Installation of the Crossbleed Valve

TASK 36-12-52-400-001-A
Installation of the Crossbleed Valve

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

FIN: 6HV

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)- ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.78 and 0.56 m.daN (69.03 and 49.56 lbf.in )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
192FB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 36-12-00-710-001-A	Operational Test of the APU Bleed Air Supply and Crossbleed Systems
Crossbleed Valve 6HV ** ON A/C NOT FOR ALL
Crossbleed Valve 6HV ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 36-12-52-860-052-A

A. Aircraft Maintenance Configuration
(1) Make sure that the WARNING NOTICE(S) are 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) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below the access panel 192FB.
(3) Make sure that the access panel 192FB is open.

Subtask 36-12-52-865-051-A

B. 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
** ON A/C ALL
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22
** ON A/C ALL
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

4. Procedure
Subtask 36-12-52-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Crossbleed Valve
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Remove the blanking caps from the pneumatic duct flanges (4) and (8).
(4) Check the pneumatic duct flanges (4) and (8) for correct condition.
(5) Install the crossbleed valve (2) between the pneumatic duct flanges (4) and (8) with the actuator motors to the A/C centerline.
(6) Install the clamps (3) and (7).
(7) TORQUE the nuts (5) and (6) to between 0.78 and 0.56 m.daN (69.03 and 49.56 lbf.in )

.
(8) Put the bonding strap (10) in its installation position and install the screw (9), the washer (11) and the nut (12).
(9) Remove the blanking caps from the electrical connector (1) and from the receptacle.
(10) Make sure that all the electrical connections are clean and in the correct condition.
(11) Connect the electrical connector (1) to the crossbleed valve (2).

Subtask 36-12-52-420-050-B ** ON A/C NOT FOR ALL

.
(8) Put the bonding strap (10) in its installation position and install the screw (9), the washer (11) and the nut (12).
(9) Install the muff (13).
(10) Remove the blanking caps from the electrical connector (1) and from the receptacle.
(11) Make sure that all the electrical connections are clean and in the correct condition.
(12) Connect the electrical connector (1) to the crossbleed valve (2).

Subtask 36-12-52-865-052-A

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
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
** ON A/C ALL
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22
** ON A/C ALL
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 36-12-52-710-050-A

C. Do this Test
(1) Do the operational test of the APU Bleed Air-Supply and Crossbleed Systems (Ref. AMM TASK 36-12-00-710-001).
(2) Make sure that there are no leaks in the installation area.

5. Close-up
Subtask 36-12-52-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel 192FB.

Subtask 36-12-52-942-052-A

B. Put the aircraft back to its initial configuration.
(1) Remove the access platform(s).
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 04:09:45 UTC