W DOC AIRBUS | AMM A320F

Operational Test of Manual Mode Selection and Manual Mode Pressure Control and Functional Test of Manual Mode Cabin Altitude/Outflow Valve Position Indication

TASK 21-31-00-710-003-A
Operational Test of Manual Mode Selection and Manual Mode Pressure Control and Functional Test of Manual Mode Cabin Altitude/Outflow Valve Position Indication

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
1. Reason for the Job
Refer to the MPD TASK: 213100-02
OPERATIONAL CHECK OF MANUAL MODE SELECTION AND MANUAL MODE PRESSURE CONTROL AND FUNCTIONAL CHECK OF MANUAL MODE CABIN ALTITUDE INDICATION AND OUTFLOW VALVE POSITION INDICATION
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
210
CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
 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 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 21-31-00-865-053-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUAIR COND/CAB/PRESS/CTL11HLD09
122VUAIR COND/CAB PRESS/CTL/MAN3HLY23
122VUAIR COND/CAB PRESS/CTL/22HLY22
Subtask 21-31-00-865-072-A
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
122VURPCU4HLX23
Subtask 21-31-00-860-055-A
C. 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 that there are no persons near the Outflow Valve (OFV) before you start this test.
4. Procedure
Subtask 21-31-00-710-053-A
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 Manual Mode Selection and Manual Mode Pressure Control and Functional Test Manual Mode Cabin Altitude / Outflow Valve Position Indication
ACTION
RESULT
1.On the CABIN PRESS panel 25VU:
  • Move the LDG ELEV selector clockwise away from the AUTO position.
On the ECAM upper display unit:
  • The green MAN LDG ELEV memo message comes on.

On the ECAM lower display unit:
  • The green AUTO xxx FT indication changes to the green MAN xxx FT indication.
NOTE: The actual manual altitude indication depends on the LDG ELEV selector position.
2.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.
  • Push and hold the MAN V/S CTL toggle switch to UP.
  • The OFV needle indication moves up.
  • Release the MAN V/S CTL toggle switch.
  • The OFV needle indication shows that the OFV is in the open position.
3.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.
4.On the CABIN PRESS panel 25VU:
  • Move the LDG ELEV selector counterclockwise to the AUTO position.
On the ECAM upper display unit:
  • The green MAN LDG ELEV memo message goes off.

On the ECAM lower display unit:
  • The green MAN xxx FT indication changes to the green AUTO xxx FT indication..
5. Close-up
Subtask 21-31-00-865-073-A
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
122VURPCU4HLX23
Subtask 21-31-00-860-056-A
B. 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] 2026.03.31 23:04:32 UTC
"Aviabrain" 2025