Functional Test of the Fan Air Valve (FAV) and the Fan Air Valve Actuator with the Bleed Test Set P/N 99127B04 and the Bleed Test Kit P/N 99127-281

TASK 36-11-54-720-805-A-01
Functional Test of the Fan Air Valve (FAV) and the Fan Air Valve Actuator with the Bleed Test Set P/N 99127B04 and the Bleed Test Kit P/N 99127-281

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

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

WARNING: MAKE SURE THAT THE SAFETY DEVICES AND THE WARNING NOTICES ARE IN POSITION BEFORE YOU START A TASK ON OR NEAR:

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

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

WARNING: BEFORE YOU INSTALL/REMOVE THE GSE TOOL, READ THE MANUFACTURER'S INSTRUCTIONS, AND, WHILE YOU OPERATE THIS TOOL, CAREFULLY OBEY THEM. IF YOU DO NOT DO THIS, INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.

WARNING: BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

CAUTION: BE CAREFUL WHEN YOU CONNECT/DISCONNECT THE TEST SET TO/FROM THE EQUIPMENT. THE PRESSURE REGULATING VALVE AND THE PRESSURE GAGE ASSEMBLY OF THE TEST SET ARE HEAVY AND CAN CAUSE DAMAGE TO THE ENGINE.

ZONE: 410
ZONE: 420
FIN: 7120HM1
FIN: 7120HM2
FIN: 9HA1
FIN: 9HA2

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	1	AIR SOURCE - REGULATED, FILTERED, DRY
No specific	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	SUPPLY - 28 VDC, ELECTRICAL
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.38 and 0.312 m.daN (33.63 and 27.61 lbf.in )
No specific	Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
99127-281	1	BLEED TEST KIT
99127B04	1	BLEED TEST SET

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
FOR [1000EM1] (ENGINE-1)
438AR, 452AR
FOR [1000EM2] (ENGINE-2)
448AR, 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 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
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 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 36-11-00-740-804-A	BITE Test of the Engine Bleed Air System (EBAS) (System Test)
TASK 54-51-21-000-804-A	Removal of the Pylon Lateral Access-Doors
TASK 54-51-21-400-803-A	Installation of the Pylon Lateral Access-Doors
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Preparation of the Test of the FAV
FAV with the Bleed Test Set P/N 99127B04 and the Bleed Test Kit P/N 99127-281

3. Job Set-up
Subtask 36-11-54-861-066-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 36-11-54-941-068-A

B. Safety Precautions
(1) Make sure that engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(2) 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).
Put a WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.

(3) On ENG panel 115VU:

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

(4) On the HP ground connector:

Put a WARNING NOTICE(S) in position 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 ENG/FADEC GND PWR 1(2) pushbutton switch is off.
Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 36-11-54-865-084-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR BLEED/APU BLEED VLV CTL/BMC1 OVRD	11HV	D14
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
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
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
122VU	AIR BLEED/APU BLEED VLV CTL/BMC2 OVRD	12HV	Z19

Subtask 36-11-54-010-095-A

D. Get Access
(1) Open the right fan cowl-doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [1000EM1] (ENGINE-1)
438AR
(b) FOR [1000EM2] (ENGINE-2)
448AR.

Subtask 36-11-54-010-096-A

E. Open the right thrust-reverser doors (Ref. AMM TASK 78-36-00-010-806):
(1) FOR [1000EM1] (ENGINE-1)
452AR
(2) FOR [1000EM2] (ENGINE-2)
462AR.
(3) Put the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position below the engine.

Subtask 36-11-54-010-097-A

F. Get Access
(1) Remove the access doors (Ref. AMM TASK 54-51-21-000-804):
(a) FOR [9HA1] (VALVE-FAN AIR, ENG1)
415AR.
(b) FOR [9HA2] (VALVE-FAN AIR, ENG2)
425AR.

4. Procedure
Subtask 36-11-54-750-053-A

A. Manual Test of the FAV and Rod Assembly
(1) Make sure that the rod (2) is attached to the fan air valve-body.
(2) Loosen and remove the screw (1) from the rod (2) of the fan air-valve actuator.
(3) Make sure that the valve butterfly moves freely:

With your hand, push the rod (2) to fully open the fan air-valve body.
Then pull the rod (2) to fully close the fan air-valve body.

(4) Make sure that the fan air-valve body is fully closed.
(5) Put the rod (2) in position on the fan air-valve actuator to install the screw (1).
(6) TORQUE the screw (1) to between 0.38 and 0.312 m.daN (33.63 and 27.61 lbf.in )

Subtask 36-11-54-480-057-A

B. Preparation of the Functional Test of the FAV

CAUTION: YOU MUST USE THE WRENCH FLATS ON THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN ANY OR ALL TUBE NUTS. THIS WILL PREVENT ANY TWIST DAMAGE TO THE TUBES.

