DOC AIRBUS | TSM A320FLoss of the SMOKE Legend on the EMER ELEC PWR/GEN 1 LINE Pushbutton Switch
TASK 26-15-00-810-802-A
Loss of the SMOKE Legend on the EMER ELEC PWR/GEN 1 LINE Pushbutton Switch
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 26-15-00-865-050-A
Subtask 26-15-00-810-051-A
Subtask 26-15-00-860-050-A
[Rev.8 from Aug 2018]
2026.04.04 04:27:18 UTC
Loss of the SMOKE Legend on the EMER ELEC PWR/GEN 1 LINE Pushbutton Switch
1. Possible Causes
- P/BSW-EMER ELEC PWR/GEN1 LINE [13XU]
wiring of the pushbutton switch (13XU) - BOARD-ANN LT TEST & INTFC [8LP]
wiring of the annunciator light test and interface board (8LP)
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ESPM 2045110 | |
| AMM 21-26-00-710-001 | Operational Check of the Avionics Equipment Ventilation-System via MCDU |
| ASM 261501 | |
| AMM 33-14-33-000-001 | Removal of the Annunciator-Light Test and Interface-Board |
| AMM 33-14-33-400-001 | Installation of the Annunciator-Light Test and Interface-Board |
Subtask 26-15-00-865-050-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
Subtask 26-15-00-710-052-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 122VU | LIGHTING/TST/BOARD/SPLY | 30LP | X06 |
B. Test
Do the operational test of the avionics equipment ventilation from the Multipurpose Control and Display Unit (MCDU) AMM 21-26-00-710-001.
4. Fault IsolationDo the operational test of the avionics equipment ventilation from the Multipurpose Control and Display Unit (MCDU) AMM 21-26-00-710-001.
Subtask 26-15-00-810-051-A
A. If during the test, the SMOKE legend of the EMER ELEC PWR/GEN 1 LINE pushbutton switch does not come on:
Subtask 26-15-00-710-053-A - on the panel 25VU, set the ANN LT switch to TEST and do a check to see if the SMOKE legend of the GEN 1 LINE pushbutton switch comes on.
- replace the P/BSW-EMER ELEC PWR/GEN1 LINE [13XU] ESPM 2045110
- do a check and repair the
wiring of the pushbutton switch (13XU) from pin A/8 to the first terminal block and from pin A/7 to the pin A/18 of the annunciator light test and interface board (8LP) ASM 261501.
- replace the BOARD-ANN LT TEST & INTFC [8LP] AMM 33-14-33-000-001 and AMM 33-14-33-400-001.
- do a check and repair the
wiring of the annunciator light test and interface board (8LP) from pins A/34 and A/35 to the first terminal block ASM 261501.
B. Do the test given in Para. 3.
5. Close-upSubtask 26-15-00-860-050-A
A. Put the aircraft back to its initial configuration.
(1) On the panel 25VU, set the ANN LT switch to BRT.
(1) On the panel 25VU, set the ANN LT switch to BRT.