DOC AIRBUS | AMM A320FRemoval of the Forward Mount Bolt (One at a time) [PW11]
TASK 71-21-41-000-807-A
Removal of the Forward Mount Bolt (One at a time)
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 71-21-41-941-066-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:57:32 UTC
Removal of the Forward Mount Bolt (One at a time)
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING:
ALWAYS USE APPLICABLE GLOVES TO TOUCH HOT PARTS. HOT PARTS CAN CAUSE INJURY TO PERSONS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 1M(3 FT) |
| No specific | 1 | FLASHLIGHT - HIGHPOWER |
| No specific | 1 | MIRROR - INSPECTION |
| 98D71203013000 | 1 | TORQUE WRENCH SET PW |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-860-833-A | Procedure to Prevent Engine Motoring |
| TASK 71-13-00-010-802-A | Opening of the Fan Cowl Doors |
| TASK 71-21-41-000-805-A | Removal of the Forward Mount Assembly |
| TASK 71-21-41-400-805-A | Installation of the Forward Mount Assembly |
| TASK 78-30-00-040-805-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-36-00-010-802-A | Opening of the Thrust Reverser Cowl-Doors |
Forward Mount BoltSubtask 71-21-41-941-066-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
Subtask 71-21-41-010-091-A ** ON A/C NOT FOR ALL (1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.
Subtask 71-21-41-040-066-A ** ON A/C NOT FOR ALL (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.
C. Deactivation of the Thrust Reverser for Maintenance
Subtask 71-21-41-010-092-A ** ON A/C NOT FOR ALL WARNING:
YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805). D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR
4. Procedure(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR
WARNING:
REMOVE THE SCREWS ONE BY ONE. DO NOT REMOVE MORE THAN ONE SCREW AT THE SAME TIME. IF YOU DO, THERE IS A RISK THAT THE ENGINE WILL FALL AND CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
Subtask 71-21-41-020-063-A ** ON A/C NOT FOR ALL A. Removal of the Forward Engine Mount Bolts (One at a time)
(a) Remove the screw (7) that attaches the locking plate (8) to the retainer (11).
(b) Remove the locking plate (8).
(c) Visually examine the screw (7) and the locking plate (8) for indication of damage.
(a) Loosen the bolt (9) to remove the remaining torque.
1 Visually examine the screws (5) and the retainer (1) for indication of damage.
(d) Visually examine the retainers (4) and (11) for indication of damage. If there are scratches, marks and/or other damage, reject the parts.
(e) Visually examine the engine mount hole for indication of damage.
NOTE: This procedure is applicable to one Forward engine mount bolt.
(1) Remove the Locking Plate system of one forward Engine Mount. (a) Remove the screw (7) that attaches the locking plate (8) to the retainer (11).
(b) Remove the locking plate (8).
(c) Visually examine the screw (7) and the locking plate (8) for indication of damage.
- If there are scratches, marks and/or other damage, reject the parts.
(a) Loosen the bolt (9) to remove the remaining torque.
NOTE: Use the tool 98D71203013000 TORQUE WRENCH SET PW to loosen the bolts.
(b) Remove the two screws (5) and the retainer (1). 1 Visually examine the screws (5) and the retainer (1) for indication of damage.
- If there are scratches, marks and/or other damage, reject the parts.
(d) Visually examine the retainers (4) and (11) for indication of damage. If there are scratches, marks and/or other damage, reject the parts.
(e) Visually examine the engine mount hole for indication of damage.
- If there are scratches, marks and/or other damage, remove the forward engine mount (Ref. AMM TASK 71-21-41-000-805) and (Ref. AMM TASK 71-21-41-400-805).
NOTE: You can use a MIRROR - INSPECTION and a FLASHLIGHT - HIGHPOWER.