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Forum: Tech Log

5th Aug 2018, 04:53

Replies: 11

744 Start Issue

Views: 2,450

Posted By CCA

A bit rusty on the 744 I believe the valve closes...

A bit rusty on the 744 I believe the valve closes to help prevent an auto shutdown so I guess as soon as the signal from the eng start lever is received and the APU begins its ramp up for the 40psi...

Forum: Tech Log

5th Aug 2018, 02:13

Replies: 11

744 Start Issue

Views: 2,450

Posted By CCA

I'm guessing it's closing for auto shutdown...

I'm guessing it's closing for auto shutdown protection any CMC message? I remember on the classic it was easy to cause an auto shutdown due to a rapid EGT rise by placing tto much demand on the bleed...

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