Flight Controls Flashcards
When will the MFSsAuto retract on GRD
- Wheel speed < 45 kts
2. TLA moved beyond 35* after landing (G/A scenario)
What happens when Rudder Pedals are jammed
Rudder Control is maintained thru the YD and Turn Coordination (FCM Function)
What is the path between Rudder Pedals and Rudder Surface
Rudder Pedals > ACE with FCM inputs > PCU > Rudder Surface
How do the FLT Controls operate when the RAT is the only AC Power source
- HS Trim operates at LO speed
- S/F system operates at LO Speed
- S/F Position is limited to 3
What is the Path from Trim to Horizontal Stablizer
Trim Priority > ACE with FCM Input > DC Electric TrimMotor > HSA > Horizontal Stabilzer
Will the MFS function in Direct Mode
Yes, for Roll only and at a Default Fixed Gain
How are the FLT Controls Trimmed
Roll and Yaw = Surface repositioned to a new “Neutral Position”
The ________ is the Communication link between the FCM’s and the P-ACE’s
Controller Area Network Bus (CAN BUS)
How are the P-ACE’s connected to the FCM’s
FCM’s are connected to Controller Area Network Bus (CAN BUS) to provide inputs to 3 P-ACE’s
Where are FCM’s 1 & 2 located
MAU 1 in the FWD E-Bay
Pitch Trim Priority
- Backup Trim
- CA Trim
- FO Trim
- AP Trim
What are High Level Functions (FCM) for the Rudder
- Yaw Damp
- Turn Coordination
- Gain on Airspeed
Where are the S-ACE’s (Spoilers) located
Located in FCM #1, FCM #3, FCM #4 which have wiring to control the S-ACE’s
Will Speed Brakes/Spoilers work in Direct Mode
NO
What is Max Rudder deflection
30* either direction
When do Speed Brakes 3,4,5 Auto Retract in FLT
- S/F of 2 or >
- Airspeed < 180 kts
- TLA > 70*
How do you know if you have a FLT Control Problem
FLT Controls Synoptic Page (FLT Control will be Yellow)
When will the Spoilers 1-5 Auto Deploy
- WoW
- Wheel Speed > 45 kts or Airspeed > 60 kts
- TLA < 26*
What is Path from Control Wheel to Elevator
Control Wheel > ACE with FCM input > PCU > Elevator Surface
What is Path from Control Wheel to Aileron Surface
Control Wheel > PCU > Aileron Surface
What is Path from Control Wheel to S/F Surface
Slat/Flap lever > 2 SF-ACE > PDU > Flap Surface
What Actuator controls Pitch Trim
HS-ACE Communicates with 2 DC Electric Trim Motors (Active/Standby motors) that drive the Horizontal Stabilizer Actuator (HSA)
How long does the FBW Backup Battery last
15 minutes and is charged by DC ESS Bus 3
What are 3 Higher Level Functions for Pitch Control
- Gain on Airspeed
- Elevator Thrust Compensation
- AoA Limiting
What are some of the ways that the FLT Controls can go into Direct Mode
- Automatic detection of Channel Failure
2. Manually selected of FLT Controls Mode Panel Loss of Airspeed Data
What happens to System logic when you go into Direct Mode
FCM’s are removed from the Control Loop
Where is FCM 3 & 4 located
MAU 3 in Mid E-Bay
There are how many SF-ACE’s
2 SF-ACE’s located in Mid E-Bay (1 for Slats, 1 for Flaps)
How many P-ACE’s are there
3 Primary Actuator Control Electronics (2 FWD E-Bay, 1 AFT E-Bay) and controls Elevators and Rudders. Each has 2 Channels (Active and Standby)
What are Secondary FLT Controls
- Horizontal Stabilizer
- Flaps and Slats
- Multi Function Spoilers (MFS)
- GRD Spoilers
What happens when you Pull the Elevator Disconnect Handle
Isolates CA and FO Control Columns for Elevator Control
What does Pressing one of the 3 FLT Control Mode Panel Buttons do
Brings the Respective FLT Control into Direct Mode
How many ACE’s and FCM’s are there
9 ACE’s
4 FCM’s
