A320 difference inflight- auto or manual start?
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Beau_Peep
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From: India
A320 difference inflight- auto or manual start?
In case of engine relight inflight - Is the procedure given in QRH for automatic start or manual start? proecdure never uses the MAN START pb. so is it autostart? but FADEC doesn't abort the start in case of any abnormality. so is it a manual start?
what is the important of the alt vs speed graph given in this procedure?
what is the important of the alt vs speed graph given in this procedure?
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From: Wanderlust
I FLY
Why would you do a manual start? In the air FADEC uses both igniters and leaves the decision to abort to you. That's all is achieved by manual start on ground. Whether to do a wind milling start or starter assisted is shown by the envelope.
Why would you do a manual start? In the air FADEC uses both igniters and leaves the decision to abort to you. That's all is achieved by manual start on ground. Whether to do a wind milling start or starter assisted is shown by the envelope.
Joined: May 2000
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From: Glorious West Sussex
FADEC decides whether to use windmilling or starter-assisted relight. It cannot abort the start, in the interests of survival.... the decision is left to the pilot.
If for some (unknown) reason the start valve does not open when you expect a starter-assist, then the MAN START pb should open it. FCOM DSC refers.
If for some (unknown) reason the start valve does not open when you expect a starter-assist, then the MAN START pb should open it. FCOM DSC refers.
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From: Wanderlust
Tyro
You are mistaking manual start with start valve manual operation. On ground when the start valve doesn't open you don't use manual start button but use supplementary procedure START VALVE MANUAL OPERATION in which the ground crew opens the valve from outside. This cannot be done in the air unless someone can go outside.
You are mistaking manual start with start valve manual operation. On ground when the start valve doesn't open you don't use manual start button but use supplementary procedure START VALVE MANUAL OPERATION in which the ground crew opens the valve from outside. This cannot be done in the air unless someone can go outside.
Thread Starter
Beau_Peep
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From: India
If the start valve fails to open automatically in air in case of starter-assisted engine relight, it means that the only option left with the pilot is to speed up and hope for windmill relight.
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From: Wanderlust
Tyro
I am talking about your following sentence:
If for some (unknown) reason the start valve does not open when you expect a starter-assist, then the MAN START pb should open it.
This is not correct. Failed start valve cannot be opened in flight. Even in dual engine flame out you only attempt auto starts.
I am talking about your following sentence:
If for some (unknown) reason the start valve does not open when you expect a starter-assist, then the MAN START pb should open it.
This is not correct. Failed start valve cannot be opened in flight. Even in dual engine flame out you only attempt auto starts.
Last edited by vilas; 10th August 2014 at 16:41.
Joined: May 2000
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From: Glorious West Sussex
If for some (unknown) reason the start valve does not open
I was merely pointing out that according to FCOM it is possible to do a manual start- assisted relight.
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From: Pprune server
Man start
If the start valve is faulty and wont open, the man start procedure is useless both in ground or in flight. FCOM PRO-ABN-70 P 29/68.
But like tyro said, it is possible to do man start in-flight. But why would that be the case?
But like tyro said, it is possible to do man start in-flight. But why would that be the case?
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From: Wanderlust
Just as I said in my first post auto start in air gives you exactly what manual start does on ground. Actually manual start is meant for use on ground but remains available in the air that's all, because in dual engine flame out even with repeated failure s to light up ECAM/QRH does not mention anything about manual start.
Joined: Jul 2006
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From: Somewhere over the rainbow
Manual start you control the cranking time with the ENG man start p/b and control when to ignite the engines and send fuel ( With ENG Master sw to ON) and both igniters will be ON increasing your chance of a successful engine start.
For IAE engines, manual Start is recommended when:
**Tailwind greater than 10 kt.
** After aborting a start because of engine EGT over limit or low start air pressure or no N1 rotation or hung start.
** When expecting a start abort because of degraded bleed performance due to hot conditions or high altitude airports.
**Marginal performance or the external pneumatic power.
During manual start, the crew must pay attention to the starter limitations and since the FADEC has limited control, the crew must monitor the engine acceleration and be ready to abord the start if required as the FADEC has no authority to abort the start.
Last edited by pineteam; 2nd June 2022 at 07:07. Reason: added one sentence
