777 AMM 飞机维护手册 导航 Navigation 2(42)

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EFFECTIVITY BEJ ALL
High speed buffet is the maximum maneuver speed. The high speed buffet shows as a hollow yellow bar. The bar extends from the bottom of the maximum operating speed symbol. The maximum operating speed symbol is the red and black barber pole symbol which comes from the warning electronic system (WES).
V2 is the takeoff safety speed. V2 shows in green next to the climb out speed tick on the airspeed tape. V2 goes away when the flaps begin to retract.
VR is the takeoff rotation speed. VR shows in green next to the rotation speed tick on the airspeed tape. VR goes away after takeoff.
V1 is the takeoff decision speed. V1 shows in green next to the decision speed tick on the airspeed tape. V1 goes away after takeoff.
VREF is the landing approach speed when the flaps are extended. A green REF and a bar shows next to the airspeed tape.
Flap maneuver speeds show the flight crew the necessary flap selection for the current takeoff or cruise/approach speed. The retract or extend speed shows as a tick mark on the airspeed tape with labels for the flap selections.
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FMCS -PRIMARY FLIGHT DISPLAY (PFD)

VMIN is the minimum speed limit of the airplane when the flaps/ slats extend. VMIN shows as a hollow yellow bar that extends up from the top of the stick shaker symbol. The stick shaker symbol is a red and black barber pole symbol. The stick shaker symbol comes from the WES.
Compass Data
The active FMCF sends this compass data to the primary display system to show on the PFD:
*
Heading

*
Track.

The air data inertial reference unit (ADIRU) sends heading and track data to the PFDs when the active FMCF fails.
EFFECTIVITY BEJ ALL  34-61-00 
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777 AIRCRAFT MAINTENANCE MANUAL

FMCS -PRIMARY FLIGHT DISPLAY (PFD)

EFFECTIVITY BEJ ALL  34-61-00 
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777 AIRCRAFT MAINTENANCE MANUAL

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FMCS -NAVIGATION DISPLAY (ND)

General
The flight management computing function (FMCF) sends navigation display data to the primary display system (PDS) to show on the navigation display (ND).
Display Data
The active FMCF sends navigation data to the NDs for all display modes. If both FMCFs fail, the on-side CDU sends the navigation data.
There are two types of navigation data: dynamic data and background data. Dynamic data changes as a function of time. Background data is stationary data that does not move as a function of time.
Dynamic Data
The active FMCF sends this dynamic data to show on the NDs via the PDF:
*
Track (TRK)

*
Heading (HDG)

*
Ground speed (GS)

*
Wind data -direction, speed, and angle. This shows when true airspeed is greater than 100 knots and wind speed is greater than 5 knots

*
Active waypoint (magenta). This is the fly to waypoint. When the airplane crosses it, the waypoint color goes to white and the next fly to waypoint becomes magenta

EFFECTIVITY
BEJ ALL

*
Altitude range arc. This shows the range to the mode control panel (MCP) altitude

*
VNAV path deviation. This shows as a vertical scale and magenta pointer when the airplane goes through the top of descent profile point. The scale range is +/-420 feet in 50 foot increments to a maximum of 9999 feet

*
Estimated time of arrival (ETA) -FMCF or time to go (TTG) -CDU

*
Distance to go (DTG). DTG to the active waypoint shows in nautical miles (nm) when greater than 100 nm and in tenths at less than 100 nm

*
Altitude profile points. These are along the flight plan to show flight mode or vertical flight path changes, top of climb (T/C), top of descent (T/D), step climb (S/C), end of descent (E/D)

*
Route. The route shows magenta when active, cyan when inactive, and white dash lines for modifications

*
Airplane position

*
FMC position update mode. This shows the data the FMCFs use for position update (GPS, lOC, DME/DME, VOR-DME, INERTIAL)

*
Tuning mode. This shows as an A (auto tune) or M (manual tune).

The active FMCF sends this dynamic data to the NDs:
*
Track

*
Heading

*
Ground speed

*
Wind data.

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FMCS -NAVIGATION DISPLAY (ND)

*
When the active FMCF fails, the air data inertial reference unit Waypoints of current flight plan
*
(ADIRU) sends wind data, ground speed, track, and heading Other waypoints (LAT/LON only). data to the ND.
　
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