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M16 (C) TANDEM TRAINER
MAINTENANCE MANUAL
16.
Verify that the brake shoe (1) really touches the belt pn A28. If this is not the case, set it correctly;
17.
Verify that there is a play between belts and pulleys, even if it is a small one;
18.
Reposition the propeller pn 125 and tighten the locking bolts pn 284;
19.
At the end of this operation (see section 3.2.3.), proceed with an efficiency test.
3.4
ROTOR HEAD INSPECTION
(See Fig. 3.4/1)
The rotor head is of essential importance for the gyroplane. A correct and careful maintenance can avoid troubles
and problems that can interfere with flight operations and by consequence reduce safety.
WARNING:
Due to the peculiarity of the rotor head assembly, its maintenance must be done only by authorised
personnel, with the following exceptions: visual checks, standard greasing, frictioning of the controls
and rotor installation.
3.4.1
VISUAL CHECKS
(See Fig. 3.4/1)
WARNING:
Visual checks have to be done according to the checklist, either before every flight or before scheduled
maintenance. There are many aspects that the performer must pay attention to, so as to be able to
understand the general condition of the rotor head assembly, the type of operation required and the
conditions of operation.
The following factors must be taken into account when evaluating the state of the rotor head assembly:
a)
General condition of the paint of the notched gear pn 061.
b)
Absence of abrasions and/or parts where paint has been removed.
c)
Oxidation of bolts and nuts.
d)
Lubrication of the notched gear pn 061.
e)
Presence of safety pins pn AN 416‐1.
f)
Correct locking (1) of the bolts AN5‐40 A for fastening the aluminium rotor head pn 066 with wire and
tightening marks (see also fig. 3.1.3).
g)
Freedom of movement of the rotor brake lever pn 201.
h)
State of the teeter bearings pn NKXR 15 Z (only if rotor is not installed).
Presence of anomalies:
a)
Burning or blackening of the paint of the notched gear are due to using the system with rotor brake pn
201 engaged during flight, where the friction caused by the braking action of the brake linings pn 208
generates the overheating of the notched gear pn 061 which then burns the paint.
b)
Abrasions and/or parts where paint has been removed can reveal rubbing or wear, as well as anomalous
deformations. It is essential to recognize and understand the reason that has generated this state before
flying again.
c)
The oxidation of bolts and nuts can reveal the operative conditions of the gyroplane (high humidity level
or use in salty environment).
d)
A correct lubrication of the notched gear pn 061 teeth avoids oxidation and reduces wear.
ISSUE
A_November 2012
.
PAGE
43
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