W DOC AIRBUS | AMM A320F

Removal of the Pipe Assembly between the Main Heat Exchanger and the Air Cycle Machine

TASK 21-52-23-000-001-A
Removal of the Pipe Assembly between the Main Heat Exchanger and the Air Cycle Machine

WARNING: MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE. HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
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.
NOTE: The procedure for the removal of the pipe assembly is the same for the left and right side.
FIN: 10HM1
FIN: 10HM4
FIN: 11HM1
FIN: 11HM4
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
CAP - BLANKING
No specific
AR
PLUG - BLANKING
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [10HM] (PACK 1-AIR CONDITIONING)
191KB
FOR [11HM] (PACK 2-AIR CONDITIONING)
192KB
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 24-41-00-861-002-A
Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01
Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02
Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 53-35-13-000-002-A
Removal of the Quick-Release Access Panels from the Belly Fairing Structure
F Pipe Assembly - Component Location ** ON A/C NOT FOR ALL
F Pipe Assembly - Component Location ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 21-52-23-861-055-A
A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
Subtask 21-52-23-865-050-A
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 10HM (PACK 1AIR CONDITIONING)
49VUAIR COND/TEMP CTL/SYS 1 CHAN B/28VDC52HHD08
** ON A/C NOT FOR ALL
122VUAIR COND/PACK TEMP/CTL SYS1/1/115VAC1HHX22
122VUAIR COND/PACK TEMP/CTL SYS1/1/28VDC3HHX21
122VUAIR COND/PACK TEMP CTL SYS2/1/28VDC4HHY19
122VUAIR COND/PACK TEMP CTL SYS2/1/115VAC2HHY18
** ON A/C NOT FOR ALL
122VUAIR COND/TEMP CTL SYS 1/CHAN A/115VAC49HHX22
122VUAIR COND/TEMP CTL SYS 1/CHAN A/28VDC51HHX21
122VUAIR COND/TEMP CTL SYS 1/CHAN B/115VAC50HHY18
** ON A/C NOT FOR ALL
FOR FIN: 11HM (PACK 2AIR CONDITIONING)
122VUAIR COND/PACK TEMP/CTL SYS1/2/115VAC21HHW22
122VUAIR COND/PACK TEMP/CTL SYS1/2/28VDC23HHW21
122VUAIR COND/PACK TEMP CTL SYS2/2/28VDC24HHY21
122VUAIR COND/PACK TEMP CTL SYS2/2/115VAC22HHY20
** ON A/C NOT FOR ALL
122VUAIR COND/TEMP CTL SYS 2/CHAN A/115VAC53HHW22
122VUAIR COND/TEMP CTL SYS 2/CHAN A/28VDC55HHW21
122VUAIR COND/TEMP CTL SYS 2/CHAN B/28VDC56HHY21
122VUAIR COND/TEMP CTL SYS 2/CHAN B/115VAC54HHY20
Subtask 21-52-23-010-050-A
C. Get Access
   (1) Remove the access panel (Ref. AMM TASK 53-35-13-000-002):
     (a) FOR [10HM] (PACK 1-AIR CONDITIONING)
     (b) FOR [11HM] (PACK 2-AIR CONDITIONING)
Subtask 21-52-23-941-050-A
D. Safety Precautions
   (1) On the overhead panel, on AIR COND panel 30VU:
     (a) Make sure that:
  • The APU BLEED pushbutton switch is released (the ON legend is off).
  • The ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are released (the OFF legends are on).
     (b) Put the WARNING NOTICE(S) in position to tell persons not to operate these pushbutton switches.
   (2) On the HP ground connector, put the WARNING NOTICE(S) in position to tell persons not to supply the ground air.
4. Procedure
Subtask 21-52-23-020-050-A ** ON A/C NOT FOR ALL
A. Removal of the Pipe Assembly
   (1) Disconnect the electrical connectors (9) and (17).
   (2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
   (3) Disconnect the sense line connector (6).
   (4) Put the PLUG-BLANKING in each disconnected line end.
   (5) Before you remove the nuts (1), hold the hexagon part of the retaining cables (3) to prevent twisting of the retaining cables (3).
   (6) Remove and discard the nuts (1) and the washers (2) and disconnect the retaining cables (3).
   (7) Remove and discard the lockwire from the clamp (15).
   (8) Remove the clamp (15) and the half-clamps (12).
   (9) Hold the pipe assembly (21) and move the sleeve (16) away from the packings (14) onto the air-cycle machine outlet (13).
   (10) Carefully remove the pipe assembly (21) from the sleeve (4) and the air-cycle machine outlet (13).
   (11) Remove and discard the seal (5).
   (12) Remove the sleeve (16).
   (13) Remove and discard the packings (14).
   (14) Put the PLUG-BLANKING in each disconnected line end.
Subtask 21-52-23-020-050-C ** ON A/C NOT FOR ALL
A. Removal of the Pipe Assembly
   (1) Disconnect the electrical connector (6).
   (2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
   (3) Before you remove the nuts (1), hold the hexagon part of the retaining cables (3) to prevent twisting of the retaining cables (3).
   (4) Remove and discard the nuts (1) and the washers (2) and disconnect the retaining cables (3).
   (5) Remove and discard the lockwire from the clamp (13).
   (6) Remove the clamp (13) and the half-clamps (10).
   (7) Hold the pipe assembly (9) and move the sleeve (14) away from the packings (12) onto the air-cycle machine outlet (11).
   (8) Carefully remove the pipe assembly (9) from the sleeve (4).
   (9) Remove and discard the seal (5).
   (10) Remove the sleeve (14).
   (11) Remove and discard the packings (12).
   (12) Put the PLUG-BLANKING in each disconnected line end.
[Rev.10 from 2021] 2026.04.02 06:11:27 UTC
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