TM 1-1520-238-10
2-78
Table 2-3.
Master Caution Panel Indications
Word Segment
Color
Illumination Parameter or Fault
MASTER CAUTION
AMBER
Alerts both crewmembers to scan both their master caution/warning
panels and caution/warning panels to identify fault condition.
LOW RPM ROTOR
RED
Nr is less than 94%.
FIRE APU
RED
Fire has been detected in the APU area or aft deck area.
ENGINE 1 OUT
RED
Np is below 94% or NG is below 63% on No. 1 engine. (NP disabled when
the PWR lever is not in FLY).
ENGINE CHOP
RED
Both engines have been electrically retarded to idle power.
ENGINE 2 OUT
RED
NP is below 94% or NG is below 63% on No. 2 engine. (NP disabled when
the PWR lever is not in FLY).
HIGH RPM ROTOR -701
ENGINE
RED
Nr is more than 104%.
HIGH RPM ROTOR
-701C ENGINE
RED
Nr is more than 108%.
BUCS FAIL
RED
One of the following BUCS components has indicated a failure
a. Control position transducer failure or misadjustment.
b. Flight control actuator malfunction.
c. BUCS tracer wire failure.
d. DASEC NO-GO.
e. BUCS select trigger pressed.
f. BUCS circuit breaker out.
g. No ac power to the DASEC.
h. No primary hydraulic pressure.
PRESS TO TEST
WHITE
When depressed, all master caution panel and caution/warning panel
segments, plus all other advisory lights, are illuminated within that crew
station for test.
2.52.1 Pilot and CPG Caution/Warning Panels.
The
caution/warning panels, for the pilot and CPG (fig 2-44)
are described in tables 2-4 and 2-5. Primarily cautionary in
nature, the panels also include red warning segments.
Often a specific fault indicated on the pilot panel will only
light a general system segment on the CPG panel. Illumi-
nation of a segment on one crewmembers panel will not
cause illumination of the MASTER CAUTION light in the
other crew station.
a. Warning and Caution Segment Dimming.
Dim-
ming of all caution/warning light segments is controlled by
the INST control on both the pilot and CPG INTR LT con-
trol panels (fig 2-42) for the respective crew station. When
the INST control is in the OFF position, caution/warning
lights are bright; any other position will cause the respec-
tive lights to go to a preset dim condition.
