STANDBY MAGNETIC COMPASS.
The standby magnetic compass, located in the
overhead control panel, is used in the event of failure of
the compass system, and for instrument cross check.
Readings should be taken only during level flight since
errors may be introduced by turning or acceleration. A
compass correction chart, indicating deviation factors, is
located in the magnetic compass.
Annunciator Panels. Three annunciator
panels are installed. One is a warning panel with red
fault annunciators, and the others are caution/advisory
panels with amber and green annunciators. The warning
panel is mounted near the center of the instrument
caution/advisory panel is located in the center subpanel
(fig. 2-5). The mission annunciator/ advisory panel is
located in the copilot's sidewall. Some flight operations
involve indications from the mission control panel (fig.
4-1). Illumination of a red warning annunciator signifies
the existence of a hazardous condition requiring
immediate corrective action. An amber caution
annunciator signifies a condition other than hazardous
requiring pilot attention. A green advisory annunciator
indicates a functional situation. Tables 2-6, 2-7, and 2-8
provides a list of causes for illumination of the individual
annunciators. In frontal view, the panels present rows of
small opaque rectangular annunciators. Word printing
on the respective indicator identifies the monitored
function, situation, or fault condition, but cannot be read
until the annunciator is illuminated. Blank annunciators
(no word printing) are a non-functioning annunciator.
The bulbs of all annunciator panels are tested by
activating the ANNUNCIATOR TEST switch, located in
the copilot's subpanel near the caution/advisory panel.
The system is protected by the 5-ampere circuit
breakers placarded ANN PWR and ANN IND in the
overhead circuit breaker panel (fig. 2-6). The
annunciator system annunciators are dimmed when the
MASTER light switch is ON and the pilot's flight
instrument lights are illuminated. The annunciators are
automatically reset to maximum brightness if:
The main aircraft power (both
DC generators) is OFF.
The INSTRUMENT PANEL light
switch is rotated clockwise.
The MASTER light switch is off.
The MASTER light switch is ON
and the PILOT INSTRUMENTS LIGHT switch is OFF.
(red). Two MASTER WARNING annunciators, one
located in each side of the glareshield (fig. 2-14), are
provided to alert the crew of a hazardous condition. Any
time a warning annunciator illuminates, the MASTER
WARNING annunciator will illuminate, and will stay
illuminated until the MASTER WARNING annunciator is
reset. If a new condition occurs, the annunciator will be
reactivated, and the applicable annunciator panel
annunciator(s) will illuminate.
(amber). Two, MASTER CAUTION annunciators, one
located in each side of the: glareshield, adjacent to the
MASTER WARNING annunciator (fig. 2-14), are
provided to alert the crew of a situation, other than
hazardous, requiring the crews attention. Whenever a
caution annunciator illuminates, the MASTER CAUTION
annunciator will illuminate, and stay illuminated until the
MASTER CAUTION annunciator is reset. If a new
condition occurs, the annunciator will be reactivated and
the appropriate annunciator(s) will illuminate.
Description. A digital quartz
chronometer is mounted in the center of both the control
wheels (fig. 2-20). Each quartz chronometer is a five-
function, clock/timer that is controlled by three push-
button switches, located directly below the six-digit,
liquid crystal display.
Operation. The MODE button is
pressed to select the desired mode of operation. The
mode annunciator is displayed above the mode
identifiers, and advances to indicate each of the
LC - Local Time
ZU - Zulu or Greenwich Mean Time
FT - Trip or Flight Timer
ET - Elapsed Time
DC - Downcounter with Alarm
Local Time Mode (LC). Press the
MODE button to advance the annunciator to LC. To set
the hour, press the RST button once, then press and
hold the ADV button until the correct hour is displayed.