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parameters is indicative of an unstabilized approach and requires the execution
of a missed approach. It is recognized that ATC instructions often necessitate
airspeeds higher than optimum during the initial portions of an instrument
approach. However, unstabilized approaches must not be continued below
1000’ above TDZE.
737 Sec. 3 Page 225
Flight Manual Continental Rev. 11/15/02 #41
Note: There are a few non-precision approaches where obstacle clearance
requirements have necessitated the coding of a gradient path in excess
of 3.5 degrees. It is possible that at high gross weights and highdensity
altitudes that the aircraft will exceed 1000 fpm below 1000’
above TDZE while otherwise meeting stabilized parameters. Under
the circumstances, the approach may be continued assuming comfort
of the crew and that the required PDI relationship is maintained.
APPROACH GUIDELINES
>>@ Radios should remain in AUTO as long as possible for enhancement
of the ANP value. Display and tune required raw data information no later than
on an intercept heading for the final approach course.
> The HSI vertical deviation scale serves as a PDI when the appropriate MCP
HSI switch is in NAV.
Refer to the Recommended Approach Setup table, in this section, for display
and mode configurations for the various aircraft types.
LOC, LDA, SDF
· These approaches are authorized for all B737 models.
· Display and tracking of the Localizer is required.
· Utilize VORLOC for tracking the localizer and VNAV for tracking the
gradient path.
· When using a NAV database ILS approach selection for a glideslope
inoperative approach, modify the FAF altitude, if necessary. Also, evaluate
gradient path compliance if a stepdown fix is indicated inside the FAF.
· There is no RNP manual entry requirement.
Sec. 3 Page 226 737
Rev. 11/15/02 #41 Continental Flight Manual
BC LOCALIZER
· These approaches are authorized for all B737 models.
· Utilize LNAV for course tracking and VNAV for tracking the Gradient
Path.
· The localizer raw data must be monitored and is controlling - freq. tuned,
front course set, Stby in B/CRS.
Note: There is no back course selection on the MCP, and the LOC BC
signal cannot be tracked by the autopilot or flight director. If
LNAV will not comply with raw data course requirements, revert
to HDG SEL.
· There is no RNP manual entry requirement.
· A Derived Decision Altitude (DDA) is created and set for minimums on
the barometric altimeter.
VOR
· These approaches are authorized for all 737 models.
· >>@ VOR raw data must be monitored and is controlling. There is
no RNP manual entry requirement for these models. VORLOC is used for
course tracking with the appropriate radio tuned and course set. VNAV is
used for tracking the Gradient Path.
· BC If raw data is not available manually enter an RNP of .5nm.
LNAV is used for course tracking. VNAV is used for tracking the
Gradient Path.
- If raw data is not available and monitored, display of the message
UNABLE REQD NAV PERF – RNP inside the FAF requires a go-around.
- Raw data, if available, should be monitored on the HSI display.
· A Derived Decision Altitude (DDA) is created and set for minimums on
the barometric altimeter.
737 Sec. 3 Page 227
Flight Manual Continental Rev. 11/15/02 #41
NDB
· BCD Flown without reference to raw data.
- Requires manual RNP entry of .5nm.
- Requires selection of the specific NDB approach from the FMC
database.
- Display of the message UNABLE REQD NAV PERF – RNP inside the FAF
requires a go-around.
· >>@ NDB raw data must be monitored and is controlling.
- No RNP manual entry requirement.
- PM must continuously monitor the NDB aural tone on final.
· Utilize LNAV for course tracking and VNAV for tracking the gradient
path.
· A Derived Decision Altitude (DDA) is created and set for minimums on
the barometric altimeter.
RNAV
· The > is prohibited from conducting RNP-based RNAV approaches due
to insufficient field-of-view alerting of an RNP exceedance.
· >@ Currently limited to RNP-based approaches at IAH for runway 8
and 26 only.
· Some RNAV approaches – titled RNAV (GPS) Rwy xx – may require
GPS updating. Be sure to read the briefing notes on the approach plate.
· These approaches must be selected from the FMC database.
· These approaches require a manual RNP entry of .3nm, or as specified on
　
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