ENSTROM 280FX OPERATOR’S MANUAL 8-17
Rev. 6
Report No. 28-AC-020 Feb 21/12
(3) Attach high pressure nitrogen bottle to strut valve.
(4) Adjust regulator on nitrogen bottle to desired
pressure (reference Table 8-5).
(5) Loosen 3/4 inch nut valve, turn until resistance is
felt, open one-half turn more; this will allow
nitrogen to enter strut. Close and tighten 3/4 inch
nut.
CAUTION
Ground resonance can result if helicopter is
operated when oleo strut extension is incorrect.
Table 8-5. Oleo Strut Service Pressure
Strut Location Service Pressure
Forward Oleo Struts 400 psi
Aft Oleo Struts 450 psi
NOTE
Check for proper extension of strut when
helicopter is sitting on ground after servicing.
Refer to Item 8.a above.
(6) Reinstall landing gear fairing.
9. Ground Handling Wheels
a. Each skid tube has provisions for a manually operated
wheel assembly. To lower the wheels (raise the aircraft):
(1) Install wheel bar on ground handling wheel axle
with the handle pointed aft.
(2) Remove lock pin.
(3) With a steady lifting motion, rotate bar 180°
forward and install lock pin when holes line up.
(4) To raise the wheels (lower the aircraft), reverse
steps 1 through 3.
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level of the 280FX Rotorcraft Flight Manual.
UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED
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