Installation of the Sense Lines of the Bleed Regulated Pressure-Transducer and the Bleed Transferred Pressure-Transducer

TASK 36-11-49-400-832-A
Installation of the Sense Lines of the Bleed Regulated Pressure-Transducer and the Bleed Transferred Pressure-Transducer

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.

CAUTION: BE VERY CAREFUL WHEN YOU DO WORK ON OR NEAR THE AIR-CONDITIONING DUCTS. THE DUCTS ARE MADE OF THIN MATERIAL AND YOU CAN EASILY BREAK THEM.

ZONE: 410
ZONE: 420

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	FOIL - ALUMINUM
No specific	AR	PLUG - BLANKING
No specific	AR	WARNING NOTICE(S)
No specific	1	WATER - SOAPY SOLUTION
No specific	Torque wrench: range to between 0.85 and 0.73 m.daN (75.22 and 64.60 lbf.in )
No specific	Torque wrench: range to between 2.77 and 2.43 m.daN (20.43 and 17.92 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.PU6-0002)	lubricant
(Material No.06LDG2)	Non Hardening Jointing Putty-High Temp. Area - Structure
(Material No.14QEB1)	Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -

C. 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
191DB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
415AL, 415BL, 415BR, 437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
425AL, 425BL, 425BR, 447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
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 36-12-00-860-802-A	Pressurization of the Bleed System with the APU
TASK 36-12-00-860-803-A	Pressurization of the Bleed System through the HP Ground Connector
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 54-51-21-000-802-A	Removal of the Pylon Lateral Access-Doors
TASK 54-51-21-400-802-A	Installation of the Pylon Lateral Access-Doors
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 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
Sense Lines of the Bleed Regulated Pressure-Transducer and the Bleed Transferred Pressure-Transducer

3. Job Set-up
Subtask 36-11-49-861-124-A ** ON A/C NOT FOR ALL

A. 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).

Subtask 36-11-49-941-141-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:
(a) Make sure that the ENG 1(2) BLEED pushbutton switch is released (OFF legend on).
(b) Make sure that the APU BLEED pushbutton switch is released (ON legend off).
(c) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the pneumatic system.
(3) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(4) On access door 191DB, on the HP ground connector:
(a) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.

Subtask 36-11-49-865-223-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 36-11-49-010-255-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that these fan cowl doors are open (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
(2) Make sure that an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

Subtask 36-11-49-040-170-A ** ON A/C NOT FOR ALL

E. Deactivation of the Thrust Reverser for Ground 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) Make sure that the thrust reverser system is deactivated for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 36-11-49-010-261-A ** ON A/C NOT FOR ALL

F. Get Access
(1) Make sure that the thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR
(2) Make sure that these access panels are removed (Ref. AMM TASK 54-51-21-000-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
415AL 415BL 415BR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
425AL 425BL 425BR

4. Procedure
Subtask 36-11-49-420-146-A ** ON A/C NOT FOR ALL

A. Installation of the Sense Line of the Bleed Transferred Pressure-Transducer
(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) Do an inspection of the component interfaces and the adjacent area.
(4) Clean the component interfaces and the adjacent area.
(5) Remove the PLUG-BLANKING from each disconnected line end.
(6) Remove the PLUG - BLANKING from the port of the bleed transferred pressure-transducer (4) and the HPV pylon sense hose (16).
(7) Clean the mating surface of the fitting (20) (Ref. AMM TASK 20-28-00-912-802).
(8) Apply a thin layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) on the mating surface of the fitting (20).
(9) Put the sense line (1) in the correct position between the bleed transferred pressure-transducer (4) and the pylon interface (11).
(10) Connect the sense line (1) with the union nut (3) to the bleed transferred pressure-transducer (4). Do not torque the union nut (3) at this time.
(11) Install the three clamps (9) as follows only after the installation of sense line (2):
(a) Make sure that the second parts of the three clamps (9) are in the correct position on the three supports (10).
(b) Install the first parts of the three clamps (9) on the second parts of the three clamps (9) with the sense line (1).
(c) Install the six washers (8) and the bolts (7). Do not tighten the six bolts (7) at this time.
(12) Install the fitting (20) in the pylon interface (11) as follows:
(a) Install the two washers (12) and bolts (14).
(b) Tighten the two bolts (14).
(c) Do an electrical bonding of the fitting (20) (Ref. AMM TASK 20-28-00-912-802).

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.

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT THE PNEUMATIC LINES ON UNIONS.

(13) TORQUE the union nut (3) to between 0.85 and 0.73 m.daN (75.22 and 64.60 lbf.in )

.
(a) Identify the union nut (3) and the bleed transferred pressure-transducer (4) with a red line (Ref. AMM TASK 20-23-22-910-001).
(14) Tighten the six bolts (7).
(15) Connect the coupling nut (18) of the HPV pylon sense-hose (16) to the sense line (1) as follows:

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

(a) Apply a thin layer of lubricant (Material No.PU6-0002) or equivalent to the threads of the coupling nut (18) of the HPV pylon sense-hose (16).
(b) Connect the coupling nut (18) of the HPV pylon sense-hose (16) to the sense line (1).
(c) Adjust the coupling nut (18) of the HPV pylon sense-hose (16) until it is at an angle between 35 deg. and 45 deg. counterclockwise from the horizontal (Detail H).

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.

CAUTION: HOLD THE NUT ADJACENT TO THE FLEXIBLE PART OF THE HOSE WITH A WRENCH WHEN YOU TORQUE THE COUPLING NUT. IF YOU DO NOT OBEY THIS INSTRUCTION, THE HOSE CAN TWIST AND BE DAMAGED.