(1) Use the 99127B04 BLEED TEST SET (T01) with the 99127-281 BLEED TEST KIT to do this test.
(2) On the 99127B04 BLEED TEST SET (T01), make sure that:

Pressure control knobs P1 (2) and P2 (3) are turned fully counterclockwise.
The handles of the shut-off valves (6) and (7) are in the OFF position.
The switches (24) and (25) are in position 2 (OFF).
The knob (38) is in position 0.
The stopwatch switch (19) is down (OFF).
The multimeter knob (41) is in the OFF (vertical) position.
The multimeter switch (28) is in position 0.
The POWER SUPPLY knob (35) is turned fully counterclockwise.
The SQUARE SIGNAL switch (34) is in the OFF position.
The TORQUE MOTOR switch (33) is in the OFF position.
The POWER switch (31) is in the OFF position.

(3) Connection of the pneumatic hoses (T04) and (T05):

CAUTION: ONLY USE PNEUMATIC HOSES T04 AND T05 FROM THE LIEBHERR BLEED TEST SET 99127-B04. IF YOU USE DIFFERENT PNEUMATIC HOSES, YOU WILL GET INCORRECT TEST RESULTS.

(a) Make sure that you use the pneumatic hoses (T04) and (T05) available in the 99127B04 BLEED TEST SET (T01).
(4) Connect an AIR SOURCE - REGULATED, FILTERED, DRY to the 99127B04 BLEED TEST SET (T01) pressure input (1) and the pneumatic supply connector (T02).
(a) Make sure that the AIR SOURCE - REGULATED, FILTERED, DRY is set to 0 psi (0.00 bar).
(5) Connect the 28VDC electrical cord (T03) between the 99127B04 BLEED TEST SET (T01) electrical inlet (11) and an external SUPPLY - 28 VDC, ELECTRICAL.
(a) Start the SUPPLY - 28 VDC, ELECTRICAL.
(6) Push the pushbutton (26) and make sure that lights come on from (15) to (21).
(7) Connect the yellow pneumatic hose (T04) between the Y-adaptor (T06) and the 99127B04 BLEED TEST SET (T01) pressure outlet (9).
(8) Connect the red pneumatic hose (T05) between the Y-adaptor (T06) and the 99127B04 BLEED TEST SET (T01) pressure outlet (14).

CAUTION: USE A SECOND WRENCH TO APPLY COUNTER TORQUE TO THE UNIONS WHEN YOU DISCONNECT/CONNECT THE PNEUMATIC LINES FROM/TO THE UNIONS. IF YOU DO NOT OBEY THIS PRECAUTION, YOU CAN TWIST THE PNEUMATIC LINES AND CAUSE DAMAGE TO THEM.

(9) Disconnect the sense line from the FAV.
(10) Put the PLUG-BLANKING in each disconnected line end.
(11) Connect the test port adaptor (T25) to the test port of the FAV.
(12) Connect the Y-adaptor (T06) to the test port adaptor (T25).

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(13) Disconnect the harness electrical connector 9HA1-A (9HA2-A) from the FAV.
(14) Put a CAP - BLANKING on the electrical connector 9HA1-A (9HA2-A).

CAUTION: MAKE SURE THAT:

YOU DO NOT APPLY HIGH LOADS WHEN YOU ENGAGE THE TEST PORT ADAPTOR IN THE VALVE OR THE SENSOR
YOU TIGHTEN THE ADAPTOR MANUALLY. IF YOU APPLY A LOAD THAT IS TOO HIGH, DAMAGE TO THE PIN OF THE TEST PORT ADAPTOR CAN OCCUR.

(15) Connect the electrical adaptor (T14) between the FAV and the electrical connector (29) of the 99127B04 BLEED TEST SET (T01), and tighten it with your hand.
(16) Set the digital pressure gage (5) to ON:
(a) Make sure that the pressure value shown on the digital pressure gage (5) is equal to 0 psi (0.00 bar).
(b) If it is not equal to 0 psi (0.00 bar), push and hold the ON button for 10 seconds.
(17) Pressurize the 99127B04 BLEED TEST SET (T01):

WARNING: BE CAREFUL WHEN YOU PRESSURIZE THE BLEED TEST SET. THE MAXIMUM PRESSURE PERMITTED BY THE BLEED TEST SET IS 290 PSI. PRESSURE HIGHER THAN THE PRESSURE PERMITTED BY THE EQUIPMENT CAN CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT.

(a) Pressurize the 99127B04 BLEED TEST SET (T01) with the AIR SOURCE - REGULATED, FILTERED, DRY to between 100 psi (6.89 bar) and 200 psi (13.79 bar).

