曝光台 注意防骗
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At DA(H) or MDA(H)
• Intercept landing profile
and disengage autopilot and
disconnect autothrottle
Descend to DA(H) or MDA(H)
• Monitor VNAV path
• Do the Landing checklist
300 feet Below Missed
Approach Altitude
• Set missed approach
altitude
October 31, 2004
767 Flight Crew Training Manual
Approach and Missed Approach
Copyright © The Boeing Company. See title page for details.
5.42 FCT 767 (TM)
Approach Preparations for using VNAV
Select the approach procedure from the ARRIVALS page of the FMC. Tune and
identify appropriate navaids. Do not manually build the approach or add
waypoints to the procedure. If additional waypoint references are desired, use the
FIX page. To enable proper LNAV waypoint sequencing, select a straight-in
intercept course to the FAF when being radar vectored to final approach.
Verify/enter the appropriate RNP and set the DA(H) or MDA(H) using the baro
minimums selector. If required to use MDA(H) for the approach minimum
altitude, the barometric minimums selector should be set at MDA + 50 feet to
ensure that if a missed approach is initiated, descent below the MDA(H) does not
occur during the missed approach.
Note: The approach RNP is not displayed until the first waypoint of the approach
is sequenced unless the pilot manually enters an RNP or the navigation
data base specifies the RNP value.
Transition to an Instrument Approach using VNAV
There are several techniques which help ensure a smooth descent transition to a
non-ILS final approach where VNAV PTH will be used.
Note: The FAF is normally the waypoint shown on the LEGS page and map
display just prior to the final approach segment. The following discussions
assume the FAF altitude constraint is set in the MCP while descending
toward the FAF.
If descending to FAF altitude in FLCH or V/S, or if in ALT HOLD at the FAF
altitude, set DA(H)/MDA(H) in the MCP, engage VNAV and speed intervention
when approximately 2 NM prior to the FAF. The airplane will descend on final
approach in VNAV PTH.
If descending in VNAV PTH prior to final approach and the situation permits a
continuous descent through final approach, remain in VNAV PTH while
configuring the airplane for approach and landing. The airplane will slow
automatically to the FAF speed constraint. Reset the MCP to DA(H)/MDA(H)
approximately 2 NM prior to the FAF (waypoint just prior to the final approach
segment) to prevent level off, and select speed intervention.
If descending in VNAV SPD, the AFDS will change to VNAV PTH automatically
when approaching the FAF if the airplane is on or below the path. Reset the MCP
to the DA(H)/MDA(H) approximately 2 NM prior to the FAF and select speed
intervention. VNAV disengages and ALT HOLD mode engages if the airplane
levels off at the MCP altitude. If the AFDS enters ALT HOLD mode, set
DA(H)/MDA(H), select VNAV and speed intervention. Execute a missed
approach if the deviation above path becomes excessive enough to prevent
achieving a stabilized 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) 5.43
Final Approach using VNAV
Approaching intercept heading, select flaps 5 and ensure LNAV or other
appropriate roll mode is armed or engaged. Approaching the FAF (approximately
2 NM), select gear down and flaps 20 and adjust speed. Set the DA(H) or MDA(H)
in the MCP altitude window, select VNAV, and ensure VNAV PTH and
appropriate roll mode is annunciated. Use VNAV speed intervention to control
speed.
Note: If desired altitude is not at an even 100 foot increment, set the MCP altitude
to the nearest 100 ft. increment below the altitude constraint or MDA(H).
Just prior to FAF, select landing flaps, reduce to final approach speed and
complete the Landing checklist. If the charted FAF is too close to the runway to
permit a stabilized approach, consider establishing final approach pitch mode and
configuring for approach and landing earlier than specified in the Operations
Manual procedure.
With the MCP altitude set to DA(H) or MDA(H) and the airplane stabilized on the
final approach path, the map altitude range arc assists in determining the visual
descent point (VDP). As soon as the airplane is at least 300 feet below the missed
approach altitude and stabilized on final approach in VNAV PTH, set the MCP
altitude to the missed approach altitude. VNAV path deviation indications on the
map display assist in monitoring the vertical profile. The autopilot tracks the path
in VNAV PTH resulting in arrival at, or near, the visual descent point by the
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767机组训练手册Flight Crew Training Manual (FCTM)767(79)
