W DOC AIRBUS | AMM A320F

Removal of the PS12 Line [CFMI]

TASK 72-23-00-000-006-A
Removal of the PS12 Line

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL
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)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 71-13-00-010-040-A
Opening of the Fan Cowl Doors
TASK 73-21-60-000-001-A
Removal of the Electronic Control Unit (ECU)
F PS12 Line (Configuration One)
F PS12 Line (Configuration 2)
3. Job Set-up
Subtask 72-23-00-941-067-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 72-23-00-010-077-A ** ON A/C NOT FOR ALL
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 72-23-00-020-070-A ** ON A/C NOT FOR ALL
C. Remove the Electrical Control Unit (ECU) (Ref. AMM TASK 73-21-60-000-001).
4. Procedure
Subtask 72-23-00-020-056-A ** ON A/C NOT FOR ALL
A. Removal of the PS12 Line
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 lockwire which secures the PS12 connections to the fan frame nipples.
   (2) Disconnect the PS12 line from the fan frame nipples.

PRE SB 72-308

POST SB 72-338 (Configuration One)

F PS12 Line (Configuration One) ** ON A/C NOT FOR ALL
   (3) Remove the parts which attach the PS12 line to the engine as follows:
REMOVE
FROM
NOTE
Nuts (70)
Bolts (10)
Outer spring clips (20)
Inner spring clips (40)
Plastic bushings (30)
Brackets (50) and
clamps (60)
On fan frame, from the 9
o'clock to the 7 o'clock
positions (3 locations)
(Detail E)
Nuts (110)
Bolts (80)
Outer spring clips (90)
Inner spring clips (120)
Plastic bushings (130)
Brackets (100)
On flange D, from the 9
o'clock to the 10 o'clock
positions (14 locations)
(Detail F)
Nut (170)
Bolt (140)
Outer spring clip (150)
Inner spring clip (160)
Plastic bushing (190)
Brackets (180)
On flange E, at the 4:30
o'clock position
(Detail G)

PRE SB 72-338

POST SB 72-308 (Configuration 2)

F PS12 Line (Configuration 2) ** ON A/C NOT FOR ALL
   (4) Remove the parts which attach the PS12 line to the engine as follows:
REMOVE
FROM
NOTE
Nut (230)
Bolt (200)
Bracket (210) and clamp
(220)
At the 7:30 o'clock
position (Detail L)
Nuts (280)
Bolts (240)
Clamps (250)
Brackets (260) and clamps
(270)
At the 8 o'clock and 8:30
o'clock positions (Detail M)
Nuts (310)
Bolts (290)
Clamps (300)
Brackets (320)
On flange D, from the 9
o'clock to the 3:30 o'clock
positions (Detail N)
(16 locations)
Nut (340)
Bolt (330)
Bracket (350)
On flange D, at the 11:30
o'clock position (Detail P)
Nut (380)
Bolt (360)
Bracket (370)
At the 4 o'clock position
(Detail Q)
Nut (390)
Bolt (410)
Clamp (420)
Brackets (400)
On flange B, at the 4
o'clock position (Detail R)
Nut (450)
Bolt (430)
Bracket (440)
On flange D, at the 4:30
o'clock position (Detail S)
Nut (490)
Bolt (460)
Clamp (470)
Bracket (480)
On flange E, at the 4:30
o'clock position (Detail T)

END OF SB 72-308

END OF SB 72-338

   (5) Remove the PS12 line from the engine.
[Rev.10 from 2021] 2026.04.01 12:58:45 UTC
"Aviabrain" 2025