(a)
IRS/ILS (approach only)
(b)
IRS/DME/DME (distance and distance)
(c)
IRS/DME/VOR (distance and bearing)
(d)
IRS only
(5)
The FMC also uses information from the IRSs and the ADC to calculate inertial and wind vectors.
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26 27
3 45678
2
1
NOTE:
910112829303132
33 35 342
ND DISPLAY (PLAN MODE) ND DISPLAY (MAP MODE)
36
FMC EDIT
BOUNDARY
37
38
NO. SYMBOLS ON PLAN AND MAP MODES COLOR
13121110987654321191817161514 DME SYMBOLNORTH UP POINTER *HDG/TRK SCALEDISTANCE TO GOETA (MINUTES, TENTHS OF MINUTES)WAYPOINT IDENTIFIERDRIFT ANGLE POINTERTRACK READOUTHEADING/TRACK INDEXTRACK ANNUNCIATORACTIVE FLIGHT PLANACTIVE WAYPOINTNAVAID IDENTIFIERDME DISTANCEEXTENDED RUNWAY CLSELECTED RUNWAY (<40 NM)HOLDING PATTERNMAG/TRUE ANNUNCIATORSELECTED HDG MARKER GWWWMWGWWGMMMG/CG/CWWWW/M/C
NO. SYMBOLS ON PLAN AND MAP MODES COLOR
32313029282726252423222120383736353433 AIRPORT SYMBOLINACTIVE WAYPOINTVERTICAL DEV POINTERVERTICAL DEV SCALERANGE SCALE (HALF RANGE VALUE)CONDITIONAL WAYPOINT (TOP OF CLIMB)GROUND SPEED - TOTAL AIR SPEEDWIND DIRECTION/WIND SPEEDSTRAIGHT TREND VECTORVOR SYMBOLVORTAC SYMBOLSELECTED HDG VECTOROFFSET PATHROUTE DATAFLIGHT PLAN CHANGESAIRPLANE REF SYMBOLCURVED TREND VECTORWIND DIRECTION POINTERAIRPORT SYMBOL WITH RUNWAY (>40 NM) MWWWWWM/WM/WCW/MCCWWWWG/CG/CM
COLOR LEGENDG - GREENM - MAGENTA
C - CYAN
PLAN MODE ONLY *
FMC FLIGHT PLAN DATA ABC
W - WHITE
EFIS - ND Displays
Figure 28
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SPEED TAPE
Primary Flight Display
Figure 29
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~2
L-DME
L-ADF
R-DME
R-ADF
L-PFD
R-PFD ~2
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L33454
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MAINTENANCE MANUAL
B. Initialization of position and velocity filters
(1) The FMC's position and velocity is automatically initialized when the following occurs:
(a)
An IRU becomes valid after power up.
1) The FMCs position will become valid when it receives a valid signal from any of the IRUs. The position and velocity filters will then be initialized.
(b)
AT takeoff
1) The FMCs position is initialized to the runway's threshold latitude and longitude. If any displacement has been entered by the crew, then the displacement is used to correct the IRS errors at takeoff.
(c)
Recovery from an FMC power interrupt.
1) For short term power interrupts, the filters are initalized to their last position. There is no observable position change.
2) If both FMCs are powered up simultaneously, the master FMC will be selected by the FMC master logic. The FMC position will be initialized to the IRU selected by the master FMC. If they are not powered up simultaneously then the FMC which is powered up first will be the initializing FMC.
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