Beechcraft Duchess 76 - Fuel System Operation

BEECHCRAFT
Duchess 76
Section VII
Systems Description
333. ME-346 and after) is located between the Left
Magneto/Start and Right Magneto/Start switches on the
pilot's left subpanel.
]b~V§!g,rtgU,~ngagecl,-watniDglightWill '!
illl.lminateiWhem:lyeL'~lectricar'pbwer'iscbgihg;sGppliedt6I
the,sta:rter.3If the light remains illuminated after starting, the
starter relay has
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pqwer<may;resUIG~
PROPELLERS
The airplane is equipped with two Hartzell, 76-inch diameter,
constant-speed, full-feathering, two-blade
propellers.1BrQpgbl
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e
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yen':Pf9Re
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.wbic;oregl,JlCj.te§OYc:![Cj.qljC:;Qi! pressure·totheil'IUb.'fThe propel-
ler controls, on the control console, allow the pilot to select
the governor's rpm range. Springs and dome air pressure,
aided by counterweights, move the blades
to high pitch.
Engine oil under governor-boosted
pressure moves the
blades to the high rpm (low pitch) position.
The propellers should
be cycled occasionally during cold
weather operation. This
will help maintain warm oil in the
propeller hubs so that the oil will not congeal.
FUEL SYSTEM
The airplane is designed for operation ongrCide100(greeO) j
Qr~Q.ql+4-.(RJl,Ie)iaviation gasoline. The fuel system is an ON -
CROSSFEED - OFF arrangement. The fuel selector panel,
located on the lower portion of the center pedestal, contains
the fuel selector levers for each engine.
The fuel
is drawn from the respective tank through the fuel
strainer and to the fuel selector valve, located aft of the
firewaU in each ~acelle. From t~e tLi¥I..seleS!Pf,Y?iIYe!me fl,le'
passes throiJgfi achEk:k vahle and then thr~ughtt:):e,;.erigi@.~;·~~
driven fuel pump and delivered to the carburetor. T'he'cabrn'~j
heater, located in the nose compartment, uses fuel (approxH
mately 2/3 gallon per hour) from the right wirlgt?-f)~JbI~l,
system only. . .. . """
August, 1980
7-21