Removal of the Bleed Bias Transducer [CFMI]

TASK 75-34-10-000-001-A
Removal 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	CAP - BLANKING
No specific	AR	PLIERS - JAWED, SOFT
No specific	AR	PLUG - BLANKING
No specific	AR	WARNING NOTICE(S)

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 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
BLEED BIAS Transducer Location

3. Job Set-up
Subtask 75-34-10-941-050-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). (2).

Subtask 75-34-10-010-050-A ** ON A/C NOT FOR ALL

B. Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 75-34-10-040-050-A ** ON A/C NOT FOR ALL

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

Subtask 75-34-10-010-051-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the thrust reverser doors: (Ref. AMM TASK 78-36-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

4. Procedure
Subtask 75-34-10-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Bleed Bias Transducer.
(1) Remove the one bolt (50) and one nut (120) from the tube clamps assemblies. Remove the tube clamps (60,80,90 and 110) and tube clamp sleeves (70 and 100) attached to the static pressure tube (20) and the total pressure tube (30) to the attachement bracket (130).
(2) Disconnect the total pressure tube (30) and the static pressure tube (20) from the Bleed Bias Transducer (10).
(3) Put PLUG - BLANKING on the tube ends and inlet ports of the Bleed Bias Transducer (10).
(4) Remove the 2 electrical leads (140 and 150) from the Bleed Bias Transducer (10). Use a PLIERS - JAWED, SOFT.
(5) Put CAP - BLANKING on the electrical lead ends and recepticals of the Bleed Bias Transducer (10).
(6) Remove the 4 bolts (40) that attach the Bleed Bias Transducer (10) to the attachment bracket.

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