Interview Questions

[YHZ Pilot]

What are active controls. I've searched and can't find the answer.

How are the flaps powered on the 747-400?

What is the pressure differential on the 747-400?


Thanks

YHZ Pilot.

[sinkingship]

Leading Edge Kruger and Variable Camber are Pnumatic and Trailing edge Hydraulic form Systems 1&4

Cabin Pressurization
Maximum differential pressure (relief valves) 9.4 PSI
Maximum allowable cabin pressure differential for take-off and landing 0.11 PSI