757 Flight Crew Training Manual 机组训练手册(66)

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If a missed approach is required following a manual instrument approach or visual approach, push either GA switch, call for flaps 20, ensure/set go-around thrust, and rotate smoothly toward 15° pitch attitude. Then follow flight director commands and retract the landing gear after a positive rate of climb is indicated on the altimeter.
During an automatic go-around initiated at 50 feet, approximately 30 feet of altitude is lost. If touchdown occurs after a go-around is initiated, the go-around continues. Observe that the autothrottles apply go-around thrust or manually apply go-around thrust as the airplane rotates to the go-around attitude.
Note: An automatic go-around cannot be initiated after touchdown or if the airplane is below 5 feet radio altitude for more than 2 seconds.
The GA pitch mode initially commands a go-around attitude and then transitions to speed as the rate of climb increases. This speed is normally between command speed and command speed + 25 knots. The GA roll mode maintains existing ground track. Above 400 feet AGL, select a roll mode as appropriate.

The minimum altitude for flap retraction during a normal takeoff is not normally applicable to a missed approach procedure. However, obstacles in the missed approach flight path must be taken into consideration. During training, use 1,000 feet AGL to initiate flap retraction, as during the takeoff procedure.
Note: Selection of pitch and roll modes below 400 feet AGL does not change the autopilot and flight director modes.
Note: When accomplishing a missed approach from a multi-autopilot approach,
initial selection of a roll mode, pitch mode, or when altitude capture occurs
above 400 feet AGL the autopilot reverts to single autopilot operation.
If initial maneuvering is required during the missed approach, accomplish the missed approach procedure through gear up before initiating the turn. Delay further flap retraction until initial maneuvering is complete and a safe altitude and appropriate speed are attained.
Command speed should not be increased until a safe altitude or flap retraction altitude is attained. Accelerate to flap retraction speed by repositioning the command speed to the maneuvering speed for the desired flap setting. Retract flaps on the normal flap/speed schedule. When the flaps are retracted and the airspeed approaches maneuvering speed, select FLCH and ensure CLB thrust is set. Verify the airplane levels off at selected altitude and proper speed is maintained.
If VNAV is used during go-around, the FMC missed approach profile should contain the appropriate holding speeds and altitudes. Speed intervention may be used to further modify airspeed as desired. If VNAV ALT (as installed) is displayed, a premature level off may occur and selection of FLCH may be required to complete the climb to the missed approach altitude.
If a diversion to an alternate airport is required, delay use of VNAV until appropriate FMC entries are completed.
Note: FMC speeds may not comply with speed/altitude restrictions when using VNAV at low altitudes.

Engine Failure During Missed Approach/Go-Around
If an engine fails during go-around, perform normal go-around procedures. Verify maximum go-around thrust is set. Maintain flaps 20, VREF 30 + wind correction (5 knots minimum) speed until initial maneuvering is complete and a safe altitude is reached. Accelerate to flap retraction speed by repositioning the command speed to the maneuvering speed for the desired flap setting. Retract flaps on the normal flap/speed schedule.

Missed Approach/Go-around - One Engine Inoperative
The missed approach with an engine inoperative should be accomplished in the same manner as a normal missed approach except use Flaps 5 for the go-around flap setting for a Flaps 20 approach or use Flaps 20 as the go-around flap setting for a Flaps 25 or 30 approach. After GA is engaged, the AFDS commands a speed that is normally between command speed and command speed + 15 knots. If accomplishing a manual go-around, the pilot must control yaw with rudder and trim. Some rudder pedal pressure may be required even with full rudder trim. Select maximum continuous thrust when flaps are retracted.
For a multi-autopilot go-around, yaw is initially controlled by the autopilots. Be prepared to immediately apply rudder input when selecting another roll mode, pitch mode, or when altitude capture occurs above 400 feet AGL because the autopilot reverts to single autopilot operation. The system reverts to normal autopilot operation and automatic control of rudder is discontinued.

Intentionally Blank
Copyright . The Boeing Company. See title page for details.
FCT 757 (TM) October 31, 2003

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1
Landing Configurations and Speeds . . . . . . . . . . . . . . . . . . . . . . . . . 6.1
Maneuver Margin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1Non-Normal Landing Configurations and Speeds . . . . . . . . . . . . . . . 6.1Non-Normal Landing Distance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1
　
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