Flight Controls Flashcards
Fly-By-Wire technology electronically controls which of the following?
Flaps/slats,
Horizontal stabilizer,
elevators,
rudder,
and multifunction spoilers
- NOT aileron - -
Secondary flight controls, elevators, rudder, and multi-function spoilers are
controlled by _______.
Fly-By-Wire technology
Which of the following answers is the most inclusive of Fly-By-Wire components.
“4 types of Aces” & 4 FCM’s
3 Spoiler ACE (S-ACE) units (multifunction and ground types split up between the 10 panels)
3 Primary ACE (P-ACE) units (elevators and rudder - 2 actuators per ACE)
2 Slat/Flap ACE (SF-ACE) units (each ACE has a slat channel and a flap channel)
(1) Horizontal Stabilizer ACE (HS-ACE) unit (2 channels, one surface on one ACE)
- NO AILERON ACE - - -
- NO BU (BACKUP ACE) - - -
True or False: The Ailerons are fly-by-wire.
False
True or False: Wheel speed signals are provided to the spoiler ACE for ground
spoiler deployment.
True
This system provides the aircraft attitude and acceleration information to FCMs used for AOA limiting function calculations.
Inertial Reference System
This system provides TLA to the FCMs used for elevator thrust compensation.
FADECS
[TLA - Thrust Lever Angle]
This system provides wheel speed signals used for ground spoiler deployment.
Brake Control Modules (BCMs)
This system provides autopilot commands to the fly-by-wire system for aircraft control.
Automatic Flight Control System (AFCS)
Which two modes of operation does the flight control system have?
Normal mode / Direct mode
True or False: In Direct mode, the FCM provides software-based airspeed gain schedules and control limits to the P-ACE units.
False [only basic values from the P-ACE, no FCM input]
True or False: In Normal mode, the FCM provides software-based airspeed gain schedules and control limits to the P-ACE units.
True
The following high-level functions are available in normal mode EXCEPT _______.
–NOT AUTOTHROTTLES–
Airspeed gain scheduling,
Elevator thrust compensation,
AOA limiting,
Yaw Damper,
turn coordination,
True or False: For the rudder, elevator, and stabilizer control surfaces, the flight control system has a function called “Odd-Even Day Engage” configuration to select which set of channels and hydraulic system is active on a particular day.
True
If a jam occurs in the aileron control system, what can be done?
The two halves of the aileron control system can be disconnected by using the AILERON DISCONNECT handle in the flightdeck
The ROLL scale displays aileron trim indications on the _______.
EICAS
If a hydraulic system that powers an active elevator PCU loses pressure, which of the following occurs?
The standby PCU becomes active
Yaw control of the aircraft is provided by the rudder. It is hydraulically powered by _______ PCUs and receives signals from the aircraft’s FBW system.
2
The PCUs operate in an _______ / _______ mode with the active PCU alternating
every time the system is powered up.
active/standby
True or False: If the rudder is in Direct Mode, the amount of rudder deflections is based on flap/slat settings.
True
If the rudder is in Direct Mode and the slats/flaps are retracted, the rudder is
allowed _______.
Minimum deflection
(high speed mode with slats and flaps up)
The yaw scale displays rudder trim on the _______.
EICAS
The aircraft is equipped with a total of _______ leading edge slats and _______
double-slotted trailing edge flaps.
8, 4
True or False: During extension, the slats move to the selected position followed by the flaps; this sequence is reversed during retraction.
True
Slat and flap position is displayed on the _______.
EICAS
True or False: If the “FLAP FAIL” message appears in flight, the slats will still operate.
True
If the RAT is the only power source available, only one SLAT/FLAP channel will be powered and the slats and flaps will operate at _______ speed.
half (slower)
The spoiler control system consists of a total of _______ spoiler panels.
10
The multi-function spoilers have the following functions.
Roll control,
speed brakes,
ground spoilers
True or False: Hydraulic pressure powers the spoiler system.
True
Ground spoiler extension occurs when which of the following conditions are met?
The WOW signals indicate on ground,
&
the wheel speed is above 45 knots or airspeed is above 60 knots,
&
TLA is below 26 degrees
After rollout, spoilers will automatically retract when the wheel speed is below
_______ kts. for at least _______ seconds.
45 kts, 5 sec.
[or TLA >24 degrees]
If in ground spoiler mode, the spoilers will automatically retract if the thrust levers are moved beyond a TLA of _______ degrees.
35 degrees
(8.33)
The aircraft is equipped with how many P-ACE unit(s)?
3
(P-ACE - Primary Actuator Control Electronics) [2 in the forward E-Bay, 1 in the aft E-Bay]
True or False: The flight control modes available on the aircraft include Alternate and Direct.
False [Normal, Direct]
True or False: The roll control system includes multi-function spoilers to assist the Ailerons.
True
True or False: When the elevator control system is in Direct mode, the autopilot is unavailable.
True
[as well as airspeed gain scheduling and AOA limitations]
When using the YAW selector knob, trim commands are limited to _______ seconds.
3 sec.
True or False: During slat and flap extension, the flaps move to the selected
position followed by the slats.
False
True or False: If the spoiler system is in Direct mode, ground spoilers are not
available.
True
Which flight controls do NOT disconnect in the event of a control jam?
–NOT RUDDER–
Aileron and elevator disconnect
Which of the following trimmable surfaces has an aural warning if it is engaged longer than 3 seconds?
Elevator / Pitch trim
