Flight Controls Flashcards
Pertaining to the ailerons, when disconnected by the roll disconnect mechanism, who controls what?
Pilot controls the roll spoilers. The Co-pilot controls both ailerons
A roll damper is mounted on which side of the control column?
The pilot side
What controls the extension/retraction of the multifunction spoilers?
A spoiler electronic control unit (SECU 1 and SECU 2). A single power control unit is used on each spoiler.
The vertical stabilizer is powered hydraulically by …
Two hydraulic power control units (PCU’s)
What supplies a simulated pedal load to the fight crew?
Rudder-control feel unit
Where do the cables for the rudder separate to minimize the possibility of being severed?
Engine rotor burst zone
What provides gust lock damping for the rudder when on the ground?
Trapped hydraulic fluid
The PCU’s
On the rudder, which PCU controls what?
Left hydraulic controls the upper PCU
Right hydraulic controls the lower PCU
Is there a backup to the PCU’s if one should fail?
The auxiliary hydraulic system powers the lower PCU should the right hydraulic system lose pressure
The rudder travel limiter actuator limits movement of the rudder control surface as a function of …
Airspeed
During takeoff the yaw damping function is disabled when?
Above 60 knots until weight is off the wheels
What powers the elevators?
Two PCU’s hydraulically power each of the two elevators. Four total.
The aileron trim tab (one only) is located where?
Left aileron
What moves the horizontal stabilizer?
Two electric trim motors drive a jack screw the positions the stabilizer
What prevents trim runaway?
Each of the two trim motors has a brake
The horizontal trim control unit receives inputs from where? (4)
- Control wheel trim switches
- Autopilot
- Flaps
- Air data computers
With the switch in PRI, trim rate is a function of …
Airspeed
With the switch in SEC, trim rate is …
A constant .2 degrees per second
Which way does the aircraft automatically compensate when the flaps or spoilers are extended?
With flap extension, the aircraft has a nose-down pitching moment
With spoiler extension, the aircraft has a nose-up pitching moment
Mach trim uses information from _____ to command movement of the horizontal stabilizer?
Air data computers
The _____ hydraulic system normally operates the flaps?
Right
The left hydraulic system can operate the flaps when?
ALTN FLAPS button on hydraulic panel is pressed
With ALTN FLAP selected or if the right DC motor-driven pump supplies hydraulic pressure for flap movement, what occurs?
Flap movement extends up to 60-70 seconds while lowering flaps from 0 to 20 in flight
Each panel of the spoiler system is actuated by …
A single PCU
