W DOC AIRBUS | AMM A320F

Pressure Drop Test of the Reheater

TASK 21-52-00-780-001-A
Pressure Drop Test 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.
FIN: 10HM3
FIN: 11HM3
1. Reason for the Job
Referenced from TSM.
This procedure is only applicable to reheaters with the P/N 755A0000-04 and previous.
It is not applicable to reheaters with the P/N's 755A0000-04 Amendment A or subsequent.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
CAP - BLANKING
No specific
1
GAGE 10 BAR (145 PSI) - PRESSURE
No specific
AR
HOSE - BLEED
No specific
1
LOCALLY MANUFACTURED - ADAPTER
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
VALVE - 3 WAYS
No specific
Torque wrench: range to between 0.55 and 0.45 m.daN (48.67 and 39.82 lbf.in ) T
No specific
Torque wrench: range to between 1.0 and 0.5 m.daN (88.50 and 44.25 lbf.in ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.14QFB1)
Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
 C. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
2
PACKING
AIPC 21-61-03-05-040
2
PACKING
AIPC 21-61-83-13-040
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 12-33-21-618-001-A-01
Pre-conditioning through the HP Ground Connection
TASK 12-33-21-618-001-A-02
Pre-conditioning with the APU
TASK 21-52-00-100-002-A
Remove Reheater for In Shop Cleaning
TASK 21-52-31-000-001-A
Removal of the Reheater
TASK 21-52-31-400-001-A
Installation of the Reheater
TASK 21-61-00-710-001-A
Operational Test of the Pack Temperature-Control System
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 24-41-00-862-002-A
De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01
De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02
De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-60-00-860-001-A
EIS Start Procedure
TASK 31-60-00-860-002-A
EIS Stop Procedure
TASK 49-00-00-860-005-A
APU Start by External Power
TASK 49-00-00-860-005-A-01
APU Start by Batteries
TASK 49-00-00-860-006-A
APU Shutdown by External Power
TASK 49-00-00-860-006-A-01
APU Shutdown by Batteries
TASK 49-00-00-860-008-A
APU Start by External Power
TASK 49-00-00-860-008-A-01
APU Start by Batteries
TASK 49-00-00-860-009-A
APU Shutdown by External Power (131-9(A))
TASK 49-00-00-860-009-A-01
APU Shutdown by Batteries (131-9(A))
TASK 53-35-13-000-002-A
Removal of the Quick-Release Access Panels from the Belly Fairing Structure
TASK 53-35-13-400-002-A
Installation of the Quick-Release Access Panels on the Belly Fairing Structure
F Differential Pressure Test Connection Points
3. Job Set-up
Subtask 21-52-00-861-056-A
A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
Subtask 21-52-00-865-061-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 21-52-00-941-051-A
C. Safety Precautions
NOTE: You must obey these precautions before you carry out any removal or installation tasks.
   (1) On the panel 30VU:
     (a) Make sure that the APU BLEED and the ENG BLEED/1(2) pushbutton switches are released.
     (b) Put a warning notice in position to tell persons not to operate these pushbutton switches.
   (2) On the HP ground connector put a warning notice in position to tell persons not to supply the ground air.
Subtask 21-52-00-010-056-A
D. Get Access
   (1) Remove the access panel/s (Ref. AMM TASK 53-35-13-000-002).
     (a) FOR [10HM3] (REHEATER)
  • 191KB.
     (b) FOR [11HM3] (REHEATER)
  • 192KB.
4. Procedure
WARNING: DO NOT TOUCH THE COMPONENT UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS.
Subtask 21-52-00-480-050-A
A. Installation of the Test Equipment
   (1) Disconnect the electrical connector (4).
   (2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
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.
   (3) Remove and discard the lockwire and remove the temperature sensor (5), the sealing plug (1) and the packings (2).
   (4) Put the packings (2) in position on the LOCALLY MANUFACTURED - ADAPTER (6).
NOTE: You can use modified threaded plugs to make the adaptors.
The maximum 37.0 mm (1.4567 in.) dimension is necessary.
