DOC AIRBUS | AMM A320FSWITCHING - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
This chapter describes the switching procedures that are necessary to start the engines.
The ignition system is controlled by the:
** ON A/C NOT FOR ALL This chapter describes the switching procedures that are necessary to start the engines.
Wiring DiagramThe ignition system is controlled by the:
- Electronic Engine Control (EEC)
- Engine Interface Unit (EIU)
- ENG START panel 115VU (ENG/MASTER 1 control switch and ENG/MODE/CRANKINORM/IGN/START selector switch)
- Overhead panel (selection of manual starting).
2. Component Description
A. ENG START Panel (115VU)
ENG START panel (115VU) is located on the center pedestal in the cockpit.
ENG START panel (115VU) is located on the center pedestal in the cockpit.
(1) ENG/MODE/CRANKINORM/IGN/START selector switch
This switch is same for both the engines and can be put in any of these three positions:
This switch is same for both the engines and can be put in any of these three positions:
- CRANK
- NORM
- IGN/START.
(a) CRANK position
In this position, no ignition system is supplied but an engine dry motoring is possible.
In this position, no ignition system is supplied but an engine dry motoring is possible.
(b) MODE/NORM position
This position is selected by the pilot at the end of the starting sequence. In this position the FADEC can select continuous ignition for some flight conditions (i.e. icing, EIU failure).
This position is selected by the pilot at the end of the starting sequence. In this position the FADEC can select continuous ignition for some flight conditions (i.e. icing, EIU failure).
(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 the OFF position :
- The HP fuel shut off valve will be in close position
- The engine will be stopped.
This position of the master control switch overrides the ECU function.
(b) The master control switch in ON position enables:
- Normal starting procedure (automatic)
- Alternate starting procedure (manual)
- Wet crank procedure
- Normal operation.
(3) Two annunciator FAULT legends
An amber annunciator FAULT legend dedicated to each engine is supplied by the EIU when a:
An amber annunciator FAULT legend dedicated to each engine is supplied by the EIU when a:
- Starting failure is detected in auto mode
- Disagreement occurs between the HP fuel shut off valve and the control.
(4) Two fire warning lights:
A red warning light dedicated to each engine is supplied by the Fire Detection Unit (FDU) when a fire occurs.
A red warning light dedicated to each engine is supplied by the Fire Detection Unit (FDU) 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 start procedure only.
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 start procedure only.