787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Instruments, Displays -
Head-Up Display System -
Displays
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 10.12.9
• displayed on vertical deviation scale only in descent phase of flight
• flashes for ten seconds if pointer migrates into bar area for five seconds or
ANP bars meet in the middle of the deviation scale
Lateral and Vertical scales:
• outer tic marks represent RNP. Center tic mark represents airplane position
• bars represent ANP
• area between bars indicate margin available to remain within RNP criteria
• bars on vertical scale display only during FMC descent phase of flight
If ANP equals or exceeds RNP:
• solid bars meet in the middle
• after five seconds, bars become hollow (unfilled) and bars and indices
blink for three seconds indicating RNP operations can no longer be
maintained
• pointer blinks for ten seconds, then steady
• NAV UNABLE RNP EICAS message is displayed
If pointer migrates into bar area for five seconds:
• bars become hollow (unfilled) and blink for 3 seconds, then steady
• indices blink for 3 seconds, then steady
• pointer blinks for 10 seconds, then steady
• bars remain hollow (unfilled) as long as alert is active
4
Deviation Scale
February 15, 2010
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