Flight Controls Flashcards
Which yoke is connected to the right aileron
First officer’s
Which yoke is connected to the left aileron
Captain’s
How are the ailerons, elevators and rudder actuated
They are controlled by a network of cables, pulleys, push/pull rods, and levers that transmit control inputs to the respective hydraulic power control units (PCUs)
Which yoke controls the right elevator and right aileron?
First officer’s
Which yoke controls the left elevator and left aileron?
Captain’s
What is the purpose of the Multifunction Spoilers (MFS)
Assist with roll control (Spoilerons)
Act as spoilers in flight
Assist with ground lift dumping after landing
Are the Multifunction spoilers operational at any speed
Yes
How are the (Multifunction Spoilers) MFSs controlled when used for roll assistance
The FO’s yoke position sends an electrical signal to the left MFS panels which are hydraulically operated by PCUs.
The CA’s yoke position sends an electrical signal to the right MFS panels which are hydraulically operated by PCUs.
What is the flight deck indication of a jammed aileron cable
Both yokes will be jammed
What happens after the ROLL DISC handle is pulled
The aileron cable and pulley systems are disconnected through torque tubes.
20 seconds later, if the operable side has not been selected, the amber ROL SEL switch light illuminates
How is the operable side selected
By pushing the ROL SEL/PLT ROL switch light on the unjammed side
What does pushing the ROL SEL/PLT ROL switch light accomplish
Allows the pilot with the operable aileron to control the on-side MFS panels
What protection is provided for an aileron PCU runways?
When the pilot flying applies 9lbs of force in the direction opposite the runaway, the bungee breakout system will separate the control wheels and the spoiler stabilizer control unit (SSCU) associated with the aileron that has not runaway will illuminate either the PLT ROLL or CPLT ROLL switch light, display the appropriate ROLL CMD advisory message, and automatically command both sets of the MFSs to respond to inputs from the control wheel connected to the operable aileron.
What is occurring when the pilots trim the ailerons or rudder?
The control surface is being repositioned.
There are no trim tabs
What panels are part of the GND LIFT dumping system
Inboard and outboard ground spoilers, all 4 MFS (multi function spoilers) panels
How are the flight controls gust locked
Hydraulic fluid is trapped in the PCUs and flutter dampers during shutdown
How is the Yaw Damper engaged
YD1 and YD2 engage switch lights on the center pedestal
How is the Yaw Damper disengaged
DISC button on the center pedestal
What controls the yaw damper
The flight control computer 1 (FCC1) controls Yaw Damper 1 (YD1)
The flight control computer 2 (FCC2) controls Yaw Damper 2 (YD2)
Is it necessary to disconnect the Yaw Damper on landing
No
How are the flaps operated
2 electric power drive units (PDUs) mounted on the flap gearbox.
How many flap segments does the CRJ have
4 total, 2 on each wing
What protection is provided to prevent flap asymmetry?
If the flap segments different by more than 5°, the flap brakes are applied and the flaps will remain at the current position.
The Flap Electronic Control Unit (FECU) will prevent the flaps from being reset during flight.
How is STAB TRIM operated
Electrically. A split switch on the control yoke operates two motors and a jack screw changing the horizontal stabilizer angle of incidence
What systems can operate the STAB TRIM
CA’s trim switches,
FO’s trim switches,
autopilot and
MACH trim
What is the priority for STAB TRIM control
CA
FO
Autopilot
MACH trim
What degree of Slat/Flap deployment will the emergency flap switch command?
25°/20°
Emergency flap switch inhibit speed?
220 KIAS
Min/Max angles of incidence for the horizontal stabilizer
+2° / -13°
