Flight Controls Flashcards
What is the only primary flight control that is not FBW (Fly-By-Wire)?
- Ailerons
What is the difference between normal mode and direct mode?
- There are no higher level functions available in direct mode.
What are the higher level functions associated with pitch?
- Gain on Airspeed
- Elevator Thrust Compensation
- AOA Limiting/Stall Protection
What are the higher level functions associated with yaw?
- Yaw Damping
- Turn Coordination
- Thrust asymmetry
- Gain on airspeed - as airspeed increases, rudder deflection decreases.
What is the priority for the Trim System?
- Back-up
- Captain
- First Officer
- Autopilot
How is Roll controlled?
- Ailerons and multi-function spoilers (outer 3 spoilers on each wing)
How many Multi-function Spoilers are on each wing?
- There are 5 spoiler panels total.
- Only the outboard 3 on each side are considered multifunction spoilers.
What are the functions of the Multi-function Spoilers?
- 3 outboard spoilers are used for roll control, speed brakes and ground spoilers
- 2 inboard spoilers are only used for ground spoilers.
When will the Speed Brakes automatically close even if the lever shows deployed?
- Flaps = or > 2
- Airspeed < 180 kts
- TLA > 70 degrees
What is the flap/slat extension/retraction sequence?
- Slats extend first & retract last
Will loss of airspeed data cause the flight controls to revert to ‘DIRECT’ mode?
- YES
What happens to Artificial Feel if the Aileron(s) or Elevator(s) are disconnected?
- Aileron
- If the CA Side (left) is jammed…no Artificial Feel on the FO’s side
- Elevator
- Artificial feel is felt at 1/2 the normal load.
How are the Flight controls trimmed?
- Roll & Yaw:
- Ailerons and Rudder surface repositioned to a new ‘neutral position’
- Pitch:
- Horizontal Stabilizer
Will the Speed brakes / Ground spoilers function in ‘DIRECT’ mode?
- NO, but Roll Spoiler function is still available via default programmed values
What happens to the flight control system when the RAT is the only AC power
source?
- Horizontal stab trim operates at 1/2 speed
- Slat/flap system operates at 1/2 speed
- Slat / flap position is limited to ‘3’ to allow adequate airspeed for the RAT
What are the two main parts that make up the flight control electronics?
- The Primary Actuator Control Electronics (P-ACE)
- The Flight Control Module (FCM)
What do the Primary Control Electronics (P-ACE) control?
- The P-ACE units control the Rudder and the Elevator surfaces.
What is the purpose of the Flight Control Modules (FCMs)?
- The FCM(s) provide software-based assistance (digital) to the P-ACE and is
required for normal-mode operation of the Flight Controls System. They take
default analog signals and automatically provide digital augmentation for finer
control or higher level function (i.e. is the Pilot input do-able).
.How long does the Fly by Wire Backup Battery (Lead Acid) last?
- 15 Minutes
Describe what happens if the Roll Disconnect handle is pulled following an Aileron
Jam?
- Right Aileron Jam:
- The Captain retains control of the left aileron and the pair #5 of multi-function
spoilers will remain available with normal artificial feel. - Left Aileron Jam:
- The First Officer retains control of the right aileron without artificial feel and
roll trim since the feel mechanism is attached to Captain’s half of the system,
the pair #4 of multi-function spoilers will remain available.
What is Maximum Slat/Flap setting if RAT is Deployed?
- SLAT / FLAP 3
