TM 1-1520-238-10
9-22
Change 11
Section III. CAUTION/WARNING LIGHT
EMERGENCY PROCEDURES.
9.17 CAUTION/WARNING LIGHT EMERGENCY
PROCEDURES.
For caution/warning light emergency procedures, refer-
ence Table 9-1.
NOTE
During maneuvering flight, a momen-
tary reduction of oil pressure may occur
in the main transmission and engine
nose gear-boxes causing a low oil pres-
sure caution/warning light. As long as
the caution/warning light goes out
within 10 seconds, no action is
required.
During approaches, maneuvering flight
and other areas of 4/rev vibration, the
VIB GRBX caution light may illuminate.
As long as the caution light extin-
guishes within 5 - 10 seconds after exit-
ing the 4/rev environment, no action is
required.
FD/LS 19 Pressure indications of 50 or
99 lbs are normally wiring problems. If
these indications are observed, make
appropriate entry on DA form 2408-13
series forms.
Table 9-1. Caution/Warning Light Corrective Actions
WORD SEGMENT
CORRECTIVE ACTION
NOTE
Illumination of a light that is information/system status shows condition of system components.
Mission accomplishments may be degraded. Mission requirements will dictate further actions.
For conditions which cause the lights to illuminate, see Tables 2-3, 2-4, and 2-5.
MASTER CAUTION PANELS:
MASTER CAUTION
Check Master/Caution Warning and Caution Panels for
other lights. If no other light is flashing LAND AS SOON AS
POSSIBLE.
LOW RPM ROTOR
See LOW RPM ROTOR (Warning Light On) NP Failed Low
(paragraph 9.5.7).
FIRE APU
See APU Compartment Fire (paragraph 9.10.2).
ENGINE 1 OUT
See Single-Engine Failure Low Altitude/Low Airspeed and Cruise
(paragraph 9.5.3).
ENGINE CHOP
Chop collar – Reset
