Pilot Operating Handbook
H3 Sport 135 HP
SECTION 7
SYSTEMS
Dynali_POH_H3 Sport 135 HP Rev. 3.3 – Issue date 15.01.2021 Page
66
sponge clean and watch the oil level. No intervention is required as long as the lip of
the bearing flange fills up clearly.
The MTG is equipped with a T° sensor and with a chip detector, wired to a warning
light in the cockpit, which indicates the pilot of every metallic particle detected.
The conical spiral gearing of the main transmission gearbox is a part that wears out
rapidly. The gearbox should be emptied every 50 h to filter the oil or renew it and also,
the magnetic plug should be surveyed.
Every 300 h, the main transmission gearbox should be opened in order to inspect the
conical gear and the bearings.
7.5
MAIN ROTOR
The rotor mast is made of Cr-Mo steel and designed to bear a load of +22 g.
The blades are made of extruded high resistance aluminum. As a safety precaution,
their service life is provisionally limited to 1200 h before complete inspection. They can
be used in all-weather conditions except for hail or icing conditions. A mark is traced
on the upper side of the blade to check for possible permanent elongation of the
blades. They are held by stainless steel sheets and aluminum blade roots.
Four stop bearings with oblique contact allow for the blade root to oscillate to set the
pitch. They are over-dimensioned and can support excess speed up to 600 RPM.
These bearings oscillate very little and the bearing balls, over the long term can make
traces in their seating, causing shimmy in the cyclic pitch control. They should be
replaced as soon as the shimmy can be felt.
The ball joints of the blade rods have a little play ; they should be greased with
traditional grease.
The seven bolts and the two blade screws are set in position on a template.
Dismounting them may cause misalignment. When removing the blades, it is done by
unscrewing the 2 x 4 M8 bolts, holding the blade supports.
7.6
TAIL ROTOR
The tail rotor is equipped with four blades in order to keep a small diameter which
provides for a greater degree of safety. The blades have a N° relative to their
manufacturing balancing. It is not possible to replace one single blade. Blades must all
be replaced together.
Summary of Contents for H3 Sport 135 HP
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