(d) TORQUE the coupling nut (18) of the HPV pylon sense-hose (16) to the sense line (2) to between 2.77 and 2.43 m.daN (20.43 and 17.92 lbf.ft )

.
1 Identify the tightened coupling nut (18) of the HPV pylon sense-hose (16) with a red line (Ref. AMM TASK 20-23-22-910-001).

Subtask 36-11-49-420-148-A ** ON A/C NOT FOR ALL

B. Installation of the Sense Line of the Bleed Regulated Pressure-Transducer
(1) Do an inspection of the component interfaces and the adjacent area.
(2) Clean the component interfaces and the adjacent area.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Remove the PLUG - BLANKING from the port of the bleed regulated pressure-transducer (5) and the PRV pylon sense-hose (17).
(5) Clean the mating surface of the fitting (21) (Ref. AMM TASK 20-28-00-912-802).
(6) Apply a thin layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) on the mating surface of the fitting (21).
(7) Put the sense line (2) in the correct position between the bleed regulated pressure-transducer (5) and the pylon interface (11).
(8) Connect the sense line (2) with the union nut (6) to the bleed regulated pressure-transducer (5). Do not torque the union nut (6) at this time.
(9) Install the three clamps (9).

NOTE: Do not do this step if the sense line (1) is not already installed.

(a) Make sure that the second parts of the three clamps (9) are in the correct position on the three supports (10).
(b) Install the first parts of the three clamps (9) on the second parts of the three clamps (9) with the sense line (2).
(c) Install the six washers (8) and bolts (7). Do not tighten the six bolts (7) at this time.
(10) Install the sense line (2) in the pylon interface (11).
(a) Install the two washers (13) and bolts (15).
(b) Tighten the two bolts (15).
(c) Do the electrical bonding of the fitting (21) (Ref. AMM TASK 20-28-00-912-802).
(11) Tighten the union nut (6).

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.

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT THE PNEUMATIC LINES ON UNIONS.

(a) TORQUE the union nut (6) to between 0.85 and 0.73 m.daN (75.22 and 64.60 lbf.in )

.
(b) Identify the union nut (6) and the bleed regulated pressure-transducer (5) with a red line (Ref. AMM TASK 20-23-22-910-001).
(12) Tighten the six bolts (7).
(13) Connect the coupling nut (19) of the PRV pylon sense-hose (17) to the sense line (2).

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

(a) Apply a thin layer of lubricant (Material No.PU6-0002) or equivalent to the threads of the coupling nut (19) of the PRV pylon sense-hose (17).
(b) Connect the coupling nut (19) of the PRV pylon sense-hose (17) to the sense line (2).
(c) Adjust the coupling nut (19) of the PRV pylon sense-hose (17) until it is at an angle between 126 deg. and 136 deg. clockwise from the horizontal (Detail H).
(d) Torque the coupling nut (19).

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.

CAUTION: HOLD THE NUT ADJACENT TO THE FLEXIBLE PART OF THE HOSE WITH A WRENCH WHEN YOU TORQUE THE COUPLING NUT. IF YOU DO NOT OBEY THIS INSTRUCTION, THE HOSE CAN TWIST AND BE DAMAGED.

1 TORQUE the coupling nut (19) of the PRV pylon sense-hose (17) to the sense line (2) to between 2.77 and 2.43 m.daN (20.43 and 17.92 lbf.ft )

.
2 Identify the tightened coupling nut (19) of the PRV pylon sense-hose (17) with a red line (Ref. AMM TASK 20-23-22-910-001).

Subtask 36-11-49-865-224-A ** ON A/C NOT FOR ALL

C. 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
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 36-11-49-480-088-A ** ON A/C NOT FOR ALL

D. Prepare for the Leak Test on the Connections of the Sense Lines (1) and (2)
(1) There are two procedures to do a leak check at the connections of the bleed air ducts (duct joint, flexible connections).
(a) Soap solution procedure.

Leaks are permitted if the WATER - SOAPY SOLUTION stays on the joint line with a continuous series of bubbles.
Leaks are not permitted if the air pressure (from the air source) blows the soap solution off the joint line and prevents a continuous series of bubbles.

(b) Aluminum foil procedure.

NOTE: This procedure is recommended when you do a leak check with hot air.

1 Wind the FOIL - ALUMINUM on the joint once.
2 Twist tight the seam of the foil wrap.

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.

3 Make the foil wrap as tight as possible on the tube but do not rip the wrap.
4 Attach the foil wrap at the two sides of the pneumatic joint with 14QEB1Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -.

Subtask 36-11-49-790-060-A ** ON A/C NOT FOR ALL

E. Leak Test
(1) Pressurize the bleed system through the HP ground connector (Ref. AMM TASK 36-12-00-860-803) or with the APU (Ref. AMM TASK 36-12-00-860-802).
(a) Make sure that there are no leaks at the sense line connections.

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

(2) Remove the materials used to do the leak test on the sense lines (1) and (2) connections.

5. Close-up
Subtask 36-11-49-410-199-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Put the aircraft back to its initial configuration.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

Subtask 36-11-49-440-121-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 36-11-49-410-202-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Install these access panels (Ref. AMM TASK 54-51-21-400-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
415AL 415BL 415BR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
425AL 425BL 425BR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 36-11-49-862-118-A ** ON A/C NOT FOR ALL

D. 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 01:11:39 UTC