Most VDPs are between 1 and 2 NM from the runway. The following table provides more examples.
HAA (feet) 300 400 450 500 600 700
VDP Distance, NM 1.0 1.3 1.5 1.7 2.0 2.3
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.
Copyright . The Boeing Company. See title page for details.
5.60 FCT 737 (TM) October 31, 2006
Missed Approach - Non-ILS
Refer to Go-Around and Missed Approach - All Approaches, this chapter.
If a missed approach is needed atany time while circling, make an initial climbing turn toward the landing runway and intercept the missed approach course.
MCP altitude / MDA(H)
Select ALT HOLD
. (as needed)
Set missed approach altitude
.
Select HDG SEL .
Configuration at MDA(H)
Gear down
.
Gear up (1 engine)
.
Flaps 15
.
Flaps 10 (1 engine)
.
Arm speedbrake
.
Before turning base or initiating the turn to base
Gear down (1 engine)
.
Landing flaps
.
Do the Landing checklist
.
Intercepting landing profile
Disengage autopilot and
. autothrottle
Approach and Missed Approach 737 Flight Crew Training Manual
Circling Approach
Copyright . The Boeing Company. See title page for details.
5.62 FCT 737 (TM) October 31, 2006
Circling Approach - General
The circling approach should be flown with landing gear down, flaps 15, and at flaps 15 maneuvering speed. Use the weather minima associated with the anticipated circling speed. Maintain MCP altitude or MDA(H) using ALT HOLD mode and use HDG SEL for the maneuvering portion of the circling approach. If circling from an ILS approach, fly the ILS in VOR/LOC and VNAV or V/S modes.
Note: If the MDA(H) does not end in “00”, set the MCP altitude to the nearest 100 feet above the MDA(H) and circle at MCP altitude.
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.
Note: If VNAV ALT (as installed) is allowed to remain as the pitch mode during
the circling maneuver with a higher altitude, (e.g., missed approach
altitude), set in the MCP, the VNAV ALT pitch mode will revert to CWS P.
When in altitude hold at MCP altitude or MDA(H) and before commencing the circling maneuver, set the missed approach altitude.
Before turning base or when 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. Do 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 autothrottle. After intercepting the visual profile, cycle both F/D to OFF, then to ON. This eliminates unwanted commands for both pilots and allows F/D guidance in the event of a go-around. Complete the landing.
Note: If a go-around is selected with either flight director switch in the OFF
position, the flight director pitch or roll command bar on the corresponding
side will 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 airplane 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.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：737机组训练手册 Flight Crew Training Manual FCTM(81)
