DOC AIRBUS | AMM A320FRemoval of the Aft Engine Mount Bolts (One at a time) [CFML]
TASK 71-22-11-000-805-A
Removal of the Aft Engine Mount Bolts (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 71-22-11-941-070-A
Subtask 71-22-11-020-066-A
(2) Remove the two screws (8), the washers (9) and the nuts (10).
(a) Visually examine the screws (8), the washers (9) and the nuts (10) for indication of damage.
1 If there are scratches, marks and/or other damage, reject the parts.
(3) Remove the locking plate system of one aft engine mount bolt.
(a) Remove the screw (1) that attaches the locking plate (2) to the retainer bracket (5).
(b) Remove the locking plate (2).
(c) Visually examine the screw (1) and the locking plate (2) for indication of damage.
1 If there are scratches, marks and/or other damage, reject the parts.
(4) Remove one aft engine mount bolt.
(a) Loosen the aft mount bolt (3) to remove the remaining torque.
(b) Remove and discard the aft mount bolt (3), the washer (4), the barrel nut (6) and its retainer (7).
(c) Visually examine the retainer bracket (5) for indication of damage.
1 If there are scratches, marks and/or other damage, reject the parts.
(d) Visually examine the engine mount hole for indication of damage. If there are scratches, marks and/or other damage, replace the aft engine mount (Ref. AMM TASK 71-22-11-000-804) and (Ref. AMM TASK 71-22-11-400-804).
[Rev.10 from 2021]
2026.04.02 07:32:12 UTC
Removal of the Aft Engine Mount Bolts (One at a time)
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:
YOU MUST NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY.
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 2M (6 FT) - ADJUSTABLE |
| No specific | 1 | FLASHLIGHT - HIGHPOWER |
| No specific | 1 | MIRROR - INSPECTION |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 71-22-11-000-804-A | Removal of the Aft Engine Mount |
| TASK 71-22-11-400-804-A | Installation of the Aft Engine Mount |
| TASK 78-30-00-040-809-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-36-00-010-806-A | Opening of the Thrust Reverser Cowl Doors |
Aft Engine Mount Bolts (One at a time)Subtask 71-22-11-941-070-A
A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put a WARNING NOTICE(S) in position to tell persons not to operate:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 71-22-11-010-105-A (1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put a WARNING NOTICE(S) in position to tell persons not to operate:
- The ENG/MODE selector switch
- The ENG/MASTER 1(2) control switch.
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 71-22-11-040-076-A (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
C. Deactivation of the Thrust Reverser System for Maintenance
Subtask 71-22-11-010-106-A 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 ground maintenance (Ref. AMM TASK 78-30-00-040-809). D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
4. Procedure(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
Subtask 71-22-11-020-066-A
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.
A. Removal of the Aft Engine Mount Bolts (One at a time) NOTE: This procedure is applicable to one aft engine mount bolt.
WARNING:
USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
(1) Remove the two cotter pins. (2) Remove the two screws (8), the washers (9) and the nuts (10).
(a) Visually examine the screws (8), the washers (9) and the nuts (10) for indication of damage.
1 If there are scratches, marks and/or other damage, reject the parts.
(3) Remove the locking plate system of one aft engine mount bolt.
(a) Remove the screw (1) that attaches the locking plate (2) to the retainer bracket (5).
(b) Remove the locking plate (2).
(c) Visually examine the screw (1) and the locking plate (2) for indication of damage.
1 If there are scratches, marks and/or other damage, reject the parts.
(4) Remove one aft engine mount bolt.
(a) Loosen the aft mount bolt (3) to remove the remaining torque.
(b) Remove and discard the aft mount bolt (3), the washer (4), the barrel nut (6) and its retainer (7).
(c) Visually examine the retainer bracket (5) for indication of damage.
1 If there are scratches, marks and/or other damage, reject the parts.
(d) Visually examine the engine mount hole for indication of damage. If there are scratches, marks and/or other damage, replace the aft engine mount (Ref. AMM TASK 71-22-11-000-804) and (Ref. AMM TASK 71-22-11-400-804).
NOTE: You can use a MIRROR - INSPECTION and FLASHLIGHT - HIGHPOWER.