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reference has been established.
Raw Data Monitoring Requirements
During localizer-based approaches; LOC, LOC-BC, LDA, SDF, and IGS,
applicable raw data must be monitored throughout the approach.
During non-localizer based approaches where the FMC is used for course or path
tracking (VOR, TACAN, NDB, RNAV, GPS etc.), monitoring raw data is
recommended, if available. Although continuous monitoring of raw data during
approaches is not required, ground based navigation aid(s) should be checked for
correct navigation no later than final approach.
October 31, 2006
777/787 Flight Crew Training Manual
Approach and Missed Approach
Copyright © The Boeing Company. See title page for details.
5.30 FCT 777/787 Preliminary (TM)
During single FMC, or single DME or single GPS operation, in the event the
single operational FMC, DME, or GPS fails during the FMC approach, there must
be a non-FMC means of navigation available for a missed approach such as
VOR/NDB raw data and/or radar, and there must be a non - FMC approach
available. Failure of the remaining single DME need not be considered if GPS
updating is being used.
Checking raw data for correct navigation before commencing the approach may
be accomplished by:
• pushing the POS switch on the EFIS control panel and comparing the
displayed raw data with the navaid symbols on the map. Example: The
VOR radials and raw DME data should overlay the VOR/DME stations
shown on the MAP and the GPS position symbol should nearly coincide
with the tip of the airplane symbol (FMC position)
• displaying the VOR and/or ADF pointers on the map display and using
them to verify your position relative to the map display.
Typical Navigation Display
The following diagram represents a typical navigation display with the POS
display selected.
MAP Displays and Raw Data
The map mode should be used to the maximum extent practicable. The map
display provides a plan view of the approach, including final approach and missed
approach routing. The map increases crew awareness of progress and position
during the approach.
JEFCO
AMBOY
Raw data
DME
Raw data
VOR radial
Raw data GPS position
VOR radial
Raw data
DME
R-220
R-120
October 31, 2006
777/787 Flight Crew Training Manual
Approach and Missed Approach
Copyright © The Boeing Company. See title page for details.
FCT 777/787 Preliminary (TM) 5.31
The map is particularly useful when the inbound course does not align with
runway centerline and allows the pilot to clearly determine the type of alignment
maneuver required. The map can be used to integrate weather radar returns, terrain
or traffic information within the approach path and airport area.
The preferred method for VOR or localizer tuning and final approach course
selection is procedure tuning. This can be confirmed by observing the displayed
frequency, identifier and course on the PFD or ND. The VOR automatically tunes
for a VOR approach after passing the first waypoint on the approach procedure.
Automatic procedure tuning also reduces crew workload in the terminal area by
automatically tuning the missed approach VOR if a different one is required and
aids the crew by reducing heads down time when last minute approach and/or
runway changes are required. If required, the appropriate frequency and course
may be preselected on the NAV RAD page for display at the appropriate time. For
localizer or localizer back course approaches, always use the front course.
Note: When appropriate, compare airplane position on the map with ILS, VOR,
DME, and ADF systems to detect possible map shift errors. Use of the POS
function selectable on the EFIS control panel is the recommended method
for making this comparison. The VOR and ADF pointers should be
displayed on the map.
RNAV Approaches
RNAV approaches may be flown provided the RNP being used is equal to or less
than the RNP specified for the approach and is consistent with the AFM
demonstrated RNP capability.
Approach Requirements Relating to RNP
With appropriate operational approval, approaches requiring RNP alerting may be
conducted in accordance with the following provisions:
• AFM indicates that the airplane has been demonstrated for selected RNP
• at least one GPS or one DME is operational
• any additional GPS or DME requirements specified by Operations
Specification or by the selected terminal area procedure must be satisfied
• when operating with the following RNP values, or smaller:
• no NAV UNABLE RNP alert is displayed during the approach.
　
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