DOC AIRBUS | AMM A320FRemoval of the Aft Vibration Sensor N1 [PW11]
TASK 77-32-22-000-801-A
Removal of the Aft Vibration Sensor N1
Use this procedure to remove the aft vibration sensor.
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 77-32-22-941-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:19:06 UTC
Removal of the Aft Vibration Sensor N1
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.
CAUTION:
MAKE SURE THAT THE AFT VIBRATION SENSOR CABLE DOES NOT TOUCH SHARP-EDGE SURFACES, FUEL LINES, OIL LINES, HIGH PRESSURE PNEUMATIC DUCTS, PNEUMATIC SENSOR LINES, OR FABRIC BELLOWS. MAKE SURE THAT THE AFT VIBRATION SENSOR CABLE DOES NOT HAVE ANY KINKS. IF YOU DO NOT FOLLOW THIS INSTRUCTION YOU COULD DAMAGE THE AFT VIBRATION SENSOR CABLE.
1. Reason for the JobUse this procedure to remove the aft vibration sensor.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | COVER - PROTECTION |
| No specific | 1 | PLIERS - JAWED, SOFT |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 437AL, 438AR, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 447AL, 448AR, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-860-832-A | Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC |
| TASK 71-13-00-010-802-A | Opening of the Fan Cowl Doors |
| 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 |
Aft Vibration SensorSubtask 77-32-22-941-050-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Do the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832).
Subtask 77-32-22-865-050-A ** ON A/C NOT FOR ALL (1) Do the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832).
B. Open, safety and tag these circuit breakers in this sequence:
Subtask 77-32-22-010-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1) | |||
| 121VU | PHMU/ENG1 | 95KS1 | P44 |
| FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2) | |||
| 121VU | PHMU/ENG2 | 95KS2 | P45 |
C. 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
Subtask 77-32-22-040-050-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
D. Deactivation of the Thrust Reverser for Maintenance
Subtask 77-32-22-010-051-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). E. Get Access
(1) Open the right thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR
4. Procedure(1) Open the right thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR
CAUTION:
WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
Subtask 77-32-22-020-050-A ** ON A/C NOT FOR ALL A. Removal of the Aft Vibration Sensor N1
(1) Find the aft vibration sensor (2) at the 3 o'clock position aft looking forward on the engine core.
(2) Remove the sensor (2) from the engine as follows:
(a) Disconnect the wiring harnesses (W03) connectors (P51) from the sensor (2) receptacle (J51) with the PLIERS - JAWED, SOFT. See the sheet 2 of the figure.
(b) Remove the two bolts (1) from the sensor (2) and the Flange H bracket.
(c) Remove the sensor (2) cable sleeves from the seven spring clips. See the sheets 3, 4 and 5 of the figure.
(d) Remove the two bolts (12) and nuts (13) from the sensor (2) and the Flange P bracket. See the sheet 5 of the figure.
(e) Remove the sensor (2) from the engine core.
(3) Installation of protection covers
(1) Find the aft vibration sensor (2) at the 3 o'clock position aft looking forward on the engine core.
(2) Remove the sensor (2) from the engine as follows:
(a) Disconnect the wiring harnesses (W03) connectors (P51) from the sensor (2) receptacle (J51) with the PLIERS - JAWED, SOFT. See the sheet 2 of the figure.
(b) Remove the two bolts (1) from the sensor (2) and the Flange H bracket.
(c) Remove the sensor (2) cable sleeves from the seven spring clips. See the sheets 3, 4 and 5 of the figure.
(d) Remove the two bolts (12) and nuts (13) from the sensor (2) and the Flange P bracket. See the sheet 5 of the figure.
(e) Remove the sensor (2) from the engine core.
(3) Installation of protection covers
CAUTION:
INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.
(a) Make sure that you install COVER - PROTECTION as necessary to prevent damage to the engine.