Installation of the No. 4 Bearing Pressure Transducer [IAE]

TASK 79-33-16-400-010-A
Installation of the No. 4 Bearing Pressure Transducer

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

ZONE: 400
FIN: 4005EN ** 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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )
No specific	Torque wrench: range to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-124)	Isopropyl Alcohol, Technical grade
(Material No.V02-147)	lockwire
(Material No.V10-077)	lubricant (engine oil)
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-23-15-912-010-A	Connection of Electrical Connectors
TASK 71-00-00-710-012-B	Test No.3 : Idle Leak Check
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 73-25-34-710-042-A	Operational Test of the EIU with the CFDS
No. 4 Bearing Pressure Transducer

3. Job Set-up
Subtask 79-33-16-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

Subtask 79-33-16-010-051-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-010)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 79-33-16-110-050-A ** ON A/C NOT FOR ALL

A. Clean the No. 4 bearing pressure transducer.

WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

(1) Remove the applicable covers/caps/plugs from the openings.
(2) Make a clear Textile-Lint free Cotton - (Material No.14SBA1) moist with V01-124Isopropyl Alcohol, Technical grade. Use the cloth to clean the No. 4 bearing pressure transducer mounting bracket or the far case flange.

Subtask 79-33-16-210-050-A ** ON A/C NOT FOR ALL

B. Inspection of the Transducer Mounting Bracket:

No. 4 Bearing Pressure Transducer ** ON A/C NOT FOR ALL

(1) Make sure that the mounting bracket has no cracks or damage.
(2) For Pre SB 71-0222, make sure that the self-locking clipnuts are safetied to the mounting bracket.

Subtask 79-33-16-420-050-A ** ON A/C NOT FOR ALL

WARNING: DO NOT LET ENGINE OIL STAY ON YOUR SKIN FOR A LONG TIME. FLUSH THE OIL FROM YOUR SKIN WITH WATER. THE OIL IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY.

C. Installation of the No. 4 bearing pressure transducer.

No. 4 Bearing Pressure Transducer ** ON A/C NOT FOR ALL

PRE SB 71-0222

(1) Align the bolt holes in the transducer flange with the threaded holes in the clipnuts of the bracket.
(2) Lubricate the threads on the bolts (2) with clean V10-077lubricant (engine oil) and attach the No. 4 bearing pressure transducer to the bracket with the bolts.
(3) TORQUE the bolts to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

(Ref. AMM TASK 70-23-11-911-013)

End of PRE SB 71-0222

POST SB 71-0222

(4) Align the bolt holes in the transducer flange with the holes in the bracket.
(5) Lubricate the threads on the bolts (2) with clean V10-077lubricant (engine oil) and attach the No. 4 bearing pressure transducer to the bracket with the bolts and double hex self-locking nuts.
(6) TORQUE the bolts to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

End of POST SB 71-0222

Subtask 79-33-16-420-051-A ** ON A/C NOT FOR ALL

D. Install the oil tube.

No. 4 Bearing Pressure Transducer ** ON A/C NOT FOR ALL

(1) Connect the tube (4) to the transducer.
(2) TORQUE the tube coupling nut to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )

(Ref. AMM TASK 70-23-11-911-013)
(3) Safety the nut to the bracket with the lockwire (Material No.V02-147)
(4) Connect the electrical connector 4005EN-A (1) to the transducer

No. 4 Bearing Pressure Transducer ** ON A/C NOT FOR ALL

and (Ref. AMM TASK 70-23-15-912-010)

5. Close-up
Subtask 79-33-16-410-050-A ** 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.
(2) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Remove the WARNING NOTICE(S).

Subtask 79-33-16-790-050-B ** ON A/C NOT FOR ALL

B. Do this test:
(1) Do an idle leak check (Ref. AMM TASK 71-00-00-710-012).
(2) Do an operational test of the EIU (Ref. AMM TASK 73-25-34-710-042). Then on the CFDS see if there are faults concerning No. 4 bearing pressure transducer.

[Rev.10 from 2021] 2026.04.02 06:39:56 UTC