Installation of the Bleed Bias Transducer [CFMI]

TASK 75-34-10-400-001-A
Installation of the Bleed Bias Transducer

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** 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 1M(3 FT)
No specific	AR	PLIERS - JAWED, SOFT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 111 and 101 lbf.in (1.25 and 1.14 m.daN )
No specific	Torque wrench: range to between 145 and 135 lbf.in (1.64 and 1.53 m.daN )
No specific	Torque wrench: range to between 290 and 270 lbf.in (3.28 and 3.05 m.daN )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 71-00-00-710-006-A	Minimum Idle Check
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 73-29-00-710-040-A	Operational Test of the FADEC on the ground (with Engine Motoring)
TASK 73-29-00-710-040-A-01	FADEC Ground Test Without the CFDS
TASK 73-29-00-710-040-A-02	Operational Test of the FADEC on the Ground (with Engine non Motoring)
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
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors

3. Job Set-up
Subtask 75-34-10-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the 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).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

Subtask 75-34-10-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open: (Ref. AMM TASK 78-36-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 75-34-10-040-051-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 75-34-10-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Bleed Bias Transducer.
(1) Align the Bleed Bias Transducer (10) to the attachment bracket. Install and hand tighten the 4 bolts (40). Do not torque the bolts at this time.
(2) Install the tube clamps (60, 80, 90 and 110) around the Sleeves (70 and 100). Install the 1 bolt (50) thru the clamps (60, 80, 90 and 110) into the attachment bracket (130). Do not torque at this time.
(3) TORQUE the 4 bolts (40) to between 111 and 101 lbf.in (1.25 and 1.14 m.daN )

.
(4) Remove the blancking caps from the Transducer (10) and the electric leads (140 and 150).
(5) Install the longest lead of the J15 harness to the aft connector of the Bleed Bias Transducer (10). Use a PLIERS - JAWED, SOFT.
(6) Install the shorter lead of the J15 harness to the fwd connector of the Bleed Bias Transducer (10). Use a PLIERS - JAWED, SOFT.
(7) Install the static pressure tube (20) and the total pressure tube (30) finger tight on to the Bleed Bias Transducer. Do not torque the bolts at this time.
(8) TORQUE the large B-nut on the static pressure tube (20) to between 290 and 270 lbf.in (3.28 and 3.05 m.daN )

.
(9) TORQUE the small B-nut on the total pressure tube (30) to between 145 and 135 lbf.in (1.64 and 1.53 m.daN )

Subtask 75-34-10-410-050-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl doors: (Ref. AMM TASK 78-36-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(3) Remove the WARNING NOTICE(S).

Subtask 75-34-10-861-050-A ** ON A/C NOT FOR ALL

C. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 75-34-10-710-050-A ** ON A/C NOT FOR ALL

D. Do this test:
(1) Do a FADEC ground test (Ref. AMM TASK 73-29-00-710-040).
(2) Do a minimum idle check and a check for leaks (Ref. AMM TASK 71-00-00-710-006).

Subtask 75-34-10-862-050-A ** ON A/C NOT FOR ALL

E. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

5. Close-up
Subtask 75-34-10-410-051-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 cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.02 06:36:57 UTC