W DOC AIRBUS | AMM A320F

Removal of the Reheater

TASK 21-52-31-000-001-A
Removal of the Reheater

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: DO NOT TOUCH THE UNIT UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).
CAUTION: BE VERY CAREFUL WHEN YOU DO WORK ON OR NEAR THE AIR-CONDITIONING DUCTS. THE DUCTS ARE MADE OF THIN MATERIAL AND YOU CAN EASILY BREAK THEM.
NOTE: The procedure is the same for reheaters 10HM3 and 11HM3.
FIN: 10HM3
FIN: 11HM3
1. Reason for the Job
Two persons are necessary to do this task.
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
1
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [10HM3] (REHEATER)
191KB
FOR [11HM3] (REHEATER)
192KB
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 21-52-16-000-001-A
Removal of the Water Extractor
TASK 21-52-23-000-003-A
Removal of the Pipe Assembly between the Anti-Ice Valve (if installed) and the Bypass Air Duct of the Primary Heat Exchanger
TASK 21-52-31-200-001-A
Attachment Components (In-Service Wear Limits) - Reheater
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 Reheater
F Attachment Components - Reheater
3. Job Set-up
Subtask 21-52-31-861-051-A
A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 21-52-31-865-050-A
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 10HM3 (REHEATER)
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: 11HM3 (REHEATER)
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 21-52-31-941-050-A
C. 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 a 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.
Subtask 21-52-31-010-050-A ** ON A/C NOT FOR ALL
D. Get Access
   (1) Remove the access panels from the belly fairing structure (Ref. AMM TASK 53-35-13-000-002):
     (a) FOR [10HM3] (REHEATER)
     (b) FOR [11HM3] (REHEATER)
   (2) Remove the water extractor (Ref. AMM TASK 21-52-16-000-001):
     (a) FOR [10HM3] (REHEATER)
  • 10HM8.
     (b) FOR [11HM3] (REHEATER)
  • 11HM8.
   (3) Remove the pipe assembly (Ref. AMM TASK 21-52-23-000-003).
Subtask 21-52-31-010-050-B ** ON A/C NOT FOR ALL
D. Get Access
   (1) Remove the access panels from the belly fairing structure (Ref. AMM TASK 53-35-13-000-002):
     (a) FOR [10HM3] (REHEATER)
     (b) FOR [11HM3] (REHEATER)
   (2) Remove the water extractor (Ref. AMM TASK 21-52-16-000-001):
     (a) FOR [10HM3] (REHEATER)
  • 10HM8.
     (b) FOR [11HM3] (REHEATER)
  • 11HM8.
4. Procedure
Subtask 21-52-31-020-051-A
A. Removal of the Reheater
F Reheater
   (1) Disconnect the electrical connector (25):
CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
     (a) Disconnect the electrical connector (25).
     (b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
CAUTION: MAKE SURE THAT THE ELECTRICAL WIRE(S) IS(ARE) DISCONNECTED BEFORE YOU DISCONNECT THE BONDING STRAP(S).
   (2) If applicable, disconnect the bonding strap (30) from the reheater (12):
NOTE: The bonding strap (30) is only applicable for the pack-air conditioning system with the anti-ice valve.
     (a) For the reheater (12) with the bonding tab:
  • Remove the nut (31), the washer (34) and the screw (19) and disconnect the bonding strap (30).
     (b) For the reheater (12) with the riveted nut:
  • Remove the screw (19) and the washer (34) and disconnect the bonding strap (30).
   (3) Hold the hexagonal part of the retaining cables (18) and (27) and remove and discard the nuts (13) and the washers (14).
NOTE: The retaining cables (18) and (27) will twist, if you do not hold the hexagonal part of the retaining cables (18) and (27).
   (4) Disconnect the retaining cables (18) and (27).
   (5) Remove the screw of the clamps (35), and bend the clamps (35) carefully to remove them.
   (6) Remove the sleeves (17) and (26) from the flanges (15) and (29):
     (a) Turn the sleeves (17) and (26) when you disconnect them.
   (7) Remove the nut (8), the washer (9) and the screw (11) and disconnect the bonding strap (10).
   (8) Remove the clamp (22).
   (9) Remove the nuts (4) and the washers (5).
   (10) Hold the reheater (12):
     (a) Remove the bolts (7) and the bushings (6).
     (b) Disconnect the support rods (77) and (81) and remove the reheater (12) from the aircraft.
   (11) Remove and discard the seals (16) and (28), and the packing (23).
   (12) Put the PLUG-BLANKING in each disconnected line end.
Subtask 21-52-31-020-052-A
B. Removal of the Attachment Components
F Attachment Components - Reheater
   (1) Record the positions of the support rods to use in the Installation procedure.
   (2) Hold the support rods (77) and (81) and remove the nuts (4), washers (5), bolts (7) and bushings (6).
   (3) Remove the support rods (77) and (81) from the bracket (20).
   (4) Do the inspection of the components for in-service wear (Ref. AMM TASK 21-52-31-200-001).
[Rev.10 from 2021] 2026.04.02 06:11:29 UTC
"WTRUIB" 2025