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Old 3rd September 2005 | 12:21
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LEM
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Joined: May 2003
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From: The Roman Empire
B737 inflight engine start

In your opinion, is there a valid reason for this apparent contradiction:

the minimum pressure is 30 psi, decreasing by half psi every 1000 feet.
That's a non AFM limitation.

So why in the Inflight engine start NNC the minimum pressure is still 30 psi?
At 20000ft, 20 psi should do, according to the previous rule, also because the shaft is already rotating - or will rotate more easily - due to the relative wind, and also the differential pressure between the duct and the atmosphere il less.




Another question: the Aborted engine start Recall Items don't seem to be applicable inflight, as the no-light up case and the apparent hung start case are covered by the cklist (still read and do, not by recall).

Only the Hot Start case is not covered.
Is it because a hot start inflight is almost impossible?
Has anyone got direct or indirect experience of a hot start inflight? (I mean in actual life, not in the sim where the boss can just push the hot start button if he likes to...)
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