United 737 Flight Controls Flashcards
At radio altitudes less than ____’ do not deploy speed brakes in flight
1000’
Full power control to the ailerons is provided by ____ hydraulic system
Either
If you have a total hydraulic power failure-rotation of the control wheels ____ position the ailerons
mechanically
If you have a jammed spoiler system, force applied to the ___ control wheel provides roll control from the ailerons
Captain’s
If you have a jammed aileron system, force applied to the _____ control wheel provides roll control from the spoilers
First Officer’s
If the autopilot is engaged, any ____ trim applied. can result in an out of trim condition and an abrupt ____ movement when the autopilot is disconnected.
aileron; rolling
When the control wheel is displaced more than approx ____ spoiler deflection is initiated and the flight spoilers rise on the wing with the up aileron and remain faired on the wing with the down aileron.
10 degrees
On the 737 _____ aileron trim switches reposition the aileron neutral control position.
Movement of both
Looking at the pitch control surfaces, these consist of ___powered elevators and an ___ powered stabilizer
hydraulic; electrically
If you have a control column jam, an override mechanism allows___
the control columns to be physically seperated
If the FEEL DIFF PRESS light illuminates, this indicates ___
excessive differential hydraulic pressure is sensed in the elevator feel computer
On the 737, engagement and disengagement of the Mach Trim System is accomplished _____
automatically as a function of airspeed
What has occured when the MACH TRIM FAIL light is illuminated only when the Master Caution Annunciator recall is activated?
a single channel failure of the mach trim system
The elevator feel shift module increases hydraulic system A pressure to the elevator feel and centering unit during a stall. This increases the ___ force to approximately double the normal feel pressure.
Forward control column
There are two modes on the main electric and autopilot stabilizer trim: high speed with flaps ___ and low speed with flaps ____
extended ; retracted
Actuating either pair of stabilizer trim switches____ if the autopilot is enaged
Automatically disengages the autopilot
With the stabilizer trim outside the takeoff trim range ___ if takeoff is attempted
An intermittent horn sounds
____ may be used to return the stabilizer to electrical trim units if manual trim is used to position the stabilizer beyond the electrical trim limits
The stabilizer trim switches
The stabilizer trim main electric cutout switch and the stabilizer trim autopilot cutout switch are provided to allow the autopilot or main electrical trim inputs to be ___
disconnected from the single stabilizer trim motor
When control column movement opposes the trim direction what will occur?
The control column actuated stabilizer trim cutout switches stop operation of the main electric and autopilot trim
Switching the STAB TRIM override switch to OVERRIDE____
electric trim can be used regardless of control column position
The speed trim system (STS) is a speed stability augmentation system designed to improve the flight characteristics during any operation with a low gross weight, aft center of gravity, and high thrust when the autopilot ____ engaged
IS NOT
____ operated the rudder system
Either Hydraulic System
B737 800 the yaw damper uses the ____
HYD SYS B or Standby hydraulic system pressure
Above approx 135 knots there is a reduction in both hydraulic system A and B pressure. This function limits FULL rudder authority ___
in flight after takeoff and before landing
Which hydraulic system powers the ground spoilers?
A
When the sppeed brake lever is actuated all of the spoilers will _____
extend on the ground and only the flight spoilers extend when the aircraft is in the air
If you use the flight spoilers during a turn ____
greatly increases the roll rate
All flight and ground spoilers will automatically rise to the full extension on landing if the speed brake lever is int he ARMED position and ____
both thrust levers are at IDle
An illuminated SPEED BRAKE Do not ARM light indicates____
An abnormal condition or during landing the wheel speed has dropped below 60 kts and the speed brake lever is not in the down position
The speedbrake lever _____ position in the 737 indicates all flight spoilers are extended to their maximum position for inflight use, while the ____ indicates all flight and ground spoilers are extended to their maximum positio for use on the ground.
FLIGHT DETENT
UP
In the event of a total hydraulic system B failure, the trailing edge flaps ____
Can be operated electrically
____ is provided through the electrical alternate flap drive system.
No asymmetry or skew protection
The Flaps/Slats Electronic Unit (FSEU) monitors trailing edge flaps for _____. If the FSEU detects a trailing edge problem, it ____ the trailing edge flap bypass valve preventing further travel.
asymmetry and skew conditions
closes
The TE flap load relief function protects the flaps from excessive air loads. When the flaps are set to 40 the trailing edge flaps will ____ if airspeed exceeds a predetermined limit.
retract to 30
The 737 leading edge devices are normally extended and retracted by ____
hydraulic power from system B
The 737 leading edge devices ____ be retracted by the standby hydraulic system
CANNOT
At Flaps 1, the Auto Slat system _____ as the aircraft approaches a stall condition.
Automatically drives the slats to FULL EXTEND
An amber illuminated Leading Edge Devices Transit ( LE FLAP TRANSIT) light, indicates _____
a LE slat skew condition exists
any LE device is in transit, or is not in its programmed position with respect to the trailing edge flaps
