Pitot Heat (Optional); Static Air System; Vacuum System - Beechcraft Debonair 35-33 Pilot Operating Handbook

BEECHCRAFT
Debonair
33
PITOT HEAT (Optional)
Section VII
Systems Description
The pitot mast is provided with an electric heating ele-
ment which is turned on and off with a switch on the in-
strument panel. The switch should be ON when flying in
visible moisture. lt is not advisable to operate the pitot
heating element on the ground except for testing or for
short intervals of time to remove ice or snow.
STATIC AIR SYSTEM
The static system provides a source of static air to the flight
instruments through a flush static fitting on each side of
the airplane fuselage. Drain moisture accumulations from
the system by opening the access door on the side panel in
the rear baggage compartment and removing the section
of rubber hose. The rubber hose section should be re-
moved and the moisture drained from the line every 100
hours and after exposure to visible moisture, either in the
air or on the ground.
VACUUM SYSTEM
Vacuum for air driven gyroscopic flight instruments and
other air driven equipment is supplied by an engine driven
vacuum pump. An adjustable relief valve controls suction
by bleeding outside air into the vacuum pump. The relief
valve and an oil separator, which removes oil from the air,
are located on the forward side of the firewall.
A suction gage indicates system vacuum in inches Hg. This
instrument is located on the instrument panel; exact
location may vary according to panel configuration. The
vacuum should be maintained within the green arc for
proper operation of the air driven instrume nts.
April 1982
7-29