Flashcards in Flight Controls Deck (24):
Which yoke is connected to the right aileron? The left aileron?
First officers/ captains
How are the ailerons, elevators, and rudder actuated?
Yoke and pedals operate a system of cables and pulleys that connect to pull and push rods at the flight control which operate a hydraulic PCU that hydraulically actuates the control surface
Which yoke controls the right elevator? The left?
First officers/ captains
What is the purpose of the multi function spoilers?
To assist with roll control and serve as a spoiler in flight and upon landing
Are the multi function spoilers operable at any speed?
How are the MFSs controlled when used for roll assistance?
The F/Os yoke position sends an electrical signal to the left MFS panels which are hydraulically operated by the PCUs. The captains yoke sends an electric signal to the right MFS panels which are hydraulically operated by the PCUs
What is the flight deck indication of a jammed aileron cable?
Both yokes will be jammed
What happens after the roll disconnect handle is pulled?
The aileron cable and pulley systems are disconnected through torque tubes. 20 seconds later if the operable side hasn't been selected, the amber ROL SEL switchlight illuminates
How is the operable side selected for a roll disconnect?
By pushing the roll SEL switchlight on the I jammed side
What does pushing the roll select switchlight do?
Allows the pilot with the operable aileron to control the onside MFS panels
What is the flight deck indication of a PCU runaway?
Aircraft begins an uncommanded roll and the PLT switchlight on the side without the PCU runaway illuminates automatically because of the bungee breakout signal
What is occurring when the pilot trim the ailerons or the rudder?
The control surface is being repositioned. There are no trim tabs
What panels are part of the ground lift dumping system?
Inboard and outboard spoilers, all 4 MFS panels
How are the flight controls gust locked?
Hydraulic fluid is trapped in the PCUs during shutdown
His is the yaw damper engaged?
YD 1 and YD 2 engage push buttons 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
Is it necessary to disconnect the yaw damper during landing?
How are the flaps operated?
How many flap segments does the CRJ have?
4 total, 2 on each wing
Is there any asymmetrical protection within the flaps?
Yes, if the flap segments differ by more than 5 degrees then the brakes are applied and the flaps will remain at the current position
How is the STAB TRIM operated?
Electrically, a split switch on the yoke operates two motors and a jackscrew to change the horizontal stabilizer angle of incidence
What systems can operate the stab trim?
CAs trim switches, FOs trim switches, autopilot and Mach trim