ENSTROM 280FX OPERATOR’S MANUAL 8-7
Rev. 6
Report No. 28-AC-020 Feb 21/12
d. Draining Fuel System
Fuel draining should be accomplished with the helicopter
in a nose-down attitude.
(1) Defuel through the filler neck, using a pump or
siphon.
(2) Final draining must be accomplished using the fuel
system drain valves.
(3) Be sure that drain valves are closed and secure
after completing defueling of the aircraft.
2. Engine Oil System Locations
The engine has a wet sump lubrication system located on
the bottom of the engine. Oil quantity is checked by the
use of a dipstick located inside the left panel door just
below the fuel tank. Oil is added to the engine through the
adjacent tube, using an automotive-type filler spout.
Lycoming recommends use of ashless dispersant oil at all
times (Refer to the latest revision of Lycoming Service
Instruction No. 1014) and recommends oil and filter
changes at every 50 hours of operation, and more
frequently if operated in dusty, dry climates.
a. Adding – Engine Oil System
(1) Visually check oil level on dipstick. Add oil (refer to
Table 8-1) to bring level to the eight (8) quart (FULL)
graduation mark.
NOTE
Total oil capacity for the engine oil system
(including oil lines and coolers) is 10 quarts. The
engine oil sump capacity is 8 quarts. The engine
oil dip stick is marked to correspond with the
engine oil sump capacity of 8 quarts (full) and 6
quarts (low).
(2) Secure filler cap.
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