787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Instruments, Displays -
Controls and Indicators
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 10.10.17
The scale appears at the same time as the approach reference data if NPS are not
shown. If either LNAV or VNAV is engaged, or LNAV is armed, the NPS
indications remain in view until the final approach course capture.
Note: The deviation scales are proportional to RNP. They do not become more
sensitive as ILS/GLS scales do.
At low radio altitudes, with the autopilot or flight director engaged, the scale turns
amber and the pointer flashes to indicate excessive final approach course
deviation.
At low altitudes, with LNAV engaged and FAC armed, the lateral deviation scale
turns amber and the pointer flashes if the final approach course is not captured.
The pointer:
• indicates glidepath position relative to the airplane position
• unfilled white triangle if VNAV is engaged
• unfilled magenta triangle if VNAV is not engaged
• is in view when
• < 6,000 feet above field elevation
• < 25 NM from missed approach point
• airplane position is within 60º of FAC
• airplane track is within 90º of FAC
• filled magenta triangle when captured.
The scale appears at the same time as the approach reference data if NPS are
shown. If either LNAV or VNAV is engaged, or LNAV is armed, the NPS
indications remain in view until glidepath capture.
At low radio altitudes, with the autopilot or flight director engaged, the scale turns
amber and the pointer flashes to indicate excessive glidepath deviation.
4
Glidepath Pointer and Scale
February 15, 2010
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