Subtask 36-11-54-720-060-A

C. Functional Test of the FAV
(1) Do this test:

ACTION	RESULT
1.On the 99127B04 BLEED TEST SET (T01): Set the POWER switch (31) to the ON position Set the SQUARE SIGNAL switch (34) to the ON position Set the TORQUE MOTOR switch (33) to the ON position.	On the 99127B04 BLEED TEST SET (T01): The VOLTAGE indicator (37) and the CURRENT indicator (36) come on Values shown on the current indicator must be less than 40 mA. On the FAV: The position indicator shows CLOSED.
2.On the 99127B04 BLEED TEST SET (T01): Set the shut-off valve handle (7) to the ON position Slowly turn the regulator knob (3) to increase the pressure to 20 +1 psi or -1 psi (1.38 +0.07 bar or -0.07 bar).	On the 99127B04 BLEED TEST SET (T01): The digital pressure gage shows 20 +1 psi or -1 psi (1.38 +0.07 bar or -0.07 bar). On the FAV : The position indicator shows OPEN.
3.On the 99127B04 BLEED TEST SET (T01): Turn the power-supply rotary button (35) to apply a current of more than 370 mA.	On the FAV: The position indicator shows CLOSED.
4.On the 99127B04 BLEED TEST SET (T01): Set the POWER switch (31) to the OFF position Set the SQUARE SIGNAL switch (34) to the OFF position Set the TORQUE MOTOR switch (33) to the OFF position.	On the 99127B04 BLEED TEST SET (T01): The VOLTAGE indicator (37) and CURRENT indicator (36) go off. On the FAV : The position indicator shows OPEN.
5.On the 99127B04 BLEED TEST SET (T01): Slowly turn the regulator knob (3) to decrease the pressure to 0 psi (0.00 bar) Set the shut-off Valve handle (7) to the OFF position.	On the 99127B04 BLEED TEST SET (T01): The digital pressure gage shows 0 psi (0.00 bar). On the FAV: The position indicator shows CLOSED.

Subtask 36-11-54-080-057-A

D. Disconnection of the Test Set

WARNING: BEFORE YOU START TO REMOVE THE TOOLING, MAKE SURE THAT THERE IS NO PRESSURIZED GAS LEFT INSIDE THE DUCTS. IT CAN CAUSE AN INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT.

(1) Close the shut-off valve of the AIR SOURCE - REGULATED, FILTERED, DRY to decrease the pressure of the 99127B04 BLEED TEST SET (T01) to 0 psi (0.00 bar).
(2) Disconnect the test port adaptor (T25) from the FAV.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Connect the sense line to the pressure port of the FAV.

(5) TORQUE the nut of the sense line to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(6) Disconnect the electrical adaptor (T14) from the FAV.
(7) Remove the CAP - BLANKING from the harness electrical connector 9HA1-A (9HA2-A).
(8) Connect the harness electrical connector 9HA1-A (9HA2-A) to the FAV and tighten it with your hand.
(9) Disconnect the electrical adaptor (T14) from the 99127B04 BLEED TEST SET (T01).
(10) Disconnect the Y-adaptor (T06) from the test port adaptor (T25).
(11) Disconnect the pneumatic hoses (T04) and (T05) from the 99127B04 BLEED TEST SET (T01) and the Y-adaptor (T06).
(12) Disconnect the pneumatic supply connector (T02) from the 99127B04 BLEED TEST SET (T01) and the AIR SOURCE - REGULATED, FILTERED, DRY.
(13) Stop the SUPPLY - 28 VDC, ELECTRICAL.
(14) Disconnect the 28VDC electrical cord (T03) from the SUPPLY - 28 VDC, ELECTRICAL and the 99127B04 BLEED TEST SET (T01).
(15) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

Subtask 36-11-54-865-085-A

E. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR BLEED/APU BLEED VLV CTL/BMC1 OVRD	11HV	D14
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
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
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
122VU	AIR BLEED/APU BLEED VLV CTL/BMC2 OVRD	12HV	Z19

Subtask 36-11-54-740-052-A

F. Test
(1) Do the BITE test of the Engine Bleed Air System (EBAS) (Ref. AMM TASK 36-11-00-740-804).

5. Close-up
Subtask 36-11-54-410-086-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access doors (Ref. AMM TASK 54-51-21-400-803):
(a) FOR [9HA1] (VALVE-FAN AIR, ENG1)
415AR
(b) FOR [9HA2] (VALVE-FAN AIR, ENG2)
425AR.

Subtask 36-11-54-410-087-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the right thrust-reverser doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [1000EM1] (ENGINE-1)
452AR
(b) FOR [1000EM2] (ENGINE-2)
462AR.

Subtask 36-11-54-410-088-A

C. Close Access
(1) Close the right fan cowl-doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [1000EM1] (ENGINE-1)
438AR
(b) FOR [1000EM2] (ENGINE-2)
448AR.
(2) Remove the WARNING NOTICE(S).

Subtask 36-11-54-862-065-A

D. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 01:13:55 UTC