Installation of the Forward Vibration Sensor [PW11]

TASK 77-32-21-400-801-A
Installation of the Forward Vibration Sensor

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

ZONE: 400
FIN: 4068KS ** ON A/C NOT FOR ALL

1. Reason for the Job
A. Use this procedure to install the forward vibration sensor.
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	PLIERS - JAWED, SOFT
No specific	Torque wrench: range to between 16.5 and 12.5 lbf.in (0.19 and 0.14 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P03-001)	PWA 521 engine Oil
(Material No.P05-291)	safety cable
(Material No.P05-292)	safety cable ferrule

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL

D. Referenced Information

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 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 73-21-00-710-807-A	Test No.6 - EEC Operation Test (Idle Test)
TASK 73-25-34-400-802-A	Installation of the Engine Interface Unit (EIU)
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Installation of the Forward Vibration Sensor Config-2 Sensor Relocation Configuration

3. Job Set-up
Subtask 77-32-21-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did 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 77-32-21-865-051-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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

Subtask 77-32-21-010-052-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the fan cowl doors are open (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) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

Subtask 77-32-21-040-051-A ** ON A/C NOT FOR ALL

D. Deactivation of the Thrust Reverser for Maintenance

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) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 77-32-21-010-053-B ** ON A/C NOT FOR ALL

E. Get Access
POST SB C-72-00-0058A (Config-2 Sensor Relocation Configuration)
(1) Make sure that the left thrust-reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL.
END OF POST SB C-72-00-0058A (Config-2 Sensor Relocation Configuration)

Subtask 77-32-21-010-053-A

DELETED

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 77-32-21-420-050-B ** ON A/C NOT FOR ALL

A. Installation of the Forward Vibration Sensor

Installation of the Forward Vibration Sensor Config-2 Sensor Relocation Configuration ** ON A/C NOT FOR ALL

POST SB C−72−00−0058A (Config−2 Sensor Relocation Configuration)
(1) Removal of the protection covers:

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

(a) Make sure that you remove all the necessary COVER - PROTECTION.
(2) Install the forward vibration sensor (1) as follows:
(a) Find the bracket attached to flange E located at the 7 o'clock position.
(b) Apply the PWA 521 engine Oil (Material No.P03-001) on the threads of the three bolts (2).
(c) Install the forward vibration sensor (1) on the bracket with the three bolts (2).
(d) TORQUE the three bolts (2) to between 16.5 and 12.5 lbf.in (0.19 and 0.14 m.daN )

in an equal and opposite pattern until the same torque indication holds.

WARNING: USE GOGGLES WHEN YOU REMOVE OR INSTALL SAFETY CABLE. EACH TIME YOU CUT SAFETY CABLE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE SAFETY CABLE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

(e) Safety the three bolts (2) with the safety cable (Material No.P05-291) and the safety cable ferrule (Material No.P05-292) .
(3) Connect the wiring harness (W03) connector (P32) to the forward vibration sensor (1) receptacle (J32) as follows:
(a) Examine, align and engage the connector.
(b) Push lightly in on the connector while you tighten the coupling ring.
(c) Use the PLIERS - JAWED, SOFT and tighten the connector against the receptacle.
(d) While you tighten, push the connector in and from side to side.
(e) Make sure that you can feel the ratchet feature.
(f) Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(4) Examine the assembly for unwanted objects, damage and correct assembly.
END OF POST SB C−72−00−0058A (Config−2 Sensor Relocation Configuration)

5. Close-up
Subtask 77-32-21-410-051-B ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
POST SB C-72-00-0058A (Config-2 Sensor Relocation Configuration)
(2) Close the left thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL.
END OF POST SB C-72-00-0058A (Config-2 Sensor Relocation Configuration)

Subtask 77-32-21-860-050-A

DELETED

Subtask 77-32-21-440-050-A ** ON A/C NOT FOR ALL

C. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 77-32-21-410-050-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Make sure that all the circuit breakers shown in the paragraph Procedure of the engine interface unit installation are closed. If they are not, close them in the recommended sequence
(Ref. AMM TASK 73-25-34-400-802).

Subtask 77-32-21-865-052-A ** ON A/C NOT FOR ALL

E. Close this(these) circuit breaker(s):

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

Subtask 77-32-21-720-050-A ** ON A/C NOT FOR ALL

F. Tests
(1) Do the test N°6 - EEC - Idle test (Ref. AMM TASK 73-21-00-710-807).

[Rev.10 from 2021] 2026.04.01 03:19:05 UTC