The jamming of a servo valve of main rotor servo actuators cannot be detected
when both main hydraulic systems are functioning as the second hydraulic
system will guarantee the full efficiency of the actuators.
Such kind of failure can be noticed only during the system check on ground
before takeoff (refer to Section 2).
The jamming of the servo valve of tail rotor servo actuator will result in an
increase of pedal control force of approximately 35 kg in hovering and less in
forward flight.
PROCEDURE
Airspeed : Reduce gradually avoiding pull
up manoeuvers; recommended
maximum 90 Kts and 25° bank
angle in order to maintain ac-
ceptable control loads.
Land as soon as practical.
WARNING
Following the loss of tail rotor servo actuator avoid landing
and/or operating in conditions which require a high degree of
maneuverability (i.e. avoid operating in enclosed areas, helicopter
heading not windward, in particular with wind from the right).
LANDING GEAR MALFUNCTION
If the landing gear will not extend and/or will not lock:
PROCEDURE
EDU 2 (AUXILIARY) : Check hydraulic utility systems
pressure within limits.
Landing gear lever lock : Set to EMERG (Turn clockwise
breaking the lockwiring).
RFM A109E
3-44 R.A.I. Approved
Rev. 11
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