BEECHCRAFT
Duchess
76
Section
VIII
Handling,
Serv
and
Maint
vicing the oil system is provided through access doors in the
engine cowling.
NOTE
Due to the canted position
of
the engines, the
dipsticks are calibrated for either
right
or left en-
gines and are
not
interchangeable.
The oil should be changed every 100 hours and the oil filter
should be changed
every
50 hours, under normal operating
conditions. The engines should
be
warmed to operating tem-
perature to assure complete draining of the oil. The cowling
should be removed from the engines for changing the oil and
the oil filter. Check the used oil filter for metal particles. (Refer
to the Duchess
76
Maintenance Manual.)
The engine manufacturer recommends the use
of
ashless
dispersant oil after the oil consumption has stabilized,
or
after
the first 50 hours of operation.
In
order to promote faster ring
seating and oil control, a straight mineral type oil conforming
to MIL-L-608'? may
be
used until the oil consumption has
stabiliL:~d,
notto exceed 50 hours of operation. Oil
of
season-
al
viscosity, added to maintain the proper oil level during this
period, must comply
with
MIL-L-6082. After the oil consump-
tion has stabilized or after the first 50 hours of operation,
aviation
grade
ashless
dispersant
oil
complying
with
MIL-L-22851 should
be
used.
January
1978
8--15
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