.
where there is more than one GP angle, such as for ILS approaches, the
airplane uses the GP angle for the active leg to define the VNAV approach
path. These types of paths are shown on the LEGS page as having two GP
angle values, one approaching the FAF, the second approaching the
runway (missed approach point).
Note: The coded GP angle is steeper than normal in temperatures warmer than ISA standard and is shallower than normal in temperatures colder than ISA standard.
Copyright . The Boeing Company. See title page for details.
5.44 FCT 737 (TM) October 31, 2006
Approach and Missed Approach 737 Flight Crew Training Manual Instrument Approach Using VNAV
737-300 - 737-500
On RADAR vectors
HDG SEL
.
Pitch mode (as needed)
.
Enroute to fix
Flaps 1
.
LNAV or other roll mode
.
VNAV or other pitch mode
.
Descend to DA(H) or MDA(H)
Landing flaps (2 engine)
.
Monitor VNAV path
.
Do the Landing checklist.
Approximately 300 feet above MDA(H)
Set missed approach altitude .
At DA(H) or MDA(H)
Intercept landing profile . and disengage autopilot and autothrottle
Note: Requires FMC U7.1 or later
Approaching intercept heading
Flaps 5
.
Flaps 5
.
FAF
Intercept heading
. LNAV or other roll mode
Inbound (Approximately 2 NM)
Gear down
.
Flaps 15 (landing flaps 1 engine)
.
Arm speedbrake
.
Set DA(H) or MDA(H)
.
Select VNAV
.
Speed intervention (as installed)
.
On RADAR vectors
HDG SEL
.
Pitch mode (as needed)
.
Enroute to fix
LNAV or other roll mode
.
VNAV or other pitch mode
.
Descend to DA(H) or MDA(H)
Landing flaps (2 engine)
.
Monitor VNAV path
.
Do the Landing checklist
.
300 feet below missed approach altitude
Set missed approach altitude .
At DA(H) or MDA(H)
Intercept landing profile . and disengage autopilot and autothrottle
Approaching intercept heading
Flaps 5
.
Flaps 1
.
Flaps 5
.
FAF
Intercept heading
. LNAV or other roll mode
Inbound (Approximately 2 NM)
Gear down
.
Flaps 15 (landing flaps 1 engine)
.
Arm speedbrake
.
Set DA(H) or MDA(H)
.
Select VNAV
.
Speed intervention (as installed)
.
Approach and Missed Approach 737 Flight Crew Training Manual
737-600 - 737-900
Copyright . The Boeing Company. See title page for details.
5.46 FCT 737 (TM) October 31, 2006
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 2 NM before the first waypoint
of the approach, including approach transitions, or when below 2,000 feet
above the airport, whichever occurs first unless the pilot manually enters
an RNP or the navigation data base specifies the RNP value.
Enter the appropriate wind correction on the APPROACH REF page or use speed intervention, if available.
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 before 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 LVL CHG or V/S, or if in ALT HOLD at the FAF altitude, set DA(H)/MDA(H) in the MCP and engage VNAV when approximately 2 NM before the FAF. Speed intervention (as installed) may also be engaged, if desired. The airplane will descend on final approach in VNAV PTH.
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