Installation of the Bleed Transferred Pressure-Transducer

TASK 36-11-15-400-802-A
Installation of the Bleed Transferred Pressure-Transducer

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

ZONE: 415
ZONE: 425
FIN: 7HA1 ** ON A/C NOT FOR ALL
FIN: 7HA2 ** 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 4M (13 FT)-ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.85 and 0.73 m.daN (75.22 and 64.60 lbf.in )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
415	LOWER PYLON
425	LOWER PYLON
191DB
FOR [7HA1] (XDCR-BLEED TRANSFER PRESS, ENG 1)
415BL
FOR [7HA2] (XDCR-BLEED TRANSFER PRESS, ENG 2)
425BL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
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 24-41-00-862-002-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 36-11-00-740-802-A	BITE Test of the Engine Bleed Air System (EBAS) (System Test)
TASK 49-00-00-860-009-A	APU Shutdown by External Power (131-9(A))
TASK 49-00-00-860-009-A-01	APU Shutdown by Batteries (131-9(A))
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
Bleed Transferred Pressure-Transducer

3. Job Set-up
Subtask 36-11-15-861-057-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-15-860-056-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(2) On AIR COND panel 30VU:
(a) Make sure that the ENG 1(2) BLEED pushbutton switch is released (OFF legend on).
(b) Make sure that the APU BLEED pushbutton switch is released (ON legend off).
(c) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the pneumatic system.
(3) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(4) On the access door 191DB, on the HP ground connector:
(a) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.

Subtask 36-11-15-010-061-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position at the pylon access panels.
(2) Make sure that these access panels are removed:
(a) FOR [7HA1] (XDCR-BLEED TRANSFER PRESS, ENG 1)
415BL
(b) FOR [7HA2] (XDCR-BLEED TRANSFER PRESS, ENG 2)
425BL

Subtask 36-11-15-865-058-A ** ON A/C NOT FOR ALL

D. 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: 7HA1 (XDCRBLEED TRANSFER PRESS, ENG 1)
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
FOR FIN: 7HA2 (XDCRBLEED TRANSFER PRESS, ENG 2)
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

4. Procedure
Subtask 36-11-15-420-055-A ** ON A/C NOT FOR ALL

A. Installation of the Bleed Transferred Pressure-Transducer
(1) If you use the APU to energize the electrical circuits, stop the APU:

For GTCP 36-300 APU (Ref. AMM D/O 49-00-00-86)
For APS 3200 APU (Ref. AMM D/O 49-00-00-86)
For 131-9(A) APU (Ref. AMM TASK 49-00-00-860-009).

(2) In the cockpit, on the SD bleed page:
(a) Make sure that the pressure and the temperature of the bleed-air duct system are in ambient conditions.

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

WARNING: DO NOT TOUCH THE UNIT UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

(3) Do a visual inspection and clean the component interface and/or the adjacent area.
(4) Install the transducer (7) in the clamps (4):
(a) Make sure that you install the protective Teflon parts with the clamps (4).
(5) Put the transducer (7) and the clamps (4) in its position on the bracket (3).
(6) Install the washers (5) and the bolts (6).
(7) Tighten the bolts (6).
(8) Remove the PLUG-BLANKING from each disconnected line end.
(9) Connect the duct (1) to the transducer (7) and tighten it.

NOTE: Use a second wrench to hold the union when you disconnect/connect the pneumatic sense lines on the union.

(10) TORQUE the nut of the duct (1) to between 0.85 and 0.73 m.daN (75.22 and 64.60 lbf.in )

.
(11) Put a red line between the nut of the duct (1) and the transducer (7) (Ref. AMM TASK 20-23-22-910-001).
(12) Remove the CAP-BLANKING from each electrical connector and receptacle.
(13) Make sure that the electrical connector (2) is clean and in the correct condition.
(14) Connect the electrical connector (2) to the transducer (7).

Subtask 36-11-15-865-059-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 7HA1 (XDCRBLEED TRANSFER PRESS, ENG 1)
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
FOR FIN: 7HA2 (XDCRBLEED TRANSFER PRESS, ENG 2)
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 36-11-15-710-052-A ** ON A/C NOT FOR ALL

C. Do the BITE test of the engine bleed air system (EBAS) (Ref. AMM TASK 36-11-00-740-802).

5. Close-up
Subtask 36-11-15-410-059-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) Install these access panels:
(a) FOR [7HA1] (XDCR-BLEED TRANSFER PRESS, ENG 1)
415BL
(b) FOR [7HA2] (XDCR-BLEED TRANSFER PRESS, ENG 2)
425BL
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 36-11-15-862-056-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 01:08:15 UTC