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Maniac59

F/D arming

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When is the correct time to arm the F/D during pre departure?

 

Depends on the airline SOP.  In order to satisfy turning them on pre-departure, any time from when the aircraft is powered to the point where you're sitting short of the runway is fine.

 

I turn mine on as part of my pre-start setup.

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Oh ok.. because I recently had a sitiuation where the A/P would not engage after lift off.

I had to switch both F/D's off and on and then it would arm.

I thought maybe I was arming the F/D's too early at the gate before p/s....

 

Maniac59

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Oh ok.. because I recently had a sitiuation where the A/P would not engage after lift off.

I had to switch both F/D's off and on and then it would arm.

I thought maybe I was arming the F/D's too early at the gate before p/s....

 

Maniac59

 

Probably a coincidence, did you have both a lateral and vertical mode selected before turning the AP on? Were your controls centered?

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Hi Steven.  Yes noth VNAV & LNAV were armed and controls centered before attempting to arm the A/P.

 

 

Maniac

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