W DOC AIRBUS | AMM A320F

Operational Test of the Residual Pressure Control Unit (RPCU)

TASK 21-31-00-710-802-A
Operational Test of the Residual Pressure Control Unit (RPCU)

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.
ZONE: 210
FIN: 9HL ** ON A/C NOT FOR ALL
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
210
CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
 B. 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 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
3. Job Set-up
Subtask 21-31-00-865-080-A ** ON A/C NOT FOR ALL
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR COND/CAB/PRESS/CTL11HLD09
122VURPCU4HLX23
122VUAIR COND/CAB PRESS/CTL/MAN3HLY23
122VUAIR COND/CAB PRESS/CTL/22HLY22
Subtask 21-31-00-860-076-A ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
   (3) On the ECAM control panel, push the PRESS pushbutton switch. The CAB PRESS page comes into view on the lower ECAM display unit.
   (4) On the AIR COND panel 30VU, make sure that:
  • The PACK 1 and the PACK 2 pushbutton switches are in the OFF position (the OFF legends are on).
  • The RAM AIR pushbutton switch is in the OFF position (the ON legend is off).
   (5) On the CABIN PRESS panel 25VU, make sure that:
  • The MODE SEL pushbutton switch is in the AUTO configuration (with the FAULT and MAN legends off).
  • The LDG ELEV selector is in the AUTO position.
  • The DITCHING pushbutton switch is in the AUTO configuration (with the ON legend off).
   (6) Make sure there are no persons near the Outflow Valve (OFV) before you start this test.
4. Procedure
Subtask 21-31-00-710-071-A ** ON A/C NOT FOR ALL
WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE OUTFLOW VALVES ARE CLEAR. MOVEMENT OF THE OUTFLOW VALVES CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
A. Operational Test of the RPCU
ACTION
RESULT
1.On the CABIN PRESS panel 25VU:
  • Push and release the MODE SEL pushbutton switch.
On the CABIN PRESS panel 25VU:
  • The white MAN pushbutton switch light comes on.
NOTE: The accuracy of the cabin altitude indication in MAN mode is +/- 1100ft.

On the ECAM lower display unit:
  • The white LDG ELEV indication and the green MAN xxx FT indication goes off.
  • The green SYS 1 (or SYS 2) indication changes to the green MAN indication.
  • Push and hold the MAN V/S CTL toggle switch to DN.
  • The OFV needle indication moves down.
  • Keep the MAN V/S CTL toggle switch to DN until the OFV needle indication starts to move up.
  • The OFV needle indication continues to move down and after a few seconds it starts to move up.
  • Release the MAN V/S CTL toggle switch.
  • The OFV needle indication continues to move up until it shows that the OFV is in the open position.
2.On the CABIN PRESS panel 25VU:
  • Push the MODE SEL pushbutton switch.
On the CABIN PRESS panel 25VU:
  • The white MAN pushbutton switch light goes off.

On the ECAM lower display unit:
  • The white LDG ELEV indication and the green MAN xxx FT indication comes on.
  • The green MAN indication changes to the green SYS 1 (or SYS 2) indication.
5. Close-up
Subtask 21-31-00-860-077-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
   (2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.02 06:48:15 UTC
"WTRUIB" 2025