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On the ground, the EEC permits only two tries to start the engine. If the second try fails, then the autostart operation stops.
The start/ignition selector moves to the NORM position when one of these conditions occur:
*
The N2 speed gets to 41 percent

*
The EEC stops the autostart operation.

In the air, the autostart operation continues until the engine starts or you move the start/ignition selector to NORM.
Manual Start Operation
This is a brief summary of the manual start operation procedures:
*
Put the autostart switch in OFF

*
Put the engine start/ignition selector in START

*
Monitor the engine parameters for the correct indications

*
Put the fuel control switch in RUN at the maximum motoring speed.

You must monitor the manual start operation and stop the operation for a fault condition.
80-00-00

Page 25 D633W101-BEJ Sep 05/2002

ENGINE STARTING -OPERATION

Starter Cutout
The EEC closes the starter air valve when the engine gets to 41 percent N2. The valve position shows on the air synoptic display.
Training Information Point
The EEC does not use oil pressure as an input to find a starting fault.
For a manual start, if the fuel control switch is put to the RUN position at less than 15 percent N2, the caution message ENG AUTOSTART L(R) shows to tell you the start procedure is incorrect.
EFFECTIVITY BEJ ALL  80-00-00 
Page 26 
D633W101-BEJ  Sep 05/2002 

PW4000 SERIES ENGINES

777 AIRCRAFT MAINTENANCE MANUAL

ENGINE STARTING -OPERATION

EFFECTIVITY BEJ ALL  80-00-00 
Page 27 
D633W101-BEJ  Jan 05/2003 

 

 

　
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