A320 starter limitation
Thread Starter
Joined: Apr 2006
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From: Asia
A320 starter limitation
Hi
Lets say the fadec turns the engine for two and a half minutes with the starter valve open due to a hot start as ive seen on the simulator. In such a case how do we continue to deal with the remaining start attempts?
Thanks
IAE 2527 A5 i think
Lets say the fadec turns the engine for two and a half minutes with the starter valve open due to a hot start as ive seen on the simulator. In such a case how do we continue to deal with the remaining start attempts?
Thanks
IAE 2527 A5 i think
Thread Starter
Joined: Apr 2006
Posts: 529
Likes: 0
From: Asia
The starter limitation was exceeded by 30 sec, what do we follow now. Is it ok to split the 4 minutes of continous cranking and use them for another start attmpt?
Why is the fadec exceeding the starter limitation to perform a dry crank.
Why is the fadec exceeding the starter limitation to perform a dry crank.
Joined: Oct 2009
Posts: 1,270
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From: UK
Hi
Probably to protect the engine.
After a hot start, the FADEC will crank the engine until the EGT is below a certain threshold. If it requires a slightly longer cranking time than the starter motor limitation, then it is still the cheaper option. (Life of starter motor has probably been reduced).
In your example, I'd pause for at least 20 secs before the next start attempt, and limit myself to only 3 consecutive cycles before the 15 mins cool down. I'd make a tech log entry "starter motor cranking limit exceeded by 30 secs on first attempt" or something like it.
Edit (CFM engine limitations - don't have IAEs)
Why is the fadec exceeding the starter limitation to perform a dry crank.
After a hot start, the FADEC will crank the engine until the EGT is below a certain threshold. If it requires a slightly longer cranking time than the starter motor limitation, then it is still the cheaper option. (Life of starter motor has probably been reduced).
In your example, I'd pause for at least 20 secs before the next start attempt, and limit myself to only 3 consecutive cycles before the 15 mins cool down. I'd make a tech log entry "starter motor cranking limit exceeded by 30 secs on first attempt" or something like it.
Edit (CFM engine limitations - don't have IAEs)
Last edited by rudderrudderrat; 25th July 2011 at 07:00. Reason: CFM
Joined: Apr 2011
Posts: 31
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From: In-between
The way I would interpret it-
You have one last attempt left after 15 secs of pause- (max 1min 30 secs cycle).
If no joy, 30min cooling, call up maintenance.
Good thing not to interrupt FADEC even it exceeds crank limit.
You have one last attempt left after 15 secs of pause- (max 1min 30 secs cycle).
If no joy, 30min cooling, call up maintenance.
Good thing not to interrupt FADEC even it exceeds crank limit.
