(2)
ARM annunciation is displayed in white.
C. A/P F/D pitch modes are displayed in the top section of the EADI.
(1)
Engaged modes appear in green letters. They are TO/GA, V/S, ALT ACQ, ALT HOLD, VNAV SPD, VNAV PATH, MCP SPD, G/S and FLARE.
(2)
Armed modes appear in white letters, they are G/S, V/S, and FLARE.
D. A/P F/D roll modes are displayed in the top section of the EADI.
(1)
Engaged modes appear in green letters. They are HDG-SEL, VOR/LOC, and LNAV.
(2)
Armed modes appear in white letters, VOR/LOC is the only roll mode which can be armed.
E. DFCS status annunciation provides an indication to the flight crew of the operating status of the DFCS system.
(1) DFCS status annunciation, CMD, F/D and TEST are green annunciation. CWS P, CWS R, and 1 CH are yellow annunciation.
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22-11-01
ú ú 12 Page 15 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
6.
7.
8.
A
737-300/400/500MAINTENANCE MANUAL
(2) When a mode is engaged a green box is displayed around the engaged
mode for 10 sec. Yellow is used for CWS R or CWS P.Autoflight Status Annunciator
_____________________________
A. One autoflight status annunciator (also called FMS warning annunciator) is provided for each pilot to indicate fail/warn status of the autopilot, autothrottle and flight management computer.
B. The captain's autoflight status annunciator is located in the upper right corner of the P1 panel and the first officer's autoflight status annunciator is located in the upper left corner of the P3 panel.
C. The autopilot status annunciator is comprised of three warning light
switch/indicators with press-to-reset features and a test switch.Electronic Attitude Director Indicator (EADI)
______________________________________
A. The EADIs display basic attitude information, ILS data, radio altitude, and autopilot mode data. They also display fault data for the input systems in the event of a failure. The display consists of a standard attitude display centered on the screen. Text, which represents various flight parameters, is located in each corner of the screen. The captains and first officers EADIs are located in the captains (P1) and first officers (P3) instrument panels, respectively.
B. The display is a shadow masked vertical raster CRT with three color guns (red, blue, green). It utilizes magnetic deflection and electrostatic focus control. Failure of one of the color guns will result in a monochromatic display. The three colors are used to generate other color combinations such as magenta, cyan, yellow, and white.
C. The internal circuit operation and unit temperature are monitored by the symbol generator BITE circuits. Any detected faults are displayed on the screen.
D. The front panel includes the screen, an inclinometer, and a light sensor. The light sensor detects cabin lighting intensity and varies the display brightness accordingly. The inclinometer is a standard ball-type and is used as an attitude backup. The display area is approximately 5 inches square.
Control Wheel Steering (CWS) Force Transducers
______________________________________________
A. Three identical force transducers are installed in the captains and first officers control columns, two in the pitch axis and one in the roll axis. The pitch axis force transducers are located in the forward control quadrants below each control column. The roll axis force transducer is mounted between the control shaft and aileron drum below the captain's control column.
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