
FIN: 1550KM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
RSE1224	2	SPLINT-ENGINE MOUNT AFT

B. Consumable Materials

REFERENCE	DESIGNATION
No specific	TY WRAP

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-000-040-A	Removal of the Power Plant
TASK 71-00-00-000-040-A-01	Removal of the Power Plant with the Engine Positioner TWW 75E
TASK 71-00-00-000-040-A-03	Removal of the Power Plant with Jacxson Tool
Aft Engine Mount

3. Job Set-up
Subtask 71-22-11-010-055-A ** ON A/C NOT FOR ALL

A. Remove the engine (Ref. AMM TASK 71-00-00-000-040).

4. Procedure
Subtask 71-22-11-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the aft Engine Mount.
(1) Remove retaining pin (85) from shear pin (45).
(2) Remove bolts (5), washers (10), (15) and nuts (20) that attach the outer retainers (25) and (30) to bracket (60).
(3) Remove outer retainers (25) and (30) from engine.
(4) Remove slotted spanner nuts (35) and (40) from shear bolt (50) and shear pin (45).
(5) Remove shear bolt (50) from shear pin (45).
(6) Remove shear pin (45), anti-rotation bracket (60), and bracket (75) from engine mount (80).
(7) Disengage engine aft mount (80) link assemblies from engine flanges and remove mount from engine.
(8) Remove bushing (55), shoulder bushing (65), and bushing (70) from engine.

Subtask 71-22-11-420-059-A ** ON A/C NOT FOR ALL

B. Installation of the AFT ENGINE MOUNT ANTI GOUGE SPLINTS.
(1) Put the top slint assemblies (larger) on the outside of the aft engine mount links.

NOTE: The end of the splint assembly marked TOP must touch the beam assembly. The other end marked BOTTOM must touch the links.

(2) Put the bottom splint (smaller) on the inside of the aft engine mount links.
(3) Attach the RSE1224 SPLINT-ENGINE MOUNT AFT to the engine mount two places with TY WRAP.
(a) Wind the TY WRAP around the splints and the aft mount where the splint touches the beam assembly.
(b) Wind the TY WRAP around the splints and the aft mount where the splint touches the link.
(c) Make sure that the TY WRAP is wound very tight and that the splints can not move.

[Rev.10 from 2021] 2026.04.01 12:54:57 UTC