PRIMARY DISPLAY SYSTEM -BAROMETRIC ALTITUDE AND VERTICAL SPEED
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PRIMARY DISPLAY SYSTEM -PFD HEADING AND TRACK
General
A partial compass rose of approximately 80 degrees shows at the bottom of the PFD. The compass rose shows this data:
*
Heading and track
*
Heading reference
*
Selected heading or track.
Heading and Track
The current heading shows as a white (W) triangular pointer above the compass rose. The track line shows as a white (W) line that extends up from the center of the compass rose (off screen) and moves in response to track data.
Heading Reference
The heading reference shows automatic or manual selections in the bottom right part of the compass rose. MAG in green (G) shows when the heading reference switch is in the NORM position. TRU (G) shows in a white box when the switch is in the TRUE position. When the reference switches from TRUE to MAG, a green highlight box appears around MAG for 10 seconds.
Selected Heading or Track
A selected heading or selected track shows magenta (M) both digitally and by a bug that shows the value on the compass rose. The digital readout shows in the lower portion just left of center. An H follows the value for selected heading and a T follows the value for selected track. The selected heading bug is in the shape of an M (bow tie). The bug is on the outer portion of the compass rose. The selected track bug is in the shape of a V and is in the inner portion of the compass rose. Use the heading/track selector on the mode control panel (MCP) to select a heading or track.
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PRIMARY DISPLAY SYSTEM -PFD HEADING AND TRACK
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PRIMARY DISPLAY SYSTEM -PFD FAULT ANNUNCIATIONS
General
The primary flight display shows data from many systems. The validity of the data determines what shows on the display. A no computed data (NCD) condition removes data from the display. An invalid condition removes the data and the display shows a failure flag.
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PRIMARY DISPLAY SYSTEM -PFD FAULT ANNUNCIATIONS
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PRIMARY DISPLAY SYSTEM -PFD NCD AND FAIL CONDITIONS -1
General
The display function in the AIMS cabinets evaluates inputs from the airplane systems.
A no computed data (NCD) status causes information on the display to go away.
A fail status causes information on the display to go away and a fail flag to show.
NCD and Failed Conditions
The chart shows the conditions for:
*
Instrument landing system (ILS)
*
Co-located DME
*
Radio altimeter (RA) system
*
Decision height (DH)
*
Flight mode annunciations (FMA).
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PRIMARY DISPLAY SYSTEM -PFD NCD AND FAIL CONDITIONS -1
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PRIMARY DISPLAY SYSTEM -PFD NCD AND FAIL CONDITIONS -2
General
The display function in the AIMS cabinets evaluates inputs from the airplane systems.
A no computed data (NCD) status causes information on the display to go away.
A fail status causes information on the display to go away and a fail flag to show.
NCD and Failed Attitude Conditions
The chart shows the conditions for the attitude area on the PFD.
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PRIMARY DISPLAY SYSTEM -PFD NCD AND FAIL CONDITIONS -2 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：777 AMM 飞机维护手册 指示和记录系统 2(25)
