Removal of the Turbine Rear Frame Vibration Sensor [CFMI]

TASK 77-31-30-000-001-A
Removal of the Turbine Rear Frame Vibration Sensor

FIN: 4003EV ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TRF Vibration Sensor

3. Job Set-up
Subtask 77-31-30-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 77-31-30-010-050-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 77-31-30-040-050-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 77-31-30-010-053-A ** ON A/C NOT FOR ALL

D. Open the left thrust-reverser door: (Ref. AMM TASK 78-36-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
451AL
(2) FOR [1000EM2] (ENGINE-2)
461AL

4. Procedure
Subtask 77-31-30-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the TRF Vibration Sensor
(1) Disconnect the harness from the TRF vibration sensor receptacle.
(2) Remove the parts which attach the TRF vibration sensor as follows:

REMOVE	FROM	NOTE
Nuts (30) Bolts (20)	Flange T	At the 11:30 o'clock position (Detail B)
Nut (50) Bolt (70) Clamp (40)	Bracket (60)	On flange T, at the 10:45 o'clock position (Detail C)
Nut (80) Bolt (110) Clamp (100)	Bracket (90)	On flange T, at the 10 o'clock position (Detail D)
Nut (120) Bolt (150) Clamp (140)	Bracket (130)	On the LPTACC tubes support, at the 9:45 o'clock position (Detail E)
Pre SB 72-022 Nut (170) Spacer (180) Bolt (200) Clamp (190)	Bracket (160)	On flange S, at the 10 o'clock position (Detail F) (configuration one)
Post SB 72-022 Nut (170) Bolt (200) Clamp (190) End SB 72-022	Bracket (160)	On flange S, at the 10 o'clock position (Detail F) (Configuration two)
Bolt (230) Clamp (220)	Bracket (210)	On flange R, at the 9:45 o'clock position (Detail G)
Nut (260) Bolt (240) Clamp (270)	Bracket (250)	On fuel nozzle, at the 9:45 o'clock position (Detail H)
Screws (300) Half-plates (280) TRF vibration sensor connector (10)	Bracket (290)	On flange P, at the 9:45 o'clock position (Detail J)

(3) Remove the TRF vibration sensor (10) from the engine.
(4) Put CAP - BLANKING on the disconnected parts.

[Rev.10 from 2021] 2026.04.02 07:41:15 UTC