TM 55-1510-219-10
LANDING GEAR RELAY on the overhead circuit breaker panel (fig. 2-26).
b.
Landing Gear Down Position Indicator Lights. Landing gear down position is indicated by three green lights on
the left subpanel, placarded GEAR DOWN. These lights may be checked by operating the ANNUNCIATOR TEST
switch. The circuit is protected by a 5-ampere circuit breaker, placarded LANDING GEAR IND, on the overhead circuit
breaker panel (fig. 2-26).
c.
Landing Gear Position Warning Lights. Two red bulbs, wired in parallel and activated by microswitches
independent of the GEAR DOWN position indicator lights, are positioned inside the clear plastic grip on the landing gear
control switch. These lights illuminate whenever the landing gear switch is in either the UP or DN position and the gear is
in transit. Both bulbs will also illuminate should either or both power levers be retarded below approximately 79 to 81%
NI when the landing gear is not down and locked. To turn the switch lights OFF, during single-engine operation, the
power lever for the inoperative engine must be advanced to a position which is higher than the setting of the warning
horn microswitch. Extending the landing gear will also turn the lights off. Both red lights indicate the same warning
conditions, but two are provided for a fail-safe indication in the event one bulb
