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B757 Review Questions
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Flight Controls
• What would cause a spoiler light to illuminate on the overhead panel?
• One or more spoilers not in the commanded position.
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Flight Controls
• What two conditions are required for yaw damper operation?
• At least one IRU aligned, and left and center hydraulic pressure.
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Flight Controls
• With multiple autopilots engaged what happens if you trim with the electric trim on
the control column? Alternate trim switches?
• Control column nothing. Alternate switches would yield a UNSCHD STAB TRIM light.
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Flight Controls
• What would it mean if the STAB TRIM ligt illuminated?
• At least one of the two stabilizer brakes failed to release during trimming with the
electric switches. One brake fails, it trims at half the normal rate.
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Flight Controls
• Which hydraulic system powers the Rudder Ratio system?
• Left hydraulic system
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Flight Controls
• When using the alternate flap system to extend the flaps, will the flaps auto deploy
if a stall occurs with the leading edge devices in TO position?
• No.
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Flight Controls
• With the speed brakes not armed, what will cause them to auto deploy?
• Hydraulic pressure to both landing gear truck tilt actuators, both truck sensors detect
no tilt, both thrust levers idle, and either thrust reverser lever is raised to the
interlock stop.
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Flight Controls
• When do the slats move to their landing position?
• Whenever the flap lever is moved to the 25 or 30 position.
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Flight Controls
• Is there asymmetry protection when using the alternate flap system?
• Leading edge yes, trailing edge no.
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Flight Controls
• If the HDG is supplying electrical power, will the flaps and slats operate normally?
• No, hydraulic flow is mechanically reduced resulting in increased flap/slat operating
time.
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Flight Controls
• When do the slats move from the takeoff to landing position during normal flap
operation? Alternate flaps?
• Moving the flap lever to 25 degrees. Alternate flaps, 20 degrees.
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Flight Controls
• What does the STAB trim light mean?
• The stabilizer is moving at half the normal rate.
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Flight Controls
• Is there an altitude restriction if the yaw dampers are inoperative?
• No.
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Flight Controls
• How is the rudder powered?
• By 3 hydraulic actuators, left, center, right.
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Flight Controls
• How are the elevators powered?
• Three hydraulic actuators, left, center, right.
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Flight Controls
• How is the elevator feel powered normally?
• By the right and center hydraulic systems.
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Flight Controls
• How is the elevator feel powered with a loss of hydraulic power?
• It is spring powered
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Flight Controls
• What are the three modes of stab trim controls?
• Electric trim, alternate trim, and auto pilot trim.
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Flight Controls
• When is the control column electric trim switch inhibited?
• When 2 or more autopilots are engaged.
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Flight Controls
• Will the alternate trim disengage the autopilot?
• No. It overrides all autopilots but does not cause a disengagement.
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Flight Controls
• When the Alternate Slats are selected, the slats extend to the landing position when the Alternate Flaps selector is selected to
____degree position
• 20
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Flight Controls
• The slats remain in the takeoff position with flaps in _____degrees
• 1,5,15 and 20
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Flight Controls
• There are ____spoiler panels on each wing, but only ____ are used in flight to augment
the ailerons for airplane roll control
• 6,5.
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Flight Controls
• TRUE/FALSE: The 757 flight control has manual reversion as a backup to normal
hydraulic power.
• FALSE
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Flight Controls
• The Autoslats system causes the slats to automatically move from the_____position to the _____position when the stall warning
system activates.
• Takeoff, landing