TM 1-1510-262-10
Table 2-7.
Caution/Advisory Annunciator Panel Legend -- Continued
CAUTION/ADVISORY ANNUNCIATOR
NOMENCLATURE
COLOR
CAUSE FOR ILLUMINATION
#1 IGN ON
Green
No. 1 engine ignition/start switch on, No. 1 engine auto ignition switch armed
and engine torque below 20 percent
L BL AIR OFF
Green
Left environment bleed air valve closed
Right environmental bleed air valve closed
R BL AIR OFF
Green
#2 IGN ON
Green
No. 2 engine ignition/start switch on, No. 2 engine auto ignition switch armed
and engine torque below 20 percent
No. 2 ice vane extended
#2 VANE EXT
Green
#1 AUTOFEATHER
Green
No. 1 autofeather armed
AIR COND N 1 LOW
Green
No. 2 engine RPM too low for air conditioning load
External power connector plugged in
EXTERNAL POWER Green
EXT DC PWR/ON
Green
External DC power is on
Brake deicing system is on
BRAKE DEICE ON
Green
#2 AUTOFEATHER
Green
No. 2 autofeather armed
BT00104
Table 2-8.
Mission Control Panel Annunciator Legend
MISSION ANNUNCIATOR
NOMENCLATURE
COLOR
CAUSE FOR ILLUMINATION
Yellow
CRYPTO ALERT
Security equipment is holding cipher key when aircraft s wheels are
down and TWTA INTLK DEFEAT toggle switch on mission status panel
is set to OFF position.
Yellow
CALL
A request for VOW communication is being received by mission
equipment.
Yellow
3 AC OFF
Loss of three-phase AC power from either mission inverter if 3 AC
CONTROL BUS CROSS TIE switch is set to OFF. Indicates a loss of
three-phase AC power from both mission inverters if 3 AC CONTROL
BUS CROSS TIE switch is set to ON.
Yellow
CABIN OVERTEMP
Cabin area containing mission equipment is overheating.
Yellow
No power to mission equipment.
MISSION POWER
Yellow
RADOME HOT
Over temperature condition inside IDL nose radome.
ELINT LEFT
Yellow
Left ELINT power supply failure.
Yellow
SPCL EQPT OVRD
Aircraft s normal +28V DC source has been overridden to provide
remaining +28V DC power sources to mission equipment. Enabled when
MISSION CONTROL switch is set to ORIDE position.
Yellow
ELINT RIGHT
Right ELINT power supply failure.
ANT MALF
Yellow
Tail boom antenna is not in proper position as set by ANT ORIDE switch
or landing gear uplock switch.
Yellow
NO INS UPDATE
No INS update data from TACAN, data link, or GPS to aircraft s INS
equipment
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