*
LAND 3.
Radio Altitude and Minimums
Radio altitude shows as a digital readout in the bottom center portion of the attitude area when the radio altitude is at or below 2500 feet. A highlight box shows for ten seconds as the altitude goes below 2500 feet.
Radio minimums (decision height-DH) shows as a digital readout near the lower left side of the altitude tape. The operator sets the RADIO value on the onside EFIS control panel. An amber alert shows as the radio altitude goes below the RADIO value.
31-61-00
Page 73 D633W101-BEJ Sep 05/2002
PRIMARY DISPLAY SYSTEM -PRIMARY FLIGHT DISPLAY OVERVIEW
Time Critical Warning (TCW) Messages
There are three time-critical warning messages. The two ground proximity warning system (GPWS) and one engine messages show on the PFD at the bottom center of the attitude area. These messages are the highest priority messages in the flight deck. Immediate flight crew intervention must follow to keep the airplane in a safe operating environment.
The GPWS message WINDSHEAR shows red during a windshear alert condition.
The GPWS message PULL UP shows red during a pull up alert condition.
The message ENG FAIL shows red during a failed engine condition.
If more than one condition exists, only one message shows in the priority above.
EFFECTIVITY BEJ ALL 31-61-00
Page 74
D633W101-BEJ Sep 05/2002
PRIMARY DISPLAY SYSTEM -PRIMARY FLIGHT DISPLAY OVERVIEW
EFFECTIVITY BEJ ALL 31-61-00
Page 75
D633W101-BEJ Jan 05/2002
777 AIRCRAFT MAINTENANCE MANUAL
THIS PAGE IS INTENTIONALLY LEFT BLANK
31-61-00
Page 76 D633W101-BEJ Jan 05/2002
PRIMARY DISPLAY SYSTEM -PFD ATTITUDE AREA
General
The attitude area has a pitch scale with a horizon line, bank pointer and scale, sky and ground shading, and a fixed airplane symbol. The dynamic symbols of the display move in response to the air data inertial reference system (ADIRS) pitch and roll outputs.
Roll Attitude
The bank pointer moves to show roll against the fixed bank scale. The bank scale shows ±60 degrees of bank and the indices are at 10, 20, 30, 45, and 60 degrees. The bank pointer and slip/skid indicator turn amber when the bank is equal to or greater than ±35 degrees.
Pitch Attitude
The pitch scale moves against the fixed airplane symbol. The pitch lines are every 2.5 degrees from -90 degrees to +90 degrees. The sky/ground shading shows airplane attitude at a quick glance.
Integrated Flight Director Cue
The integrated flight director cue shows in the sky/ground area. The pitch command shows as a horizontal movement of the cue. The roll command shows as a tip movement of the cue. The cue is magenta in color.
EFFECTIVITY
BEJ ALL
Flight Path Vector (FPV) and Flight Path Angle (FPA)
The FPV symbol shows the flight path angle and drift angle. The FPA is relative to the horizon line. Drift angle is the difference between airplane track and airplane heading. You use the FPV switch on the onside EFIS control panel to show the symbol. The symbol shows when there are valid pitch and bank commands from the AFDS, and valid pitch and roll information from the ADIRS.
The selected flight path angle shows the FPA selected on the mode control panel (MCP).
Traffic Alert and Collision Avoidance System (TCAS) Resolution Advisory Commands
TCAS resolution advisory commands show on the attitude display as three red bands. This makes a symbol similar to a rising runway. Pilots must avoid this area(s) inside the lines during a traffic encounter.
Slip/Skid Indication
The slip/skid indication shows the lateral acceleration of the airplane by the displacement of the lower portion of the bank pointer. With no lateral acceleration, the pointer and rectangular section align.
31-61-00
Page 77 D633W101-BEJ Sep 05/2002
PRIMARY DISPLAY SYSTEM -PFD ATTITUDE AREA
Pitch Limit Indication
The pitch limit indication shows the remaining pitch angle to stick shaker activation for the current conditions. They show as amber eyelash symbols. They show during flap extension.
Marker Beacon Indication
The marker beacon indication shows in the upper right area of the attitude display. These are the indications that may show:
*
IM (inner marker) white
*
MM (middle marker) amber
*
OM (outer marker) blue.
The indication shows as the airplane flies over a marker beacon. During a marker beacon functional test, the symbol FT shows. A circle encloses the symbols. The beacon displays flash at the rate normal for each beacon, IM-high, MM-medium, or OM-low.
EFFECTIVITY BEJ ALL 31-61-00
Page 78
D633W101-BEJ Sep 05/2002
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(23)
