Flight Controls Flashcards
Which hydraulic systems power the flight controls?
All three hydraulic systems provide power.
What is the rudder travel limiter?
The rudder travel limiter restricts rudder movement to prevent excessive tail loading at high speeds. It receives airspeed inputs from the Air Data Computers, and the Slat/Flap Electronic Control Unit. Rudder travel will be restricted from 33º to 4º based on flap position and speed.
What provides gust lock pretection on the ground?
Residual hydraulic pressure trapped by checkvalves in the PCUs.
Which control wheel is the autopilot roll servo connected to?
The FO’s.
Which control column is the autopilot pitch servo connected to?
The Captain’s.
What indications will be rpesent with a PCU runaway?
One of the two green roll select lights will be illumintaed.
When the aileron trim is in the normal range on the ground, what color will it be displayed in?
Green. It will turn white when moved out of the normal range.
What color will the aileron trim be displayed in during flight?
White, regardless of trim position.
Where do the yaw dampers receive data from?
YD 1 receives data from FCC 1, and YD 2 receives data from FCC 2.
What do the yaw dampers do?
They improve lateral stability and alleviate dutch roll.
When the PITCH DISC handle is pulled, will the autopilot be available? Why?
The autopilot may not be available because the autopilot servo for pitch control is located on the Captain’s side.
When the ROLL DISC handle has been pulled, what roll control surfaces will each yoke have control of?
The left yoke controls the left aileron, and the right yoke controls the right aileron. Each yoke controls the opposite side’s multifunction spoilers.
After the ROLL DISC handle is pulled, will the autopilot be available? Why?
The autopilot may not be available because the autopilot servo for roll control is located on the FO’s side.
How manh PCUs power the rudder?
Three.
If the rudder is jammed, how can control be regained?
Increasing the pressure on the rudder pedals will cause the bungee breakout system to be activated and control can be regained.