Removal of the Pneumatic System Tubes and Hoses

TASK 36-11-49-000-006-A
Removal of the Pneumatic System Tubes and Hoses

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

ZONE: 453
ZONE: 463

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)-ADJUSTABLE
No specific	AR	COVER - PROTECTION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
453	HOT SECTION
463	HOT SECTION
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 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 71-13-00-010-040-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
Pneumatic System Tubes and Hoses

3. Job Set-up
Subtask 36-11-49-861-074-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 36-11-49-941-086-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that the engine 1(2) is shutdown for at least 5 minutes.
(2) On the AIR COND panel 30VU:

make sure that the 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),
put a WARNING NOTICE(S) to tell persons not to operate the pneumatic system.

(3) On the ENG panel 115VU:

put a WARNING NOTICE(S) to tell persons not to start the engine 1(2).

(4) On the HP ground connector:

put a WARNING NOTICE(S) to tell persons not to pressurize the pneumatic system.

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

make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton switch is off,
put a WARNING NOTICE(S) to tell persons not to energize FADEC 1(2).

Subtask 36-11-49-865-118-A ** ON A/C NOT FOR ALL

C. Open, safety and tag 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 36-11-49-010-112-A ** ON A/C NOT FOR ALL

D. Get access to the Engine 1(2)
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position.

Subtask 36-11-49-040-088-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-49-010-113-A ** ON A/C NOT FOR ALL

F. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 36-11-49-020-082-B ** ON A/C NOT FOR ALL

A. Removal of the Regulator Valve to Interface Hose Assembly
(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) Disconnect the hose assembly (55) from the engine tube.
(4) Disconnect the hose assembly (55) from the bleed Pressure Regulator Valve (PRV) (20).
(5) Put COVER - PROTECTION on the two ends of the hose assembly (55), the engine tube and the fitting on the PRV (20).
(6) Remove the hose assembly (55) from the engine.

Subtask 36-11-49-020-083-B ** ON A/C NOT FOR ALL

B. Removal of the Flexible Metal Pneumatic Hose Assembly
(1) Disconnect the hose assembly (65) from the engine tube.
(2) Disconnect the hose assembly (65) from the tube assembly (10).
(3) Put COVER - PROTECTION on the two ends of the hose assembly (65), the engine tube and the tube assembly (10).
(4) Remove the hose assembly (65) from the engine.
(5) Disconnect the hose assembly (50) from the engine tube.
(6) Disconnect the hose assembly (50) from the tube assembly (5).
(7) Put COVER - PROTECTION on the two ends of the hose assembly (50), the engine tube and the tube assembly (5).
(8) Remove the hose assembly (50) from the engine.

Subtask 36-11-49-020-085-B ** ON A/C NOT FOR ALL

C. Removal of the Tee Assembly to Hose Tube Assembly

NOTE: It is easier to remove the tube if the upper link is disconnected from the bracket on the engine flange.

(1) Remove the bolt (70), the washer (75), the bushing (80) and the nut (85) that attach the link (90) to the bracket on the engine flange STA215 (N).
(2) Disconnect the link (90) from the bracket on the engine flange STA215 (N).
(3) Disconnect the tube assembly (5) from the hose assembly (50).
(4) Remove the bolt (25), the washer (40) and the nut (35) that attach the clamps (30) to the bracket at flange STA221 (P).
(5) Remove the bolt (45), the washer (40) and the nut (35) that attach the clamps (30) to the bracket at flange STA221 (P).
(6) Remove the clamp (30) from the tube assembly (5). Leave the other clamp (30) on the tube (10).
(7) Remove the bolt (25), the washer (40) and the nut (35) that attach the clamp (30) to the bracket on the bleed air flange.
(8) Disconnect the tube assembly (5) from the union (60) on the mid stage tee duct.
(9) If necessary, remove the union (60) from the mid stage tee duct.
(10) Put COVER - PROTECTION on the two ends of the tube assembly (5), the hose assembly (50) and the union (60).
(11) Remove the tube assembly (5) from the engine.

Subtask 36-11-49-020-086-B ** ON A/C NOT FOR ALL

D. Removal of the IP/HP Override Tube Assembly

NOTE: To use the CFM56-5A engine on an A320 aircraft you must do Service Bulletin RA32036-4 which replaces this tube assembly with the HP bleed valve to pressure regulator valve tube assembly.

NOTE: It is easier to remove the tube if the upper link is disconnected from the bracket on the engine flange.

(1) Remove the bolt (70), the washer (75), the bushing (80) and the nut (85) that attach the link (90) to the bracket on the engine flange STA215 (N).
(2) Disconnect the link (90) from the bracket on the engine flange STA215 (N).
(3) Disconnect the hose assembly (65) from the tube assembly (10).
(4) Disconnect the tube assembly (10) from the bleed pressure regulator valve (20).
(5) Remove the bolt (25) and the washer (40) that attach the clamp (30) to the bracket at flange STA221 (P).
(6) Remove the clamp (30) from the tube assembly (10).
(7) Remove the bolt (45), the washer (40) and the nut (35) that attach the clamps (30) to the bracket at flange STA221 (P).
(8) Remove the clamp (30) from the tube assembly (10). Leave the other clamp (30) on the tube (5).
(9) Remove the bolt (25) and the washer (40) that attach the clamp (30) to the bracket at flange STA216 (N).
(10) Remove the clamp (30) from the tube assembly (10).
(11) Disconnect the tube assembly (10) from the HP bleed valve (15).
(12) Put COVER - PROTECTION on the two ends of the tube assembly (10), the hose assembly (65) and the fittings on the valves (15) and (20).
(13) Remove the tube assembly (10) from the engine.

[Rev.10 from 2021] 2026.04.01 12:38:50 UTC