Beechcraft Duchess 76 - Page 183

BEECHCRAFT
Duchess 76
section VII
Systems Description
WARNING HORN SILENCE BUDON
An optional gear warning horn silence button allows the
pilot to manually silence the warning horn with either
throttle retarded, the landing gear retracted, and the flaps
retracted above approximately 16°. The push-to-silence
button is located next to the landing gear control switch
and is placarded "GEAR HORN SILENCE". A red light in
the button illuminates when the gear horn silence system is
activated.
When either throttle is retarded sufficiently to activate the
gear warning horn, the horn may be silenced with the
button. If the other throttle is then retarded, the warning
hom will again sound and cannot be silenced. After a
single throttle has been retarded and the resulting warning
horn silenced with the button, readvancing the throttle
resets the warning horn and it will again sound when either
throttle is retarded. The warning horn is also reset when
the landing gear are lowered. When the flaps are extended
beyond approximately 16°, the button will not silence the
warning horn.
CIRCUIT BREAKER
The landing GEAR MOTOR circuit breaker and the landing
GEAR CONTROL circuit breaker are located on the right
subpanel. The circuit breakers are the pull-and-reset type
and will pop out under overload conditions.
EMERGENCY EXTENSION
The landing gear can be manually extended by turning the
hydraulic pressure bypass valve 90° counterclockwise. The
valve is located under the access door on the floor in front of
the pilot's seat. When the system pressure is released, the
gear will fall into the down-and-\ocked position. The emer-
gency extension procedure is outlined in the EMERGENCY
PROCEDURES section.
August, 1980
7-12A