   (5) Put the adaptors (6) in position in the pressure tapping port (3) and in the temperature sensor port (10).
   (6) Connect the HOSE - BLEED to the adaptors (6) and to the VALVE - 3 WAYS.
   (7) Connect a GAGE 10 BAR (145 PSI) - PRESSURE to the three-way valve (9).
NOTE: Make sure that the pressure gauge (8) can measure to 40 psi (2.7579 bar).
Subtask 21-52-00-865-067-A
B. Remove the safety clip(s) and the tag(s) and close 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 21-52-00-860-059-A
C. Do the start procedure of the APU:
Subtask 21-52-00-860-051-A ** ON A/C NOT FOR ALL
D. Aircraft Maintenance Configuration
   (1) Do the EIS start procedure (Ref. AMM TASK 31-60-00-860-001).
     (a) On the ECAM upper display unit (DU) the warning AIR PACK REGUL. FAULT will be displayed. You must ignore this warning.
   (2) On the panel 30VU:
     (a) Make sure that the PACK FLOW selector is at the NORM position.
     (b) Turn the COCKPIT, FWD CABIN and the AFT CABIN temperature selectors to the COLD position.
     (c) Make sure that the X BLEED selector is in the AUTO position and that the HOT AIR pushbutton switch is off (shows OFF legend on).
     (d) Select the respective air condition pack:
       1 FOR [10HM3] (REHEATER)
         a On the panel 30VU push the PACK 1 pushbutton switch to the on position (shows FAULT and OFF legends off).
         b On the ECAM control panel push the BLEED pushbutton switch.
         c On the ECAM lower DU monitor the pack 1 outlet temperature ( 15 deg.C (59.00 deg.F)) and the pack 1 bleed pressure.
         d Wait for 5 minutes to allow the pack 1 outlet temperature and the pack 1 bleed pressure to stabilize.
NOTE: Start the test measurement as soon as possible.

       2 FOR [11HM3] (REHEATER)
         a On the panel 30VU push the PACK 2 pushbutton switch to the on position (shows FAULT and OFF legends off).
         b On the ECAM control panel push the BLEED pushbutton switch.
         c On the ECAM lower DU monitor the pack 2 outlet temperature ( 15 deg.C (59.00 deg.F)) and the pack 2 bleed pressure.
         d Wait for 5 minutes to allow the pack 2 outlet temperature and the pack 2 bleed pressure to stabilize.
NOTE: Start the test measurement as soon as possible.
Subtask 21-52-00-860-051-B ** ON A/C NOT FOR ALL
D. Aircraft Maintenance Configuration
   (1) Do the EIS start procedure (Ref. AMM TASK 31-60-00-860-001).
     (a) On the ECAM upper display unit (DU) the warning AIR PACK REGUL. FAULT will be displayed. You must ignore this warning.
   (2) On the panel 30VU:
     (a) Make sure that on the ECON FLOW switch the ON legend is not shown.
     (b) Turn the COCKPIT, FWD CABIN and the AFT CABIN temperature selectors to the COLD position.
     (c) Make sure that the X BLEED selector is in the AUTO position and that the HOT AIR pushbutton switch is off (shows OFF legend on).
     (d) Select the respective air condition pack:
       1 FOR [10HM3] (REHEATER)
         a On the panel 30VU push the PACK 1 pushbutton switch to the on position (shows FAULT and OFF legends off).
         b On the ECAM control panel push the BLEED pushbutton switch.
         c On the ECAM lower DU monitor the pack 1 outlet temperature ( 15 deg.C (59.00 deg.F)) and the pack 1 bleed pressure.
         d Wait for 5 minutes to allow the pack 1 outlet temperature and the pack 1 bleed pressure to stabilize.
NOTE: Start the test measurement as soon as possible.

