Installation of the Bleed-Air Precooler Exchanger Inlet

TASK 36-11-44-400-001-A
Installation of the Bleed-Air Precooler Exchanger Inlet

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

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 70 and 50 lbf.in (0.79 and 0.57 m.daN )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
413DT
413CL, 413DL, 414CR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR
423CL, 423DL, 424CR
423DT

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
15	SEAL	AIPC 36-11-06-01-315
3	SEAL	AIPC 36-11-06-01-320

D. 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 24-41-00-862-002-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 36-12-00-860-001-A	Pressurization of the Bleed System with the APU
TASK 36-12-00-860-002-A	Pressurization of the Bleed System through the HP Ground Connector
TASK 49-00-00-860-006-A	APU Shutdown by External Power
TASK 49-00-00-860-006-A-01	APU Shutdown by Batteries
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 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
Bleed-Air Precooler Exchanger Inlet ** ON A/C NOT FOR ALL
Bleed-Air Precooler Exchanger Inlet ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 36-11-44-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that engine 1(2) is shutdown for a minimum of five minutes before you do this procedure.
(3) In the cockpit, on AIR COND panel 30VU:

Make sure that ENG 1(2) BLEED pushbutton-switch is released (the OFF legend is on).
Make sure that the APU BLEED pushbutton-switch is released (the ON legend is off).
Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the pneumatic system.

(4) On ENG panel 115VU:

Make sure that the WARNING NOTICE(S) is in position to tell persons not to start engine 1(2).

(5) On the HP ground connector:

Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.

(6) On the ENG section of maintenance panel 50VU:

Make sure that the ON legend of ENG/FADEC GND PWR 1(2) pushbutton-switch is off.
Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

(7) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the engine.

Subtask 36-11-44-010-056-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 36-11-44-010-056-B ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-010):
(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 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 36-11-44-010-056-C ** ON A/C NOT FOR ALL

Subtask 36-11-44-040-050-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-44-040-050-B ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).

Subtask 36-11-44-010-053-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that these access panels are removed:
(a) FOR [1000EM1] (ENGINE-1)
413CL 414CR 413DL
(b) FOR [1000EM2] (ENGINE-2)
423CL 424CR 423DL.

Subtask 36-11-44-010-053-C ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the access panel is removed:
(a) FOR [1000EM1] (ENGINE-1)
413DT
(b) FOR [1000EM2] (ENGINE-2)
423DT.

Subtask 36-11-44-865-052-A ** ON A/C NOT FOR ALL

E. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22

4. Procedure
Subtask 36-11-44-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Inlet of the Bleed-Air Precooler Exchanger
(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 TASK 49-00-00-860-006)
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) Remove the PLUG-BLANKING from each disconnected line end.
(4) Put the inlet (9) of the bleed-air precooler exchanger (2) in position on the spar (6).
(5) Install the clamp (8) and TORQUE it to between 70 and 50 lbf.in (0.79 and 0.57 m.daN )

.
(6) Install the plates (10) and (7).
(7) Install and tighten the eleven screws (11).
(8) Install the washers (5) and the screws (4).
(9) Tighten the screws (4).
(10) Install the new AIPC 36-11-06-01-320 SEAL (3) and AIPC 36-11-06-01-315 SEAL (15) on the bleed-air precooler exchanger (2).
(11) Install the bleed-air precooler exchanger (2) on the inlet (9) with its new seal (3) with the handles (13) and (14).
(12) Install the clamps (1) and (12) and tighten them.

Subtask 36-11-44-720-050-A ** ON A/C NOT FOR ALL

B. Do this Test
(1) Pressurize the bleed system through the HP ground connector (Ref. AMM TASK 36-12-00-860-002) or with the APU (Ref. AMM TASK 36-12-00-860-001).
(2) On the panel 30VU, set the X-BLEED selector to OPEN.
(3) If you pressurize the bleed system through the HP ground connector, the supplied pressure of 30 psi (2.07 bar) must be stable.
(4) Make sure that there are no leaks at the junctions upstream and downstream of the precooler exchanger on the related engine.

5. Close-up
Subtask 36-11-44-865-053-A ** ON A/C NOT FOR ALL

A. 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
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22

Subtask 36-11-44-410-050-A ** ON A/C NOT FOR ALL

B. Install these access panels:
(1) FOR [1000EM1] (ENGINE-1)
413CL 414CR 413DL
(2) FOR [1000EM2] (ENGINE-2)
423CL 424CR 423DL.

Subtask 36-11-44-410-050-C ** ON A/C NOT FOR ALL

B. Install the access panel:
(1) FOR [1000EM1] (ENGINE-1)
413DT
(2) FOR [1000EM2] (ENGINE-2)
423DT.

Subtask 36-11-44-410-051-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-44-440-051-A ** ON A/C NOT FOR ALL

D. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 36-11-44-410-051-B ** ON A/C NOT FOR ALL

E. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 36-11-44-440-051-B ** ON A/C NOT FOR ALL

F. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 36-11-44-410-054-A ** ON A/C NOT FOR ALL

G. Close Access
(1) 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.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

Subtask 36-11-44-410-054-B ** ON A/C NOT FOR ALL

G. Close Access
(1) 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.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

Subtask 36-11-44-410-054-C ** ON A/C NOT FOR ALL

Subtask 36-11-44-862-051-A ** ON A/C NOT FOR ALL

H. 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 12:38:05 UTC