Removal of the Aft Engine Mount [IAE]

TASK 71-22-11-000-010-A
Removal of the Aft Engine Mount

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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.

ZONE: 400
FIN: 1550KM ** ON A/C NOT FOR ALL

1. Reason for the Job
This TASK supplies the data to remove the Aft Engine Mount
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
IAE1N20015	1	SLING, AFT MOUNT

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.VU5-0023)	penetrating oil

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-20-000-040-A	Removal of the Power Plant
TASK 71-00-20-000-040-A-01	Removal of the Power Plant with the Engine Positioner TWW 75E (MIAG)
Aft Engine Mount

3. Job Set-up
Subtask 71-22-11-020-062-A ** ON A/C NOT FOR ALL

A. Remove the Power Plant
(1) Removal of the power plant (Ref. AMM TASK 71-00-20-000-040).

4. Procedure
Subtask 71-22-11-410-068-A ** ON A/C NOT FOR ALL

A. Attach the Aft engine mount sling

Aft Engine Mount ** ON A/C NOT FOR ALL

(1) Attach the IAE1N20015 SLING, AFT MOUNT (10) to a hoist and position over the aft engine mount (1).
(2) Attach the IAE1N20015 SLING, AFT MOUNT (10) to the aft engine mount (1) with two toll bolts (12) and washers (13). Tighten bolts.

NOTE: Use the two holes diagonally opposite of each other

(3) Raise the hoist to straighten the sling.

Subtask 71-22-11-010-068-A ** ON A/C NOT FOR ALL

B. Remove the aft engine mount.

Aft Engine Mount ** ON A/C NOT FOR ALL

CAUTION: THE AFT ENGINE MOUNT WEIGHS 81.6 LBS (37 KGS).

(1) Remove the nuts (9), washers (7) and (8), bolts (6) and retainers (5) from the link assemblies (2):
(a) Attach the points on the engine mount flange.
(2) Remove the inner pins (3) and the outer pins (4) from the link assemblies (2):
(a) Attach the points on the engine mount flange.
(b) If the pins are hard to remove:
1 Protect the engine and the surrounding equipment.
2 Apply penetrating oil (Material No.VU5-0023) or equivalent as many times necessary around the pins.
3 Wait for the product to penetrate as long as necessary.
4 Remove the inner pins (3) and the outer pins (4) from the link assemblies (2).
(c) If you still cannot remove the pins, contact Collins Aerospace for instructions.
(3) Remove the aft engine mount (1).

Subtask 71-22-11-010-069-A ** ON A/C NOT FOR ALL

C. Remove the Aft engine mount sling
(1) Remove the bolts (12) and washers (13) from the aft engine mount.

[Rev.10 from 2021] 2026.04.01 12:56:28 UTC