       2 FOR [11HM3] (REHEATER)
         a On the panel 30VU push the PACK 2 pushbutton switch to the on position (shows FAULT and OFF legends off).
         b On the ECAM control panel push the BLEED pushbutton switch.
         c On the ECAM lower DU monitor the pack 2 outlet temperature ( 15 deg.C (59.00 deg.F)) and the pack 2 bleed pressure.
         d Wait for 5 minutes to allow the pack 2 outlet temperature and the pack 2 bleed pressure to stabilize.
NOTE: Start the test measurement as soon as possible.
Subtask 21-52-00-780-050-A
E. Pressure Drop Test
NOTE: To avoid ice build up at the turbine outlet it is recommended that the test does not last more than 10 minutes.
   (1) Open the three-way valve (9) to the upstream pressure (Y) position.
   (2) Make a note of the upstream pressure (Y) as shown on the pressure gauge (8).
   (3) Open the three-way valve (9) to the downstream pressure (X) position.
   (4) Make a note of the downstream pressure (X) as shown on the pressure gauge (8).
   (5) Subtract the downstream pressure (X) from the upstream pressure (Y) to give you the pressure difference.
   (6) If the pressure difference is:
     (a) below 1.5 psi (0.1034 bar) no corrective action is required.
     (b) between 1.5 psi (0.1034 bar) and 2.0 psi (0.1379 bar) you must clean the reheater (11) (Ref. AMM TASK 21-52-00-100-002).
     (c) more than 2.0 psi (0.1379 bar) you must replace the reheater (11) (Ref. AMM TASK 21-52-31-000-001) and (Ref. AMM TASK 21-52-31-400-001).
Subtask 21-52-00-860-052-A
F. Aircraft Maintenance Configuration
   (1) Do the stop procedure of the APU:
   (2) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
Subtask 21-52-00-865-068-A
G. 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 21-52-00-080-050-A
H. Removal of the Test Equipment
   (1) Carefully disconnect the hoses (7), the three-way valve (9) and the pressure gauge (8).
NOTE: You must slowly disconnect the hoses (7) to release any residual pressure which may be present in the test system.
   (2) Remove the adaptors (6) and discard the packings (2).
   (3) Clean the component interfaces and the adjacent area.
   (4) Put a new AIPC 21-61-03-05-040 PACKING (2) or AIPC 21-61-83-13-040 PACKING (2) on the sealing plug (1) and on the temperature sensor (5).
   (5) Install the sealing plug (1) in the pressure tapping port (3) and the pressure sensor (5) in the pressure sensor port (10).
   (6) TORQUE the sealing plug (1) to between 0.55 and 0.45 m.daN (48.67 and 39.82 lbf.in ) T.
   (7) TORQUE the temperature sensor (5) to between 1.0 and 0.5 m.daN (88.50 and 44.25 lbf.in ) T.
   (8) Safety the sealing plug (1) and the temperature sensor (5) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
   (9) Remove the blanking caps from the disconnected electrical connectors.
   (10) Make sure that all the electrical connections are clean and in the correct condition.
   (11) Connect the electrical connector (4)
   (12) Make sure that the work area is clean and clear of tools and other items.
Subtask 21-52-00-865-082-A
I. Remove the safety clip(s) and the tag(s) and close 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 21-52-00-860-053-A
J. Pre-conditioning and Leak Check
   (1) Do the pre-conditioning through the APU (Ref. AMM TASK 12-33-21-618-001) or the HP ground connector (Ref. AMM TASK 12-33-21-618-001).
   (2) Do a check for leaks at the sealing plug (1) and at the temperature sensor (5).
Leaks are not permitted.
   (3) Stop the pre-conditioning.
Subtask 21-52-00-710-053-A
K. Do the operational test of the pack temperature control system (Ref. AMM TASK 21-61-00-710-001).
5. Close-up
Subtask 21-52-00-410-054-A
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the access panel/s (Ref. AMM TASK 53-35-13-400-002).
     (a) FOR [10HM3] (REHEATER)
  • 191KB.
     (b) FOR [11HM3] (REHEATER)
  • 192KB.
   (3) Remove the WARNING NOTICE(S).
Subtask 21-52-00-862-055-A
B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.02 06:11:24 UTC
"WTRUIB" 2025