Table 2-8. Mission Control Panel Annunciator Legend
CAUSE FOR ILLUMINATION
Incoming call detected on mission voice order wire.
No. 1 OPR CALL
Operator No. 1 calling on ICS.
No. 2 OPR CALL
Operator No. 2 calling on ICS.
Quality of signal on air-to-air is deteriorating.
3 Ø AC OFF
Three phase AC power to INS is off.
BATT FEED FAULT
Ground fault detected in battery external power line.
The pressure in one of the UHF diplexers is low, and needs to be
recharged by maintenance personnel.
Quality of signal on air/ground/air link is deteriorating.
SPCL EQPT OVRD
Mission override switch in override position.
NO INS UPDATE
INS is not updating with GPS or TACAN information.
MISSION AC ON
Mission 3Ø 400 Hz AC is on.
INS is updating with GPS or TACAN information.
MISSION DC ON
Mission DC is on.
EXT AC PWR ON
External AC power is on.
EXT DC PWR ON
External DC power is on.
caution annunciator illuminates, the MASTER CAUTION will
illuminate, and will stay illuminated until the MASTER
CAUTION annunciator is pressed to reset the circuit. If a new
condition occurs, the light annunciator will be reactivated and
the appropriate annunciator panel annunciators will illuminate.
Clocks. One manually-wound 8-day clock is mounted
in the center of the pilot's control wheel and an electric digital
clock is mounted in the center of the copilot's control wheel.
Copilot's Clock. The copilot's clock (fig. 2-18) is a
five-function, six digit, clock-timer utilizing three button
operation. Each of the five functions can be selected for
viewing. This clock-timer has a liquid crystal display for
readability in sunlight and an internal light for night use. The
clock has an internal battery to maintain time when the aircraft
power is off.
Mode selection. The MODE button is pressed
to select the desired operation. The mode annunciator is
displayed above the mode identifiers. Pressing the MODE
button will advance the annunciator to the desired operation.
LC - Local Time
ZU - Zulu or Greenwich Mean Time
TR - Trip or Flight Timer
ET - Elapsed Time
DC - Downcounter with Alarm
Clock timer mode.
(a) Setting Local Time. Press the MODE
button to advance the annunciator to LC. To set hour, press
RST button once, then press ADV button and hold until correct
hour is displayed. To set minutes, press RST button once so
that minutes and seconds are displayed. (Always set to the next
Change 5 2-78A/(2-78B blank)