DOC AIRBUS | MMEL OPS PROCIgnition System B
| 74-31-02A | Ignition System B |
|---|
Applicable to: -
- Before engine start
On ground, if the FADEC selects the Ignition System B during an automatic start, the engine
fails to start and the ENG 1(2) START FAULT IGNITION FAULT alert appears
on the EWD.
Then, the FADEC automatically
initiates a second engine start attempt with both ignition systems
selected.
| 74-31-02A | Ignition System B |
|---|
Applicable to: -
- Before engine start
On ground, if the FADEC selects the Ignition System B during an automatic start, the engine
fails to start and the ENG 1(2) START FAULT IGNITION FAULT alert appears
on the EWD.
To prevent
a possible start abort with the triggering of the ENG 1(2) START FAULT IGNITION FAULT alert, perform a manual engine start. Refer to FCOM.
| 74-31-02A | Ignition System B |
|---|
Applicable to: -
- Before engine start
On ground, if the FADEC selects the Ignition System B
during an automatic start, the engine fails to start and the alert
related to the failure of the Ignition System B appears on the EWD. Then, the FADEC automatically initiates an
additional engine start attempt with both ignition systems selected.
To maximize the probability
to start the engine at the first attempt, the Ignition System A must
be selected by the FADEC. Perform one of the following
engine starts:
An automatic engine start:
Before engine start:
- ENGINE/IGN/ENG 1(2)/SYS B (121VU P41 or P42) C/BPULL
After engine start:
- ENGINE/IGN/ENG 1(2)/SYS B (121VU P41 or P42) C/BPUSH
A manual engine start:
It remains possible to perform an automatic engine start without
pulling the circuit breakers of the Ignition System B. The first start
attempt may be successful because the FADEC may select
the Ignition System A. However, the first start attempt may fail because
the FADEC may select the Ignition System B.