DOC AIRBUS | AMM A320FSWITCHING - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The ignition system is controlled by : the EEC upon commanded signals from ENG START panel 115VU through the EIU.
** ON A/C NOT FOR ALL The ignition system is controlled by : the EEC upon commanded signals from ENG START panel 115VU through the EIU.
2. Description
A. ENG Panel (115VU)
Engine start panel is located on the center pedestal in the cockpit.
It is composed of:
Engine start panel is located on the center pedestal in the cockpit.
It is composed of:
(1) ENG/MODE selector switch
It is common to both engines and can be placed in any of the three position CRANK, NORM, and IGN/START.
It is common to both engines and can be placed in any of the three position CRANK, NORM, and IGN/START.
(a) CRANK position
In CRANK position no ignition system is supplied but an engine dry motoring is allowed.
In CRANK position no ignition system is supplied but an engine dry motoring is allowed.
(b) NORM position
This position is selected by the pilot at the end of starting sequence or after engine shutdown on ground. In this position the EEC selects automatically the continuous ignition in some specific configurations:
This position is selected by the pilot at the end of starting sequence or after engine shutdown on ground. In this position the EEC selects automatically the continuous ignition in some specific configurations:
- while the engine is running and the air intake cowl anti-icing is selected to ON or the EIU controlled ignition is failed or during take-off or during flexible take off or when the approach idle has been selected.
- in flight, when there is an engine flameout or stall.
(c) IGN/START position
This position is selected for:
This position is selected for:
- normal starting procedure (automatic)
- alternate starting procedure (manual)
- continuous ignition after starting sequence
(2) Two ENG/MASTER control switches
There is a MASTER control switch for each engine.
There is a MASTER control switch for each engine.
(a) With the MASTER control switch in OFF position:
- the HP fuel shut off valve is closed
- the engine is stopped
(b) The MASTER control switch in ON position enables:
- normal starting procedure (automatic)
- alternate starting procedure (manual)
- wet crank procedure
- normal operation.
(3) Two FAULT legends on the ENG1 and 2 annunciators
one amber FAULT legend dedicated to each engine is supplied by the EIU when:
one amber FAULT legend dedicated to each engine is supplied by the EIU when:
- a starting failure is detected in AUTO MODE
- or a desagreement occurs between the HP fuel shut off valve actual position and the commanded position.
(4) Two FIRE legends on the ENG1 and 2 annunciators
one red FIRE legend dedicated to each engine is supplied by the FDU (Fire Detection Unit) when a fire occurs.
one red FIRE legend dedicated to each engine is supplied by the FDU (Fire Detection Unit) when a fire occurs.
B. ENG/MAN START Section of Panel 22VU
It is located on the overhead panel in the cockpit.
There are two pushbutton switches, one for each engine. Each pushbutton switch serves for the manual starting procedure only.
It is located on the overhead panel in the cockpit.
Component LocationThere are two pushbutton switches, one for each engine. Each pushbutton switch serves for the manual starting procedure only.