W DOC AIRBUS | TSM A320F

The AP 1 Pushbutton Switch does not come on when the AP 1 is engaged

TASK 22-11-00-810-817-A
The AP 1 Pushbutton Switch does not come on when the AP 1 is engaged

1. Possible Causes
  • FCU [2CA]
  • wiring of AP 1 ENGD MON OWN and AP 1 ENGD COM OWN discretes from the FCU (2CA) to the first terminal block
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 22-10-00-710-005
Operational Test of the Indicator Lights and Displays of the FCU
AMM 22-81-12-000-001
Removal of the FCU
AMM 22-81-12-400-001
Installation of the FCU
ASM 228503
AMM 24-41-00-861-002
Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002
De-energize the Aircraft Electrical Circuits Supplied from the External Power
3. Fault Confirmation
Subtask 22-11-00-860-050-A
A. Energize the aircraft electrical circuits AMM 24-41-00-861-002.
Subtask 22-11-00-865-060-A
B. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUAUTO FLT/FCU/19CA1B05
49VUAUTO FLT/FMGC/110CA1B02
Subtask 22-11-00-710-070-A
C. Test
ACTION
RESULT
1.On the FCU:
  • push the AP 1 pushbutton switch to engage the AP 1.
This pushbutton switch comes on.
4. Fault Isolation
Subtask 22-11-00-810-066-A
A. If the AP 1 pushbutton switch does not come on:
  • do the operational test of the indicator lights and displays of the FCU AMM 22-10-00-710-005
  • make sure that the AP 1 pushbutton switch comes on.
   (1) If this pushbutton switch comes on:
     (a) If the fault continues:
  • do a check and repair the wiring of AP 1 ENGD MON OWN and AP 1 ENGD COM OWN discretes from the FCU (2CA) to the first terminal block ASM 228503.
Subtask 22-11-00-710-071-A
B. Do the test given in Para. 3.
5. Close-up
Subtask 22-11-00-860-051-A
A. De-energize the aircraft electrical circuits AMM 24-41-00-862-002.
[Rev.8 from Aug 2018] 2026.04.04 04:25:07 UTC
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