787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Management, Navigation -
FMC Preflight
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 11.40.9
Valid entries are ICAO four letter airport identifiers.
Removes previous GATE entry.
Entry blanks at lift–off.
The gate entry allows further refinement of the latitude/longitude position.
Optional entry after reference airport entered.
Valid entry is a gate number at the reference airport.
Displays the latitude and longitude of the reference airport gate.
Changes to dashes when a new reference airport entered.
Entry blanks at lift–off.
Displays UTC time as updated from the GPS.
The displayed value cannot be selected, modified or overwritten.
Display is blank if no valid GPS time is available.
Push – displays the INIT/REF INDEX page.
Displays the last FMC calculated position.
Displays the GPS present position. During preflight, the GPS POS may not
display due to satellite availability, performance, or unfavorable geometry.
The set inertial position entry is optional because the IRS has continuous access
to the GPS position. Entry may be accomplished by selecting the most accurate
latitude/longitude from LAST POS, REF AIRPORT, GATE, GPS POS, or make a
manual entry.
If an entered position fails the IRU internal check, the CDU help window message
ENTER INERTIAL POSITION displays. If the entered position fails the IRU
check after the position is entered a second time, the CDU help window message
ALIGNMENT REINITIATED displays.
The entered position is compared with the FMC origin airport position. If the
entered position is not within 6 NM of the FMC origin airport position, the CDU
help window message INERTIAL/ORIGIN DISAGREE displays.
Dashes display when any IRU or AHRU is in the alignment mode and can receive
a new position update. Enter the most accurate inertial position to remove any
accumulated IRU position errors.
2
GATE
3
Coordinated Universal Time (UTC)
4
INDEX
5
Last Position (LAST POS)
6
GPS Position (GPS POS)
7
Set Inertial Position (SET INERTIAL POS)
August 14, 2009
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