B757 Review Questions

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• At what RA does flare mode engage?

• 45 feet RA

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• When does autopilot electrical isolation occur?

• With at least two generators working and three autopilots armed for the approach.

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• After electrical isolation, what is the power source for the center autopilot?

• Battery/Standby system

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• If an engine generator were to fail on a multi autopilot approach above 200’, what would happen to the AC power distribution

to the auto pilots?

• After the generator failure the center autopilot switches from center AC bus to its

normal source of power, Left AC bus.

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• If during a land three approach an AP were to fail, could the approach be continued to

an auto land safely?

• Yes. A single fault would not prevent the remaining two autopilots from completing

the auto landing.

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• Rudder control is added by the AP when?

• Only during multiple AP approaches.

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• When is GA mode armed?

• When the flaps are not up or GS is captured

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• Can the AP disconnect bar disconnect all 3 AP?

• Yes, but will not silence the horn

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• Is over/under speed protection available in VS mode?

• No

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• What percentage is scheduled on the TMC for CLIMB 1, and CLIMB 2?

• 94% and 88%

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• What is the scheduled pitch attitude after takeoff at 400’

• V2 + 15

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• During a coupled missed approach, an engine fails just as the GA switch is activated. Which action

must the pilot take to prevent yaw from rolling the aircraft?

• None. There is rudder input from the auto flight system preventing a yaw from rolling the aircraft. However, once a pitch or roll command is initiated

by the pilot, he must now manually deflect the rudder.

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• When is the GA mode armed?

• When the flaps are not up, or GS is captured.

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• Do the autopilots do anything different to the stab trim during a LAND 2 approach?

• Yes. At 330 feet RA and increment of nose up trim is automatically applied.

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• Can you dispatch with both Yaw Dampers inoperative?

• No, check MEL

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• When does rudder channeling commence on a multi channel approach?

• Below 1500’ RA

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• When is the normal bus-tie operation isolated/inhibited on a multi channel

approach?

• 200’ RA

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• What does the autopilot amber annunciator light indicate?

• Indicates that some operating mode of the engaged autopilot has failed, but the auto

pilot remains engaged.

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• Is over speed protection available in Flight level change mode?

• Yes.

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• What is the main power source of the left and center FCC’s?

• Left main AC bus and Center AC bus.

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• True or false: the autopilot trims nose up at 330’ on CAT III land II approach?

• True.

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• Is manual rudder input restricted during auto land operation?

• Yes, manual rudder input is restricted due to A/P rudder control from 1500 feet

through GA.

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• What is a good way to monitor the center FCC in flight?

• Use the center Autopilot

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• TRUE/FALSE: During an Autoland Roll Out mode operation the Autopilots lower

the nose wheel to the runway at 5 feet R/A plus 2 seconds with the pitch attitude less

than 2 degrees

• TRUE

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• Should you follow the flight director pitch bar at lift off?

• No, you would probably get a tail strike

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• What will the A/T system do when the thrust reversers are selected after landing?

• A/T mode disengages

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• Before the autoflight system will climb using FLCH,________ and then the desired

AFDS pitch change is made

• A higher altitude has to be set in the Altitude window

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• During the takeoff roll, EPR appears in both the FMA A/T windows until what speed?

• 80 knots

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• All AFDS modes can be disengaged by selecting another command mode or by disengaging the A/P and_____

• turning off the Flight Directors

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• During the takeoff roll, the F/D pitch bar commands a fixed attitude of

• 8 degrees nose up

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• Can the A/T be operated independently of the flight director and the autopilot?

• Yes

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• After liftoff, the F/D pitch bar initially moves to an attitude of

• 15 degrees nose up

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• TRUE/FALSE: The vertical speed mode will command the aircraft to leave the

current altitude when a new altitude mode has not been selected.

• TRUE

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• When GA is engaged, the AFDS controls pitch and roll while the A/T

• Increases thrust to establish a 2,000 fpm climb

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• TRUE/FALSE: During the autoland rollout mode operation, rollout guidance continues to full stop or until the A/Ps are disengaged.

• TRUE

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• TRUE/FALSE: During the autoland rollout mode operation the F/D roll command bar provides directional steering information.

• TRUE

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• Active FMA modes are displayed in large green letters in the top part of the

annunciator windows. Armed FMA modes are indicated _______underneath the green

annunciations.

• In smaller, white letters

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• How many FCCs are normally used for A/P operations during an automatic approach, landing and rollout, as well as the initial

phase of a go-around?

• Three

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• TRUE/FALSE: The V/S mode has no stall or overspeed protection and annunciations

• TRUE

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• When the LOC is captured, the AFDS will command up to _____ degrees regardless of

the MCP bank angle selector.

• 30