W DOC AIRBUS | AMM A320F

Removal of the PS12 Line and Sensor [CFML]

TASK 73-21-65-000-802-A
Removal of the PS12 Line and Sensor

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.
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)
No specific
AR
CAP - PROTECTION
No specific
AR
COVER - PROTECTION
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 71-13-00-010-803-A
Opening of the Fan Cowl Doors
F Right PS12 Sensor
F Left PS12 Sensor
3. Job Set-up
Subtask 73-21-65-941-054-A
A. Safety Precautions
   (1) 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.
   (2) 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).
Subtask 73-21-65-010-054-A
B. 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
   (2) Put an ACCESS PLATFORM 1M(3 FT) in position.
4. Procedure
Subtask 73-21-65-020-052-A
A. Removal of the PS12 Line and Sensor
   (1) Removal of the right PS12 sensor (1).
F Right PS12 Sensor
     (a) Cut and discard the safetywire.
WARNING: USE PROTECTIVE 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.
       1 Cut and discard the safetywire from the coupling-nut (2).
     (b) Loosen the coupling-nut (2) of the PS12 tube (3).
     (c) Remove the bolts (4) of the clamps (6).
     (d) Remove the bolts (5) of the clamps (7).
     (e) Loosen the coupling-nut (8) of the PS12 hose (9).
     (f) Move carefully the PS12 tube (3).
     (g) Loosen the PS12 sensor (1).
     (h) Remove the PS12 sensor (1).
     (i) Remove and discard the O-ring (10) from the groove of the PS12 sensor (1).
   (2) Removal of the left PS12 sensor (11).
F Left PS12 Sensor
     (a) Cut and discard the safetywire.
WARNING: USE PROTECTIVE 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.
       1 Cut and discard the safetywire from the coupling-nut (12).
     (b) Loosen the coupling-nut (12) of the PS12 tube (13).
     (c) Move carefully the PS12 tube (13).
     (d) Loosen the PS12 sensor (11).
     (e) Remove the PS12 sensor (11).
     (f) Remove and discard the O-ring (14) from the groove of the PS12 sensor (11).
   (3) Install the COVER - PROTECTION and CAP - PROTECTION on all the openings, tubes, hoses and connectors.
[Rev.10 from 2021] 2026.04.01 13:03:59 UTC
"Aviabrain" 2025