Installation of the Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Fan Air-Valve Actuator

TASK 36-11-49-400-829-A
Installation of the Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Fan Air-Valve Actuator

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
ZONE: 472
ZONE: 482

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)
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	2	FOIL - ALUMINUM
No specific	AR	PLUG - BLANKING
No specific	AR	WARNING NOTICE(S)
No specific	2	WATER - SOAPY SOLUTION
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 )
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION
98L12003001000	AR	HARNESS,SAFETY

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06ABB2)	Polysulfide Sealant-Fuel Tank Fillet 120 degre Celsius
(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
472	PYLON LEADING EDGE
482	PYLON LEADING EDGE
191DB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413ET, 415AL, 415AR, 437AL, 438AR, 451AL, 452AR, 472AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423ET, 424DR, 425AL, 425AR, 447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-00-00-481-002-A	Installation of the Wingrip
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
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 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
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 54-53-11-000-804-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-53-11-400-804-A	Installation of the Pylon-to-Wing Access Panels and 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 Line between the Bleed-Air Precooler Exchanger (Downstream) and the Fan Air-Valve Actuator

3. Job Set-up
Subtask 36-11-49-861-122-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 36-11-49-941-143-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.
(5) On FLAPS panel 114VU:

Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
Make sure that the WARNING NOTICE(S) is in position on the flap/slat control lever to tell persons not to operate the flap/slat controls.

(6) Put on and attach a 98L12003001000 HARNESS,SAFETY before you start work in the work area (Ref. AMM TASK 12-00-00-481-002).

Subtask 36-11-49-865-220-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 36-11-49-010-259-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 36-11-49-040-169-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 36-11-49-010-260-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 415AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
425AL 425AR

4. Procedure
Subtask 36-11-49-420-145-A ** ON A/C NOT FOR ALL

A. Installation of the Sense Line between the Pylon Interface and the Fan Air-Valve Actuator

NOTE: To install sense line (3), you have to install the sense line (5) in the pylon first.

(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 fan air-valve actuator (10).
(7) Put the sense line (5) in the correct position between the fan air-valve actuator (10) and the pylon interface (6).
(8) Connect the sense line (5) with the union nut (9) to the fan air-valve actuator (10). Do not torque the union nut (9) at this time.
(9) Install the clamp (12) with the sense line (5) on the support (11) as follows:
(a) Make sure that you install the protective parts with the clamp (12).
(b) Install the two washers (13) and the bolts (14) in the clamp (12).
(c) Tighten the two bolts (14).

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.

(10) TORQUE the union nut (9) of the sense line (5) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(a) Identify the tightened union nut (9) of the sense line (5) with a red line (Ref. AMM TASK 20-23-22-910-001).

Subtask 36-11-49-480-089-A ** ON A/C NOT FOR ALL

B. Prepare for the Leak Test on the Connections of the Sense Line (5)
(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
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 36-11-49-410-200-A ** ON A/C NOT FOR ALL

C. 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 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 36-11-49-440-120-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-49-410-201-A ** ON A/C NOT FOR ALL

E. 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

Subtask 36-11-49-010-253-A ** ON A/C NOT FOR ALL

F. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the pylon access panels.
(2) Make sure that these access panels are removed (Ref. AMM TASK 54-53-11-000-804):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413ET 472AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423ET 424DR

Subtask 36-11-49-420-147-A ** ON A/C NOT FOR ALL

G. Installation of the Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Pylon Interface

NOTE: You must install the sense line (5) in the pylon before you install the sense line (3) in the pylon.

(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-air precooler exchanger (1).
(5) Install the two washers (7) and bolts (8), if necessary.
(a) Tighten the two bolts (8).
(6) Apply a layer of Polysulfide Sealant-Fuel Tank Fillet 120 degre Celsius (Material No.06ABB2) around the hole of the pylon interface (6) and on the heads of the two bolts (8).
(7) Connect the sense line (3) in the correct position between the bleed-air precooler exchanger (1) and the pylon interface (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.

(a) TORQUE the union nut (2) of the sense line (3) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
1 Identify the tightened union nut (3) of the sense line (3) with a red line (Ref. AMM TASK 20-23-22-910-001).
(b) TORQUE the union nut (4) of the sense line (3) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
1 Identify the tightened union nut (4) of the sense line (3) with a red line (Ref. AMM TASK 20-23-22-910-001).

Subtask 36-11-49-865-221-A ** ON A/C NOT FOR ALL

H. 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 36-11-49-480-087-A ** ON A/C NOT FOR ALL

I. Prepare for the Leak Test on the Connections of the Sense Line (3)
(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.

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 36-11-49-790-059-A ** ON A/C NOT FOR ALL

J. 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 (3) 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 line (3) connections.

Subtask 36-11-49-410-204-A ** ON A/C NOT FOR ALL

K. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install these access panels (Ref. AMM TASK 54-53-11-400-804):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413ET 472AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423ET 424DR
(3) Remove the access platform(s).

Subtask 36-11-49-010-262-A ** ON A/C NOT FOR ALL

L. Get Access
(1) Open the fan cowl doors (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

Subtask 36-11-49-040-171-A ** ON A/C NOT FOR ALL

M. Deactivation of the Thrust Reverser System 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) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 36-11-49-010-263-A ** ON A/C NOT FOR ALL

N. Get Access
(1) Open the thrust reverser cowl-doors (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) Put an ACCESS PLATFORM 2M (6 FT) in position.

Subtask 36-11-49-080-065-A ** ON A/C NOT FOR ALL

O. Make sure that there are no leaks at the sense line (5) connections.

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

(1) Remove the materials used to do the leak test on the sense line (5) connections.

5. Close-up
Subtask 36-11-49-410-203-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) Install these access panels (Ref. AMM TASK 54-51-21-400-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
415AL 415AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
425AL 425AR
(4) 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 36-11-49-440-122-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 36-11-49-410-198-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Install these access panels (Ref. AMM TASK 54-53-11-400-804):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413ET 472AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423ET 424DR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

Subtask 36-11-49-862-117-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 01:11:36 UTC