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

TASK 36-11-49-400-026-A
Installation of the Sense Line between the Bleed Pressure-Regulator Valve (PRV) and the Pylon Interface

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.

1. Reason for the Job
This procedure is related to the installation of the third sense line located 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)-ADJUSTABLE
No specific	AR	FOIL - ALUMINUM
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.25 and 0.2 m.daN (22.12 and 17.70 lbf.in )
No specific	Torque wrench: range to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )
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.08BBD1)	Non Aqueous Cleaner-- Isopropyl Alcohol -
(Material No.14QEB1)	Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -
(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 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 36-11-52-790-001-A	Leak Test of the Bleed-Pressure Regulator Valve with the Engine in Operation
TASK 36-11-52-790-001-A-03	Leak Test of the Bleed-Pressure Regulator Valve with the APU in Operation and with the Bleed Test Set P/N 98L36103002000
TASK 36-11-52-790-001-A-04	Leak Test of the Bleed-Pressure Regulator Valve with Ground Air-Supply Unit and with the Bleed Test Set P/N 98L36103002000
TASK 49-00-00-860-006-A	APU Shutdown by External Power
TASK 49-00-00-860-006-A-01	APU Shutdown by Batteries
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 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
Sense Line between the Bleed Pressure Regulator Valve (PRV) and the Pylon Interface ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 36-11-49-860-098-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that engine 1(2) is shutdown for a minimum of 5 minutes before you do this procedure.
(3) In the cockpit, on AIR COND panel 30VU:
(a) Make sure that the ENG 1(2) BLEED pushbutton-switch is released (the OFF legend is on).
(b) Make sure that the APU BLEED pushbutton-switch is released (the ON legend is off).
(c) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to operate the pneumatic system.
(4) In the cockpit, on ENG panel 115VU:
(a) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to start engine 1(2).
(5) On the HP ground connector:
(a) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to pressurize the pneumatic system.
(6) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton switch is off.
(b) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to energize FADEC 1(2).
(7) Make sure that the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE is in position below the applicable engine.

Subtask 36-11-49-010-169-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 36-11-49-040-125-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser is unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 36-11-49-865-149-A ** ON A/C NOT FOR ALL

D. 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
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22

4. Procedure
Subtask 36-11-49-420-106-A ** ON A/C NOT FOR ALL

A. Installation 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 TASK 49-00-00-860-006)
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) Do an inspection of the component interfaces and the adjacent area.
(4) Clean the component interfaces and the adjacent area.
(5) Remove the plug (7) from the port (2) of the valve (1).
(6) Clean the threads of the storage port (8) with a lint-free cotton cloth Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .

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.

(7) 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 storage port (8).

NOTE: Apply lubricating material in the storage port (8) of the valve (1) before installation of the plug (7) to prevent clogging.

(8) Put the plug (7) in position on the storage port (8) of the valve (1).
(9) TORQUE the plug (7) to between 0.25 and 0.2 m.daN (22.12 and 17.70 lbf.in )

.
(10) Remove the plug (10) from the port (12) on the pylon interface.
(11) Clean the threads of the storage port (11) with a lint-free cotton cloth Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .

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.

(12) 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 storage port (11).

NOTE: Apply lubricating material in the storage port (11) of the pylon interface before installation of the plug (10) to prevent clogging.

(13) Put the plug (10) in position on the storage port (11) of the pylon interface, through the warning loop of the sense line (3).
(14) TORQUE the plug (10) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(15) Clean the threads of the unions (2) and (12) with a lint-free cotton cloth Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .

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.

(16) 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) and (12).
(17) Remove the PLUG-BLANKING from each disconnected line end.

CAUTION: MAKE SURE THAT THE SENSE LINE DOES NOT TOUCH AN ENGINE PART. IF YOU DO NOT OBEY THIS INSTRUCTION, THERE IS A RISK OF CHAFING AND DAMAGE.

(18) Put the sense line (3) in position between the port (12) of the pylon interface and the port (2) of the valve (1).
(a) Tighten the unions manually.
(19) TORQUE the unions of the sense line (3) as follows:

WARNING: TIGHTEN THE UNION(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.

(a) At the port (12) of the pylon interface, to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

(b) At the port (2) of the valve (1), to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(20) Loosen the unions of the sense line (3) and do the torque procedure again.
(21) Put the clamp (6) in position on the sense line (3).
(22) Put the screw (4), the washer (5) and the nut (9) in position on the clamp (6).
(23) TORQUE the screw (4) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )

Subtask 36-11-49-480-063-A ** ON A/C NOT FOR ALL

B. Prepare for the leak test
(1) Do the steps that follow to install FOIL - ALUMINUM on the pylon interface around the plug:

Wind the foil wrap around the joint one time.
Twist the seam of the foil wrap tight.
Make the foil wrap as tight as possible on the tube but do not cause damage to the wrap.
Attach the foil wrap at the two sides of the pneumatic joint with 14QEB1Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -.

Subtask 36-11-49-410-150-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 36-11-49-440-096-A ** ON A/C NOT FOR ALL

D. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 36-11-49-865-150-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/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 36-11-49-720-077-A ** ON A/C NOT FOR ALL

F. Leak Test
(1) Do the leak test of the related PRV (Ref. AMM TASK 36-11-52-790-001).
(a) Make sure that there are no leaks at the unions of the sense line.

NOTE: There is a leak when the foil installed on the sense line breaks or when it is too hot.

(b) Remove the materials used to do the leak test.

5. Close-up
Subtask 36-11-49-410-146-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 WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 36-11-49-862-093-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 12:38:52 UTC