Flight Controls Flashcards
How many PCUs aileron
2 CA left side, FO right side
What type of Flaps?
Double-slotted fowler flaps that move rearward and down
Which controls are fly by wire ?
Spoilerons
Gust lock for Ailerons?
Flutter damper if pressure lost to PCU in flight.
On the ground the flutter damper, PCU, and trapped pressure
What happens if an aileron PCU causes un-commanded roll with an aileron runaway?
Bungee breakout
Green PLT/CPLT ROLL light illuminates in front of the pilot that has control
What is the SECU
Spoiler Electronic Control Unit- use electronic inputs and information from airspeed to determine spoiler deflection
Rudder PCUs?
3 PCUs only one must work for trim to work
Yaw damper 1 and 2
Elevator
3 PCUs.
Each side is separate except for the connection CA left side, FO right side
Flutter dampers
Jams usually overpowered by the other 2 PCUs
Horizontal stabilizer
2 elect motors and a jack screw
When do Flaps operate at 1/2 speed
Failure of single PDU or one FECU channel
PDU-Power Drive Unit
How many spoilers on each wing
4-spoileron, flight spoiler, out board and in board ground spoiler
Takeoff Config Warning
Flaps Flight spoilers Autopilot Parking brake Aileron trim Rudder trim Horizontal stabilizer trim Checked by the proximity sensing units
How many PCUs?
6-elevator
3-rudder
2-each aileron
Half bank
Auto at 31,600 or when selected on
Flaps
2 power drive units (PDUs) that power the flex shaft, one motor fails flaps travel at half speed
