Removal of the Bellows

TASK 36-12-42-000-001-A
Removal of the Bellows

WARNING: PUT WARNING NOTICES IN THE COCKPIT BEFORE YOU DO WORK ON THE BLEED AIR SYSTEM TO TELL PERSONS:

NOT TO OPERATE THE ENGINES
NOT TO OPERATE THE SLATS
NOT TO OPERATE THE APU SWITCH.

FIN: 7265HM ** 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	1	ACCESS PLATFORM 3M (10 FT)
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
Bellows (7265HM)

3. Job Set-up
Subtask 36-12-42-865-050-A ** ON A/C NOT FOR ALL

A. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
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
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20

Subtask 36-12-42-860-050-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Put the WARNING NOTICE(S) in position:

in the cockpit on the Engine Control Panel 115VU to tell persons not to start the engine(s),
in the cockpit on the AIR COND Overhead Control Panel 30VU to tell persons not to push in the APU BLEED pushbutton switch,
on the HP ground connector to tell persons not to pressurize the pneumatic system.

(2) Put the ACCESS PLATFORM 3M (10 FT) in position below the access door 312AR.
(3) Open the access door 312AR.

4. Procedure
Subtask 36-12-42-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Bellows (7265HM)

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

(1) Remove the sleeve (2), if installed.
(2) Remove the clamp (3).
(3) Loosen the clamps (4) and (6).
(4) Carefully remove the bellows (5) from between the duct sections (1) and (7).
(5) Put a CAP - BLANKING on the open ends of the duct sections (1) and (7).

[Rev.10 from 2021] 2026.04.01 01:15:32 UTC