BEECHCRAFT
Duchess
76
Section
IV
Normal
Procedures
ensure proper preheat. A start with congealed oil
in
the
system may produce an indication of normal pressure im-
mediately after the start, but then the oil pressure may de-
crease when residual oil
in
the engine is pumped back with
the
congealed oil in the sump.
If
an
engine heater capable of
heating both the engine sump and cooler is not available, the
oil should be drained while the engine is hot and stored in a
warm
area until the next flight.
If there is no oil pressure within the first
30
seconds of
running, or if oil pressure drops after a few minutes of ground
. operation, shut down and check for broken oil lines, oil cooler
leaks
or
the possibility of congealed oil.
NOTE
It is advisable
to
use external power for starting
in cold weather.
During warm-up, monitor engine temperatures closely, since
it is quite possible
to
exceed the cylinder head temperature
limit in trying to bring up the oil temperature. Exercise the
propellers several times to remove cold oil from the pitch
change mechanism. The propellers should also be cycled
occasionally in flight.
During letdown and landing, give special attention to engine
temperatures, since the engines will have a tendency toward
overcooling.
TAXIING
Avoid taxiing through water, slush, or muddy surfaces if
possible. In cold
weather,
water, slush,
or
mud,
when
splashed onto landing gear mechanisms or control surface
hinges may freeze, preventing free movement and resulting
in structural damage.
April
1979
4-17
To Next Page
Loading...
