*
Push 1R, the last position

*
Push 2R, the reference airport position

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Page 69 D633W101-BEJ May 05/2003

FMCS -POS INIT 1/3 PAGE

*
Push 3R, the reference airport gate position

*
Push 4R, the GPS position. Then line select this data into 5R.

This page also permits the entry of a manual heading.
When the ADIRU has failed and the SAARU navigation parameters are valid, SET HDG shows above line 5L.
Page Selections
Push 6L <INDEX to show the INIT/REF INDEX.
Push 6R <ROUTE to show the appropriate RTE page.
Push the NEXT PAGE or PREV PAGE mode keys to go to the other POS INIT pages.
Training Information Point
Refer to the Flight Operations Manual for more information related to the this page.
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777 AIRCRAFT MAINTENANCE MANUAL

FMCS -POS INIT 1/3 PAGE

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FMCS -POS REF 2/3 and 3/3 PAGES

Purpose -POS REF Page 2/3 and 3/3
There are two additional POS REF pages. The POS REF page 2/ 3 shows this position information:
*
FMCF position calculation

*
Inertial position

*
Global positioning system (GPS) position

*
Radio position.

You can use these pages to update the FMCF position calculation so it to matches either the inertial, GPS, or radio position.
The POS REF page 3/3 shows the left and right GPS positions and the left and right FMCF positions.
This page lets the operator remove the GPS position update from the FMCFs at 5R.
The POS REF pages also permits the flight crew to show the relative bearing and distance from the FMCF position at 6R.
Page 2/3 access
To get access to the POS REF 2/3 page, do one of these steps:
*
Push the NEXT PAGE function key while on the POS INIT page

*
Push POS REF on the PROGRESS page.

Color -POS REF Page 2/3
All text on this page is white.
Information -POS REF 2/3 Page
*
GPS

*
RADIO

*
INERTIAL

*
LOC-GPS

*
LOC-RADIO

*
LOC.

Line 1L shows the FMCF position. The header shows if the inertial, GPS or radio is the primary source for update of the current FMCF position.
Line 2L shows the inertial position from the ADIRU.
Line 3L shows the GPS position.
Line 4L shows the radio position.
Line 5L shows the FMCF position accuracy in nautical miles (NM). This shows to the nearest 1/10NM if the accuracy is more than or equal to 10NM. It shows to the nearest 1/100NM if the accuracy is less than 10NM.
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FMCS -POS REF 2/3 and 3/3 PAGES

Line 5R shows the three or four letter identifiers of the navigation stations that the FMCF uses in the radio navigation solution. The header shows the active radio update mode as one of these:
*
DME/DME

*
LOC/LOC

*
VOR/DME.

Operations -POS REF Page 2/3
To update the computed FMCF position so it matches the inertial, GPS or radio position, first push 1R, ARM>. This arms the FMCF position update function and the line changes to ARMED. Then do one of these:
*
Push either 2R, NOW> to update the FMCF position to match the inertial position

*
Push 3R, NOW> to update the FMCF position to match the GPS position

*
Push 4R, NOW> to update the FMCF position to match the radio position.

Page Selections
Push 6L <INDEX to show the INIT/REF INDEX page.
Page 3/3 Access
To get access to the POS REF 3/3 page, do one of these steps:
* Push 6R BRG/DIST> while on the POS REF page 2/3
EFFECTIVITY
BEJ ALL

*
Push NEXT PAGE function key while on the POS REF page 2/ 3

*
Push PREV PAGE function key while on the POS INIT page.

Color -POS REF 3/3 Page
All text on this page is white except the GPS NAV ON/OFF indication. The active condition is green and the not active condition is white.
Information -POS REF 3/3 Page
Line 1l shows the left GPS sensor unit position.
Line 2l shows the right GPS sensor unit position.
Line 3L shows the position from the left FMCF.
Line 4L shows the position from the right FMCF.
Operations -POS REF 3/3 Page
To toggle the GPS position update of the FMCF ON/OFF, do one of these:
*
Push 5R when ON shows and the GPS data is inhibited from the FMCF navigation solution
　
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