Removal of the Sense Line between the Bleed Pressure-Regulator Valve (PRV) and the Pylon Interface

TASK 36-11-49-000-016-A
Removal of the Sense Line between the Bleed Pressure-Regulator Valve (PRV) and the Pylon Interface

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

CAUTION: MAKE SURE THAT YOU USE THE CORRECT PLUG TO DO THE REGULATION FUNCTION OF PRV P/N 6774G010000. IF YOU DO NOT USE THE CORRECT PLUG, THERE IS A RISK OF OVERPRESSURE AND/OR POSSIBLE DUAL BLEED LOSS.

1. Reason for the Job
This procedure is related to the removal of the sense line installed between the bleed Pressure-Regulator Valve (PRV) and the pylon interface.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - STANDARD
No specific	Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
No specific	Torque wrench: range to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03PBB1)	Lubricant-Anti Seize High Temp. -
(Material No.03QBC1)	Dry lubricant-General Assembly Molybdenum Disulfide & Silicone -
(Material No.08BBE1)	Non Aqueous Cleaner-- Methyl Alcohol -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 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 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 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
Sense Line between the Bleed Pressure-Regulator Valve (PRV) and the Pylon Interface ** ON A/C NOT FOR ALL
Correct Plug for the Bleed Pressure-Regulator Valve (PRV) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 36-11-49-861-097-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 36-11-49-941-115-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(2) On the AIR COND panel 30VU:

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

Subtask 36-11-49-865-154-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 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

Subtask 36-11-49-010-173-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put an ACCESS PLATFORM 1M(3 FT) in position below the applicable engine.

Subtask 36-11-49-040-128-A ** ON A/C NOT FOR ALL

E. Deactivate the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Do the deactivation of the Hydraulic Control Unit (HCU) of the thrust reverser (Ref. AMM TASK 78-30-00-040-012).

Subtask 36-11-49-010-174-A ** ON A/C NOT FOR ALL

F. Open the Thrust Reverser Halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

4. Procedure
Subtask 36-11-49-020-115-A ** ON A/C NOT FOR ALL

A. Removal of the Sense Line between the Bleed PRV and the Pylon Interface
(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 APU (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) Remove the screw (6), washer (7) and nut (12) from the valve (1).
(4) Attach the clamp (8) on the sense line (3).
(5) Remove the plug (9) from the storage port (10) of the pylon interface.
(6) Disconnect the sense line (3) between the port (11) of the pylon interface and the port (2) of the valve (1) as follows:
(a) Loosen the pneumatic unions a quarter turn with a WRENCH - STANDARD.
(b) Remove the unions with your hand to prevent damage to the fitting end of the sense line.
(c) Disconnect and remove the sense line (3).
(d) Put the PLUG-BLANKING in each disconnected line end.
(7) Clean the threads of the port (11) with a lint-free cotton cloth Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-- Methyl Alcohol - (Material No.08BBE1) .
(8) Apply lubricating material in the pylon interface port (11) before installation of the plug (9) to prevent clogging as follows:

CAUTION: BEFORE YOU APPLY LUBRICANT, PUT TAPE ON THE UNION HOLES OF THE VALVE AND THE PYLON INTERFACE TO PREVENT LUBRICANT CONTAMINATION OF THE PNEUMATIC CONNECTION.

CAUTION: APPLY ONLY A THIN LAYER OF GREASE TO THE THREADS OF THE HOSE-ASSEMBLY COUPLING NUTS, AND REMOVE THE UNWANTED GREASE TO PREVENT CONTAMINATION OF THE HOSE ASSEMBLY. IF YOU USE TOO MUCH GREASE, IT CAN CAUSE CLOGGING OF THE HOSE ASSEMBLY OR DAMAGE TO THE RELATED COMPONENTS.

(a) Apply a thin layer of Dry lubricant-General Assembly Molybdenum Disulfide & Silicone - (Material No.03QBC1) or Lubricant-Anti Seize High Temp. - (Material No.03PBB1) to the threads of the union (11).
(9) Put the plug (9) in position on the port (11) of the pylon interface.

WARNING: TIGHTEN THE PLUG(S) TO THE CORRECT TORQUE VALUE. IF YOU DO NOT TIGHTEN THEM SUFFICIENTLY, HOT AIR LEAKAGE CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.

(10) TORQUE the plug (9) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(11) Remove the plug (5) from the storage port (4) of the valve (1).
(12) Clean the threads of the port (2) with a lint-free cotton cloth Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-- Methyl Alcohol - (Material No.08BBE1) .
(13) Apply lubricating material in the valve port (2) before installation of the plug (5) to prevent clogging as follows.

CAUTION: BEFORE YOU APPLY LUBRICANT, PUT TAPE ON THE UNION HOLES OF THE VALVE AND THE PYLON INTERFACE TO PREVENT LUBRICANT CONTAMINATION OF THE PNEUMATIC CONNECTION.

(a) Apply a thin layer of Dry lubricant-General Assembly Molybdenum Disulfide & Silicone - (Material No.03QBC1) or Lubricant-Anti Seize High Temp. - (Material No.03PBB1) to the threads of the union (2).
(14) Put the plug (5) in position on the port (2) of the valve (1).
(15) TORQUE the plug (5) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

[Rev.10 from 2021] 2026.04.01 01:11:13 UTC