and Answers 100% Pass
Pitch control is achieved by? - ✔✔two hydraulically powered elevators,
and a hydraulically powered stabilizer trim system.
How many actuators are there on each elevator? - ✔✔3 actuators on each
elevator
How many hydraulic systems must be operating to operate the Elevators? -
✔✔at least one hydraulic system is functional
Elevator feel force is supplied by which computers? - ✔✔two elevator feel
computers
Stabilizer trim operation depends on which hydraulic power? - ✔✔from
the left and center hydraulic systems.
How many control modules the stabilizer operations have? - ✔✔two
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, What are the three modes of the stabilizer trim control? - ✔✔electric,
automatic, and alternate.
What is Pitch Enhancement System (PES) - ✔✔PES provides limited
stabilizer trim control in the event of a failure of the left and center
hydraulic systems.
How does the Pitch Enhancement System consist of? - ✔✔A Power
Transfer Unit (motor / pump).
The power transfer unit uses which hydraulics? - ✔✔right hydraulic
system pressure and trapped left hydraulic system trim fluid to provide a
backup trim system
When will the PES operate? - ✔✔if both left and center hydraulic systems
fail in flight.
With the PES active, what's the rate of the trim stabilizer? - ✔✔¼ of the
normal trim rate
With the PES active, which stabilizer mode is available? - ✔✔Only the
electric mode
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