Removal of the Fan Air Valve (FAV)

TASK 36-11-54-000-803-A
Removal of the Fan Air Valve (FAV)

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

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: ALWAYS USE APPLICABLE GLOVES TO TOUCH HOT PARTS. HOT PARTS CAN CAUSE INJURY TO PERSONS.

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

ZONE: 471
ZONE: 481
FIN: 7120HM1 ** ON A/C NOT FOR ALL
FIN: 7120HM2 ** 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 2M (6 FT) - ADJUSTABLE
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
471	PYLON LEADING EDGE
481	PYLON LEADING EDGE
191DB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR
FOR [9HA1] (VALVE-FAN AIR, ENG1)
415AR
FOR [9HA2] (VALVE-FAN AIR, ENG2)
425AR

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 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
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
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
Fan Air Valve (FAV)
FOR [9HA1] (VALVE-FAN AIR, ENG1)
TASK 54-51-21-000-802-A	Removal of the Pylon Lateral Access-Doors
FOR [9HA2] (VALVE-FAN AIR, ENG2)
TASK 54-51-21-000-802-A	Removal of the Pylon Lateral Access-Doors

3. Job Set-up
Subtask 36-11-54-861-061-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 36-11-54-941-063-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:

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

(3) Do 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:

Put a WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.

(5) On FLAPS panel 114VU:
(a) Put the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
(6) Put a WARNING NOTICE(S) on the flap/slat control lever to tell persons not to operate the flap/slat controls.

Subtask 36-11-54-865-067-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 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 36-11-54-010-074-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 36-11-54-040-063-A ** ON A/C NOT FOR ALL

E. Deactivation of the Thrust Reverser for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 36-11-54-010-075-A ** ON A/C NOT FOR ALL

F. Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR
(3) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the engine.

Subtask 36-11-54-010-109-A ** ON A/C NOT FOR ALL

G. Get Access
(1) Remove access door:
(a) FOR [9HA1] (VALVE-FAN AIR, ENG1)

415AR (Ref. AMM TASK 54-51-21-000-802).

(b) FOR [9HA2] (VALVE-FAN AIR, ENG2)

425AR (Ref. AMM TASK 54-51-21-000-802).

4. Procedure
Subtask 36-11-54-020-061-B ** ON A/C NOT FOR ALL

A. Removal of the FAV
(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 (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) Carefully remove the nut (20), bonding strap (19), bolt (17) and washer (18) from the FAV (5).
(4) Remove the bolt (2), the plate (3) from the FAV actuator (1) and the FAV actuator rod (4).

NOTE: The plate (3) stays attached to the FAV actuator (1).

(5) Disengage the FAV actuator rod (4) from the FAV actuator (1).
(6) Remove the nut (6), washer (7), bolt (10), washer (7) and bushing (9) from the bracket (8).

NOTE: You can get access to the below part of the left side of the thrust reverser to remove the nut (6), washer (7), bolt (10), washer (7) and bushing (9) from the bracket (8) more easily.

(7) Disengage the scoop rod (12) from the bracket (8).

NOTE: You can get access to the below part of the left side of the thrust reverser to disengage the scoop rod (12) from the bracket (8) more easily.

(8) Remove the bolts (15) and the washers (14) from the scoop (13).
(9) Disassemble the FAV (5) and the scoop (13):
(a) Remove the clamp (27) from the FAV (5) and the scoop (13).
(b) Remove and discard the seal (26).
(10) Remove the bolt (22) from the FAV (5).

NOTE: The plate (23) stays attached to the FAV (5) with a metal link.

(11) Disengage the FAV actuator rod (4) from the FAV rod (21).
(12) Remove the FAV (5) from the structure (11):
(a) Carefully disengage the FAV (5) from the pin holes (24) and the bleed-air precooler-exchanger cold-inlet (28).

[Rev.10 from 2021] 2026.04.01 12:38:08 UTC