Installation of the Burner Pressure Sense Tube (AS11) [PW11]

TASK 73-21-23-400-802-A
Installation of the Burner Pressure Sense Tube (AS11)

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

CAUTION: DO NOT PUT AIR PRESSURE INTO THE BURNER PRESSURE SENSOR. IF YOU PRESSURIZE THE BURNER PRESSURE SENSOR, YOU CAN CAUSE DAMAGE TO IT.

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 1M (3 FT)-ADJUSTABLE
No specific	Torque wrench: range to between 44 and 38 lbf.in (0.50 and 0.43 m.daN )
No specific	Torque wrench: range to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )
No specific	Torque wrench: range to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P03-001)	lubricant, aircraft turbine engine
(Material No.P05-291)	Safety Cable
(Material No.P05-292)	Safety Cable Ferrule
(Material No.P05-395)	beeswax

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-832-A	Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC
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 73-25-34-400-802-A	Installation of the Engine Interface Unit (EIU)
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
TASK 79-21-11-000-802-A	Removal of the Air/Oil Heat Exchanger (AOHX)
TASK 79-21-11-400-802-A	Installation of the Air/Oil Heat Exchanger (AOHX)
Burner Pressure Sense Tube

3. Job Set-up
Subtask 73-21-23-941-053-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832)

Subtask 73-21-23-010-056-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR
(2) Make sure that the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE is in position.

Subtask 73-21-23-040-053-A ** ON A/C NOT FOR ALL

C. 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) Make sure that you did the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 73-21-23-010-057-A ** ON A/C NOT FOR ALL

D. 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 the engine air/oil heat exchanger is removed (Ref. AMM TASK 79-21-11-000-802).

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 73-21-23-420-051-A ** ON A/C NOT FOR ALL

A. Installation of the Burner Pressure Sense Tube (AS11)
(1) Removal of protection covers

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.
(2) Apply beeswax (Material No.P05-395) to the gasket (1).
(3) Install the gasket (1) to the diffuser case.
(4) Apply P03-001lubricant, aircraft turbine engine to the two bolts (2).
(5) Connect the sense tube (AS11) (3) to the diffuser case with the two bolts (2).
(6) TORQUE the two bolts (2) to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )

.
(7) Installation of safety cable

WARNING: USE 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.

(a) Safety the two bolts (2) with Safety Cable (Material No.P05-291) and Safety Cable Ferrule (Material No.P05-292) .
(8) Install the sense tube (AS11) (3) to the bracket with the clamp (5) and bolt (4).
(9) TORQUE the bolt (4) to between 44 and 38 lbf.in (0.50 and 0.43 m.daN )

.
(10) Connection of the Sense Tube (AS11)

CAUTION: USE A SECOND WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE OR HOSE NUTS. IF YOU DO NOT OBEY THIS CAUTION, YOU CAN TWIST OR CAUSE DAMAGE TO THE TUBES OR HOSES.

(a) Connect the sense tube (AS11) (3) B-nut to the burner pressure sensor.
(b) TORQUE the B-nut to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )

.
(11) Connect the harness (W03) to the sense tube (AS11) (3) spring clip.

Subtask 73-21-23-420-052-A ** ON A/C NOT FOR ALL

B. Install the engine air/oil heat exchanger (Ref. AMM TASK 79-21-11-400-802).

5. Close-up
Subtask 73-21-23-410-051-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) 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 73-21-23-440-051-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 73-21-23-410-052-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) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Make sure that all the circuit breakers shown in the paragraph Procedure of the engine interface unit installation are closed. If they are not, close them in the recommended sequence
(Ref. AMM TASK 73-25-34-400-802)

[Rev.10 from 2021] 2026.04.01 03:02:57 UTC