Removal of the Forward Engine Mount [IAE]

TASK 71-21-12-000-011-A
Removal of the Forward 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: 1500KM ** ON A/C NOT FOR ALL

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

REFERENCE	QTY	DESIGNATION
IAE1N20014	2	SLING, FWD MOUNT

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V10-058)	Penetrating oil

C. 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)
Forward Engine Mount

3. Job Set-up
Subtask 71-21-12-020-053-A ** ON A/C NOT FOR ALL

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

Subtask 71-21-12-020-054-A ** ON A/C NOT FOR ALL

B. Remove the threaded parts and parts with an interface fit
(1) Apply Penetrating oil (Material No.V10-058) before the removal of threaded parts and parts with an interface fit. Let the parts soak before removal.

Subtask 71-21-12-020-055-A ** ON A/C NOT FOR ALL

C. Remove and discard the lockwire
(1) Remove and discard the lockwire before parts are disconnected or removed.

4. Procedure
Subtask 71-21-12-410-062-A ** ON A/C NOT FOR ALL

A. Attach the forward mount sling and mounting plate.

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

(1) Attach IAE1N20014 SLING, FWD MOUNT (16) to a hoist and position over the forward engine mount (1).
(2) Remove the four nuts and two washers from the mounting plate.
(3) Position the sling mounting plate on the forward engine mount (1) and insert the four bolts thru the side holes. Make sure the plate is aligned properly.
(4) Place two washers and two nuts on the rear bolts and nuts only on the front bolts. Tighten the nuts.
(5) Raise the hoist to straighten the sling.

Subtask 71-21-12-010-063-A ** ON A/C NOT FOR ALL

B. Remove the Forward engine mount

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

(1) Remove the nuts (5) and (8), washers (3), (6), (7) and (9), bolts (2) and (10) and retainers (11) and (13) from the link assemblies (4) at the engine brackets.
(2) Remove the pins (12) from the link assemblies (4).
(3) Remove the bolts (15) and washers (14) that attach the forward engine mount (1) to the forward mount tube.
(4) Remove the forward engine mount (1).

Subtask 71-21-12-010-064-A ** ON A/C NOT FOR ALL

C. Remove the forward engine mount sling and mounting plate
(1) Remove the nuts, washers and bolts from the mounting plate.
(2) Remove IAE1N20014 SLING, FWD MOUNT (16) and mounting plate from the forward engine mount (1).
(3) Replace the bolts, washers and nuts on the mounting plate.

[Rev.10 from 2021] 2026.04.01 02:30:15 UTC