曝光台 注意防骗
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provides more examples.
Note: If flying a VNAV path approach and the airplane remains on the published
path, then the VDP is automatically complied with when the airplane
arrives at the DA(H) or MDA(H). It is not necessary to determine the point
to begin the visual descent for VNAV path approaches for this reason.
When flying an instrument approach using V/S, if the pilot adjusts the altitude
range arc to approximately the VDP distance in front of the runway by varying the
vertical speed, the airplane will remain close to or on the proper path for typical
non-ILS approaches.
Missed Approach - Non-ILS
Refer to Go-Around and Missed Approach - All Approaches, this chapter.
HAA (feet) 300 400 450 500 600 700
VDP Distance, NM 1.0 1.3 1.5 1.7 2.0 2.3
FAF
MDA(H)
550 ft
Touchdown zone
elevation (100 ft)
VDP (1.5 NM)
HAA (450 ft)
VDP
October 31, 2004
767 Flight Crew Training Manual
Approach and Missed Approach
Copyright © The Boeing Company. See title page for details.
FCT 767 (TM) 5.51
Circling Approach
Configuration at MDA(H)
• Gear down
• Flaps 20
(landing flaps optional)
• Arm speedbrake
Missed approach
• Make a climbing turn in the
shortest direction toward the
landing runway
• Do the missed approach
Turning base
• Landing flaps
(if not previously selected)
• Do the Landing checklist
Intercepting landing profile
• Disconnect autopilot and
autothrottle
Minimum descent altitude
• Select ALT HLD
(as needed)
• Set missed approach altitude
• Select HDG SEL
October 31, 2004
767 Flight Crew Training Manual
Approach and Missed Approach
Copyright © The Boeing Company. See title page for details.
5.52 FCT 767 (TM)
Circling Approach - General
The circling approach should be flown with landing gear down, flaps 20, and at
flaps 20 maneuvering speed. Use the weather minima associated with the
anticipated circling speed. As an option the approach may be flown with flaps 25
or 30. Maintain MDA(H) using ALT HOLD mode and use HDG SEL or HDG
HOLD for the maneuvering portion of the circling approach. If circling from an
ILS approach, fly the ILS in LOC and VNAV or V/S modes.
Note: If the MDA(H) does not end in “00”, select ALT HOLD when the airplane
reaches MDA(H).
Use of the APP mode for descent to a circling approach is not recommended for
several reasons:
• the AFDS does not level off at MCP altitude
• exiting the APP mode requires initiating a go-around or disconnecting the
autopilot and turning off the flight directors.
When in altitude hold at MDA(H) and prior to commencing the circling maneuver,
set the missed approach altitude.
Initiating the turn to base leg, select landing flaps and begin decelerating to the
approach speed plus wind correction. To avoid overshooting final approach
course, adjust the turn to final to initially aim at the inside edge of the runway
threshold. Timely speed reduction also reduces turning radius to the runway.
Complete the Landing checklist. Do not descend below MDA(H) until
intercepting the visual profile to the landing runway.
Leaving MDA(H), disengage the autopilot and disconnect the autothrottle. After
intercepting the visual profile, cycle both F/D to OFF, and select the PM F/D to
ON. This eliminates unwanted commands for the PF and allows continued F/D
guidance for the PM in the event of a go-around when pitch or roll mode is
changed. Complete the landing.
Note: If a go-around is selected with F/D switches off, the F/D commands
disappear when the first pitch or roll mode is selected or engaged.
Obstruction Clearance
Obstruction clearance areas during the circling approach are depicted in the
following figure. Distances are determined by aircraft approach category. Adjust
airplane heading and timing so that the airplane ground track does not exceed the
obstruction clearance distance from the runway at any time during the circling
approach.
October 31, 2004
767 Flight Crew Training Manual
Approach and Missed Approach
Copyright © The Boeing Company. See title page for details.
FCT 767 (TM) 5.53
Circling Approach - One Engine Inoperative
If a circling approach is anticipated, maintain gear down, flaps 20 and a minimum
of VREF 20 + wind correction while circling. Do not descend below MDA(H)
until intercepting the visual profile.
Under some flight conditions such as high temperatures, high pressure altitudes,
and high airplane weight, limit thrust may be required to maintain level flight with
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767机组训练手册Flight Crew Training Manual (FCTM)767(83)
