T-34C AIRCRAFT SYSTEMS FAMILIARIZATION
Fault lights are steady illumination, yellow lights located on the annunciator panel at the bottom
of the instrument panel in both cockpits. The panel consists of two columns of four lights that
visually identify the existence of a specific fault. The individual lights are labeled INVERTER,
GENERATOR, L FUEL LOW, R FUEL LOW, FUEL PRESS, CHIP, LDG LIGHT, and
BLEED AIR. A fault light will extinguish only when the condition that caused the light to
illuminate is corrected.
Master Caution Light
The master caution light is located at the top of the instrument panel above the airspeed indicator
in each cockpit. It is a yellow flashing light that illuminates the words MASTER CAUTION.
When flashing, the light alerts the pilot to scan the annunciator panel for an illuminated fault
light. The master caution light can be extinguished by correcting the fault that caused it to
illuminate or by depressing the face of the light.
Function lights are steady-illumination, green lights that visually identify the existence of a
specific function. They are located beneath the fault lights on each annunciator panel and
labeled IGNITION and AUTO IGN. When illuminated, the IGNITION light indicates that the
ignition system is operating and the AUTO IGN light indicates that the autoignition system is
armed. The function lights do not activate the MASTER CAUTION light.
Annunciator Test Switch
The annunciator test switch is located below the annunciator panel in the center of the TEST
panel in each cockpit. It is a push-button type switch that tests the illumination of the landing
gear handle, WHEELS, MASTER CAUTION, inboard gear door position indicator, fault and
function lights. The WHEELS and MASTER CAUTION lights flash while the landing gear
handle, inboard gear door position indicator, fault and function lights do not. The switch tests
the lights only in the respective cockpit.
The interior lighting system consists of individual instrument post lights, utility lights, console
lights, instrument and console flood lights. All interior lighting is white with the exception of the
utility light, which has optional red lighting. All interior lighting is operated by DC power.
All instruments are lighted externally by post lights located on the upper left and right corner of
each instrument, and instrument floodlights located beneath the glare-shield in each cockpit. The
lights are controlled by individual rheostats located on the interior lights control panel, right
console, both cockpits. The rheostats have a group labeled INST with individual labels LTS