DOC AIRBUS | AMM A320FCheck for Blockage of the Burner Pressure Sensor [PW11]
TASK 73-21-23-200-801-A
Check for Blockage of the Burner Pressure Sensor
Use this procedure to make sure that the burner pressure air sense tube (AS11) has no blockage.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 73-21-23-941-054-A ** ON A/C NOT FOR ALL
Subtask 73-21-23-280-050-A ** ON A/C NOT FOR ALL
Subtask 73-21-23-410-053-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:02:58 UTC
Check for Blockage of the Burner Pressure Sensor
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.
1. Reason for the JobUse this procedure to make sure that the burner pressure air sense tube (AS11) has no blockage.
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 | 1 | AIR SOURCE - REGULATED, FILTERED, DRY |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 437AL, 438AR, 451AL | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 447AL, 448AR, 461AL | |
| 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 73-21-23-000-801-A | Removal of the Burner Pressure Sensor |
| TASK 73-21-23-000-802-A | Removal of the Burner Pressure Sense Tube (AS11) |
| TASK 73-21-23-400-801-A | Installation of the Burner Pressure Sensor |
| TASK 73-21-23-400-802-A | Installation of the Burner Pressure Sense Tube (AS11) |
| 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 |
Burner Pressure Sensor and Air Sense Tube (AS11) LocationsSubtask 73-21-23-941-054-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Do 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 73-21-23-010-058-A ** ON A/C NOT FOR ALL (1) Do 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).
B. 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
(2) Put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position.
Subtask 73-21-23-040-054-A ** ON A/C NOT FOR ALL (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
(2) Put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position.
C. Deactivation of the Thrust Reverser for Maintenance
Subtask 73-21-23-010-059-A ** ON A/C NOT FOR ALL 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 maintenance (Ref. AMM TASK 78-30-00-040-805). D. Get Access
(1) Open the left thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
4. Procedure(1) Open the left thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
Subtask 73-21-23-280-050-A ** ON A/C NOT FOR ALL
A. Do a check for blockage of the burner pressure sensor.
(b) Remove the air sense tube (AS11) (Ref. AMM TASK 73-21-23-000-802).
(c) Make sure that the regulator is adjusted to 0 psi (0.00 bar) and then connect a clean and controlled AIR SOURCE - REGULATED, FILTERED, DRY to the air sense tube (AS11).
(d) Supply 100 psi (6.89 bar) to the air sense tube (AS11).
(e) If you cannot hear air flowing through the air sense tube (AS11), replace the air sense tube (AS11) (Ref. AMM TASK 73-21-23-400-802).
(f) If necessary, install the air sense tube (AS11) (Ref. AMM TASK 73-21-23-400-802).
(g) Install the burner pressure sensor (Ref. AMM TASK 73-21-23-400-801).
(2) Examine the assembly for foreign objects, damage and correct assembly.
5. Close-upCAUTION:
WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
(1) Do a check for blockage of the burner pressure sensor and air sense tube (AS11) as follows: CAUTION:
DO NOT PUT AIR PRESSURE INTO THE BURNER PRESSURE SENSOR. IF YOU PRESSURIZE THE BURNER PRESSURE SENSOR, YOU CAN CAUSE DAMAGE TO IT.
(a) Remove the burner pressure sensor (Ref. AMM TASK 73-21-23-000-801). (b) Remove the air sense tube (AS11) (Ref. AMM TASK 73-21-23-000-802).
(c) Make sure that the regulator is adjusted to 0 psi (0.00 bar) and then connect a clean and controlled AIR SOURCE - REGULATED, FILTERED, DRY to the air sense tube (AS11).
(d) Supply 100 psi (6.89 bar) to the air sense tube (AS11).
(e) If you cannot hear air flowing through the air sense tube (AS11), replace the air sense tube (AS11) (Ref. AMM TASK 73-21-23-400-802).
(f) If necessary, install the air sense tube (AS11) (Ref. AMM TASK 73-21-23-400-802).
(g) Install the burner pressure sensor (Ref. AMM TASK 73-21-23-400-801).
(2) Examine the assembly for foreign objects, damage and correct assembly.
Subtask 73-21-23-410-053-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 left thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
Subtask 73-21-23-440-052-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the left thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 73-21-23-410-054-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).
(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).