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

TASK 36-11-49-000-836-A
Removal 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 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: 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

NOTE: Two persons are necessary for this procedure.

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	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
No specific	2	WRENCH - STANDARD

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

C. 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 54-51-21-000-804-A	Removal of the Pylon Lateral Access-Doors
TASK 54-51-61-000-802-A	Removal of the Thermal Blankets between RIB1 and RIB5
TASK 54-51-63-000-801-A	Removal of the Supports of the Engine Fire-Extinguisher Bottles
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-806-A	Opening 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 36-11-49-861-131-A

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

Subtask 36-11-49-941-150-A

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) Put a WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.
(3) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(4) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
(5) On access door 191DB, on the HP ground connector:
(a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.

Subtask 36-11-49-865-234-A

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 36-11-49-010-282-A

D. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR

Subtask 36-11-49-040-173-A

E. 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 78-30-00-040-809).

Subtask 36-11-49-010-283-A

F. Get Access
(1) Open the thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
(3) Remove these access doors (Ref. AMM TASK 54-51-21-000-804):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
415AL 415BL 415BR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
425AL 425BL 425BR

Subtask 36-11-49-020-164-A

G. Removal of the Components
(1) Remove the engine fire-extinguishing bottle-supports (Ref. AMM TASK 54-51-63-000-801).
(2) Remove the thermal blanket (Ref. AMM TASK 54-51-61-000-802).

4. Procedure
Subtask 36-11-49-020-161-A

A. Removal 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 (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) Loosen the union nut (18) of the indicating tube (16).
(4) Disconnect the indicating tube (16) from the sense line (1).
(5) Remove the bolts (14) and washers (12) from the pylon interface (11).
(6) Remove the clamps (9) as follows:
(a) Remove the bolts (7) and washers (8) from the clamps (9).
(b) Remove the first parts of the clamps (9) from the second parts of the clamps (9) and the sense line (1).
(c) Make sure that the second parts of the clamps (9) stay on the supports (10).
(d) If the sense line (2) is removed of the pylon, remove only the second parts of the clamps (9).
(7) Loosen the union nut (3) of the sense line (1):

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

(a) Use a second WRENCH - STANDARD to hold the bleed transferred pressure-transducer (4) when you loosen the union nut (3).
(8) Disconnect the sense line (1) from the bleed transferred pressure-transducer (4) and the pylon interface (11).
(9) Remove the sense line (1) from the pylon.
(10) Put PLUG - BLANKING on the port of the bleed transferred pressure-transducer (4) and the indicating tube (16).
(11) Put the PLUG-BLANKING in each disconnected line end.

Subtask 36-11-49-020-162-A

B. Removal of the Sense Line of the Bleed Regulated Pressure-Transducer
(1) Loosen the union nut (19) of the indicating tube (17).
(2) Disconnect the indicating tube (17) from the sense line (2).
(3) Remove the two bolts (15) and washers (13) from the pylon interface (11).
(4) Remove the two clamps (9).
(a) Remove the four bolts (7) and washers (8) from the two clamps (9).
(b) Remove the first parts of the two clamps (9) from the second parts of the two clamps (9) and the sense line (2).
(c) Make sure that the second parts of the two clamps (9) stay on the supports (10).
(d) If the sense line (1) is removed of the pylon, remove only the second parts of the two clamps (9).
(5) Loosen the union nut (6) of the sense line (2).

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

(a) Use a second WRENCH - STANDARD to hold the bleed regulated pressure-transducer (5) when you loosen the union nut (6).
(b) Disconnect the sense line (2) from the bleed regulated pressure-transducer (5) and the pylon interface (11).
(6) Remove the sense line (2) from the pylon.
(7) Put PLUG - BLANKING on the port of the bleed regulated pressure-transducer (5) and the indicating tube (17).
(8) Put the PLUG-BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.01 01:11:58 UTC