737-800 Autothrottle Question
Hello all,
The other day I was taxiing out and when cleared to position I went to engage the Autothrottle and it wouldn't arm.
-FD's were on.
-TOGA Takeoff
-CDU preflight was complete ie.ZFW and TO weight were entered.
-Unpressurized Takeoff after Deice.
I've asked some line pilots and only one person had that happen and suggested it could be temperature related, but wasn't sure. -15c at the time. Could it have something to do with the Isolation Valve being closed?
Through about 3000AGL after reconfiguring the Bleed Panel, the Autothrottle armed and worked the remainder of the flight.
Thanks for your time.