DOC AIRBUS | AMM A320FRemoval of the PS12 Line [CFMB]
TASK 72-23-00-000-040-A
Removal of the PS12 Line
1. Reason for the Job
Self explanatory
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 72-23-00-941-083-A ** ON A/C NOT FOR ALL
Subtask 72-23-00-020-066-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:41:41 UTC
Removal of the PS12 Line
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-040-B | Opening of the Fan Cowl Doors |
| TASK 73-21-60-000-001-B | Removal of the Electronic Control Unit (ECU) |
Removal/Installation of the PS12 LineSubtask 72-23-00-941-083-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 72-23-00-010-106-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 72-23-00-020-072-A ** ON A/C NOT FOR ALL 4. Procedure(1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 72-23-00-020-066-A ** ON A/C NOT FOR ALL
A. Removal of the PS12 Line
(2) Disconnect the PS12 line from the 3 fan frame bosses.
(3) Remove the parts which attach the PS12 Line as follows:
(4) Remove the PS12 line (20) from the engine.
CAUTION:
USE 2 WRENCHES TO REMOVE/INSTALL THE TUBE UNION NUT: ONE TO HOLD THE FITTING, THE OTHER TO LOOSE/TORQUE THE NUT. OTHERWISE, DAMAGE TO THE HARDWARE CAN OCCUR.
(1) Cut and remove the lockwires. (2) Disconnect the PS12 line from the 3 fan frame bosses.
(3) Remove the parts which attach the PS12 Line as follows:
| REMOVE | FROM | NOTE |
|---|---|---|
| Nut (30) Bolt (10) | Bracket (40) on flange G | At the 5 o'clock position (Detail C) |
| Nut (70) Bolt (50) Clamp (60) | Bracket (80) on flange E | At the 4:45 o'clock position (Detail D) |
| Nut (110) Bolt (90) Clamp (100) | Bracket (120) on flange C | At the 4:30 o'clock position (Detail E) |
| Nut (150) Bolt (130) | Bracket (140) on flange C | At the 4 o'clock position (Detail F) |
| Nuts (180) Bolts (190) Clamps (160) | Brackets (170) on flange C | From the 3:30 o'clock to the 1:45 O'clock positions (Detail G) (5 locations) |
| Nut (230) Bolt (200) Clamp (210) | Bracket (220) on flange C | From the 1 o'clock to the 8:15 o'clock positions (Detail H) (12 locations) |
| Nut (260) Bolt (240) | Bracket (250) on flange C | At the 11:45 o'clock position (Detail J) |
| Nut (290) Bolt (270) | Bracket (280) on flange C | At the 8 o'clock position (Detail K) |
(4) Remove the PS12 line (20) from the engine.