Functional Test of the HP Bleed Valve (HPV) with the Bleed Test Set P/N 99127B04 and the Bleed Test Kit P/N 99127-281

TASK 36-11-51-720-804-A-01
Functional Test of the HP Bleed Valve (HPV) with the Bleed Test Set P/N 99127B04 and the Bleed Test Kit P/N 99127-281

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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 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: YOU MUST NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY.

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: 438
ZONE: 448
ZONE: 452
ZONE: 462
FIN: 4000HA1 ** ON A/C NOT FOR ALL
FIN: 4000HA2 ** 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 1M (3 FT)-ADJUSTABLE
No specific	1	AIR SOURCE - REGULATED, FILTERED, DRY
No specific	AR	CAP - 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 2.2 and 1.8 m.daN (16.22 and 13.27 lbf.ft )
99127-281	1	BLEED TEST KIT
99127B04	1	BLEED TEST SET

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
438	FAN COWL
448	FAN COWL
452	THRUST REVERSER
462	THRUST REVERSER
FOR [1000EM1] (ENGINE-1)
438AR, 452AR
FOR [1000EM2] (ENGINE-2)
448AR, 462AR

D. 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 36-11-00-740-802-A	BITE Test of the Engine Bleed Air System (EBAS) (System Test)
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
HPV with the Bleed Test Set P/N 99127B04 and the Bleed Test Kit P/N 99127-281

3. Job Set-up
Subtask 36-11-51-861-076-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-51-941-078-A ** ON A/C NOT FOR ALL

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 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 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 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 36-11-51-865-086-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/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 36-11-51-010-109-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the right fan cowl-doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [1000EM1] (ENGINE-1)
438AR
(b) FOR [1000EM2] (ENGINE-2)
448AR.

Subtask 36-11-51-040-082-A ** ON A/C NOT FOR ALL

E. Deactivation of the Thrust Reverser System

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 (Ref. AMM TASK 78-30-00-040-805).

Subtask 36-11-51-010-110-A ** ON A/C NOT FOR ALL

F. Get Access
(1) Open the right thrust-reverser doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [1000EM1] (ENGINE-1)
452AR
(b) FOR [1000EM2] (ENGINE-2)
462AR.
(2) Put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position below the applicable engine.

4. Procedure
Subtask 36-11-51-750-055-A ** ON A/C NOT FOR ALL

A. Manual Test of the HPV
(1) On the valve position indicator, record the position of the butterfly valve.
(2) Make sure that the butterfly valve moves freely:

On the position indicator, use a WRENCH - STANDARD to fully open and fully close the butterfly valve.
Put the butterfly valve in the initial position that you recorded.

Subtask 36-11-51-480-076-A ** ON A/C NOT FOR ALL

B. Preparation of the Functional Test of the HPV
(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) Connect 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).
(9) Connect the Y-adaptor (T06) to the test port adaptor (T25).
(10) Removal of the lockwire:

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(a) Cut, remove and discard the lockwire from the test port screw of the HPV.
(11) Remove the test port screw from the test port of the HPV.
(12) Connect the test port adaptor (T30):
(a) Connect the test port adaptor (T30) to the test port of the bleed HPV with your hand.
(13) Connect the test port adaptor (T25) to the test port adaptor (T30).

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.

(14) Disconnect electrical connector 4000HA1-A (4000HA2-A) from the HPV.
(15) Put a CAP - BLANKING on electrical connector 4000HA1-A (4000HA2-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.

(16) Connect the HPV electrical connector (T12) between the HPV and the test set connector (12) of the 99127B04 BLEED TEST SET (T01) with your hand.
(17) 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/OFF button for 10 seconds.
(18) 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 36-11-51-720-081-A ** ON A/C NOT FOR ALL

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

ACTION	RESULT
1.On the 99127B04 BLEED TEST SET (T01): Set the shut-off valve (7) to ON.
2.On the 99127B04 BLEED TEST SET (T01): Set the switch (24) to position 1 (ON). Turn pressure-control knob reducer P2 to increase pressure P2 to 15 +1 psi or -1 psi (1.03 +0.07 bar or -0.07 bar).	On the 99127B04 BLEED TEST SET (T01): The light (22) is ON. The pressure value 15 +1 psi or -1 psi (1.0342 +0.0689 bar or -0.0689 bar) is shown on the digital pressure gage (5). On the HPV : Make sure that you hear the airflow through the vent of the valve. The position indicator shows OPEN.
3.On the 99127B04 BLEED TEST SET (T01): Set the switch (24) to position 2 (OFF).	On the 99127B04 BLEED TEST SET (T01): The light (22) is OFF. On the HPV: The position indicator keeps OPEN.
4.On the 99127B04 BLEED TEST SET (T01): Decrease pressure P2 to 0 psi (0.00 bar) and set the shut-off valve (7) to OFF.	On the 99127B04 BLEED TEST SET (T01): The pressure gage (5) shows 0 psi (0.00 bar). On the HPV : The position indicator shows OPEN. NOTE: The HPV stays open and will close automatically at the next engine start.

Subtask 36-11-51-080-074-A ** ON A/C NOT FOR ALL

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 (T30) from the HPV.
(3) Install the test port screw on the test port of the HPV.
(4) TORQUE the test port screw to between 2.2 and 1.8 m.daN (16.22 and 13.27 lbf.ft )

.
(5) Installation of the lockwire:

(a) Safety the test port screw with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(6) Disconnect the HPV electrical connector (T12) from the HPV.
(7) Remove the CAP - BLANKING from electrical connector 4000HA1-A (4000HA2-A).

CAUTION: MAKE SURE THAT ELECTRICAL CONNECTORS ARE CLEAN WHEN YOU CONNECT THEM. THE CONTAMINATION OF ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO THE EQUIPMENT.

(8) Connect electrical connector 4000HA1-A (4000HA2-A) to the HPV and tighten it with your hand.
(9) Disconnect the HPV electrical connector (T12) from the 99127B04 BLEED TEST SET (T01).
(10) Disconnect the test port adaptor (T25) from the Y-adaptor (T06) and the test port adaptor (T30).
(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) Disconnect the pneumatic supply connector (T02) from the AIR SOURCE - REGULATED, FILTERED, DRY and the 99127B04 BLEED TEST SET (T01) pressure input (1).
(16) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

Subtask 36-11-51-865-087-A ** ON A/C NOT FOR ALL

E. 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/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 36-11-51-740-053-A ** ON A/C NOT FOR ALL

F. Test
(1) Do the BITE test of the Engine Bleed Air System (EBAS) (Ref. AMM TASK 36-11-00-740-802).

5. Close-up
Subtask 36-11-51-410-102-A ** ON A/C NOT FOR ALL

A. 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 78-36-00-410-802):
(a) FOR [1000EM1] (ENGINE-1)
452AR
(b) FOR [1000EM2] (ENGINE-2)
462AR.

Subtask 36-11-51-440-075-A ** ON A/C NOT FOR ALL

B. Reactivation of the Thrust Reverser System
(1) Do the reactivation of the thrust reverser system (Ref. AMM TASK 78-30-00-440-805).

Subtask 36-11-51-410-103-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the right fan cowl-doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [1000EM1] (ENGINE-1)
438AR
(b) FOR [1000EM2] (ENGINE-2)
448AR.
(2) Remove the WARNING NOTICE(S).

Subtask 36-11-51-862-073-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 01:12:31 UTC