FLIGHT CONTROLS Flashcards
Which statement is correct regarding fly-by-wire (FBW) direct mode?
A. Flight envelope protection is provided and all structural protections are lost.
B. Envelope protections are lost and structural protections are reduced.
C. High-lift envelope protections are lost.
D. Structural protections are reduced except for the primary flight controls.
B
What is the purpose of the power control units (PCUs)?
A. Combine signals from pilot control inputs with air data and inertial reference inputs
B. Electromechanically position the horizontal stabilizer (HSTAB)
C. Transmit commands from the primary flight control computers (PFCCs) to the HSTAB motor control electronic (MCE) unit
D. Hydraulically position the aileron, elevator, rudder, and spoiler flight surfaces
D
What is indicated by a red DUAL message on both primary flight displays (PFDs) and a “DUAL INPUT” aural alert?
A. Failure of both sidesticks
B. Completion of the sidestick test
C. Simultaneous operation of both sidesticks
D. No input detected from either sidestick
C
What is shown when two or more aileron surfaces fail?
A. Magenta aileron surface symbol on the FLT CTRL synoptic
B. Magenta triangle on the position indicator on the FLT CTRL synoptic
C. AILERON DEGRADED caution message on the EICAS D. AILERON FAIL caution message on the EICAS
D
Which flight control surfaces are involved in roll assist, speed brake control, and ground lift dumping?
A. Elevators a n d horizontal stabilizer (HSTAB)
B. Multifunction spoilers (MFSs)
C. Rudder
D. Slats and flaps
B
Which flight controls are not controlled by the fly-by-wire (FBW) system?
A. Ailerons
B. Slats and flaps
C. Horizontal stabilizer
D. Rudder
B
What is shown on the FLT CTRL synoptic if the status of an elevator is invalid?
A. Green triangle moving against a white scale to indicate its position
B. Amber elevator surface symbol and amber triangle on the position
indicator
C. Magenta elevator surface symbol and large magenta X on the
position indicator
D. L(R) ELEVATOR FAIL caution message
C
FBW1 & 2 are powered by
And back up power by
FBW 1 - DC1 - back up by PMG1
FBW 2 - DC2 - back up by PMG 2
What are important features of the fly-by-wire (FBW) system?
A) Replaces conventional cable flight controls with electronic interface that positions flight surfaces
B) Controls primary flight controls only, secondary flight controls conventionally controlled by cables
C) Provides flight envelope protection, but unable to provide airplane structural protection.
D) Flight control computers adjust maximum deflections of aileron, elevator, and rudder according to airspeed and airplane configuration.
A and D
What indicates that both sidesticks are being operated simultaneously?
A) “PRIORITY LEFT” aural warning is heard.
B) “DUAL INPUT” aural warning is heard.
C) Red DUAL message is shown on both primary flight displays (PFDs).
D) DIRECT flag is shown in red on both PFDs.
B and C
What occurs when the sidestick AP/PTY pushbutton is pressed and held to establish momentary sidestick priority?
A) Green PTY annunciation flashes in onside glareshield SIDESTICK guarded PBA.
B) Red arrow annunciation comes on in the opposite SIDESTICK guarded PBA.
C) A “PRIORITY LEFT” or PRIORITY RIGHT” aural message is heard three times.
D) If engaged, the autopilot remains engaged.
A and B
What occurs when latched sidestick priority is engaged?
A) Green PTY annunciation flashes in onside glareshield SIDESTICK guarded pushbutton annunciator (PBA).
B) Green PTY annunciation remains on (without flashing) in onside glareshield SIDESTICK guarded PBA.
C) Red arrow annunciation comes on in the opposite SIDESTICK guarded PBA.
D) A “PRIORITY LEFT” or PRIORITY RIGHT” aural message is heard once.
B, C and D
Which flight control surfaces are hydraulically positioned by power control units (PCUs)?
A) Horizontal stabilizer
B) Rudder
C) Ailerons
D) Spoilers
B, C and D
What is true regarding airplane roll control?
A) Bank angles of 30° or less require continuous sidestick deflection.
B) Bank angles greater than 30° require continuous sidestick deflection.
C) When sidestick released at a 45° bank angle, airplane maintains the bank angle.
D) When sidestick released at a 45° bank angle, airplane automatically recovers to a 30° bank angle.
B and D
In FBW normal mode, which indications occur when the airspeed is at or below V angle-of-attack (VAOA) SOFT?
A) Airspeed readout turns amber.
B) Stick shaker activates.
C) Single “SPEED” aural alert is heard.
D) Airplane pitch attitude is automatically reduced so that minimum speed is limited to VAOA HARD.
B and D
Which flight controls provide feedback to the fly-by-wire (FBW) system, but are not controlled by it?
Slats
Flaps
Ailerons
Elevators
Slats
Flaps
What is true of the positioning of the slats and flaps?
Select three responses.
A) Two power drive units (PDUs) electrically position the slats and flaps.
B) The PDUs receive commands from four slat/flap electronic control units (SFECUs).
C) During extension, the slats are positioned before the flaps.
D) During retraction, the slats are positioned before the flaps.
A, B and C
What happens when the ALTN FLAP pushbutton annunciator (PBA) on the TRIMS panel is pressed?
A) ALTN FLAP PBA latches in.
B) White SEL light in the PBA comes on.
C) ALTN FLAP SEL status message is shown on the EICAS.
D) Slats and flaps extend to position 3.
A, B and C
Under what condition is the ALTN FLAP guarded pushbutton annunciator (PBA) used?
A) When in fly-by-wire direct mode
B) When the SLAT/FLAP lever is jammed/inoperative
C) During a dual generator failure
D) Whenever only partial flap selection is desired
B
