MANUFACTURER: Eurocopter France Model SA-365C,
SA-365C1, SA-365C2, SA-365N, SA-365N1, AS-365N2, AS 365 N3, and
SA-366G1 Helicopters SUBJECT: Airworthiness Directive 2011-12-07
SUMMARY: This amendment adopts a new
airworthiness directive (AD) for the specified Eurocopter France
This action requires visually inspecting the adhesive bead
between the bushing and the Starflex star (Starflex) arm for a
crack, a gap, or loss of the adhesive bead, inspecting the Starflex
arm ends for delamination, and replacing the Starflex if any of
these conditions are found. This amendment is prompted by three
cases of deterioration of a Starflex arm. In two of these cases,
the deterioration caused high amplitude vibrations in flight,
compelling the pilot to make a precautionary landing.
The actions specified in this AD are intended to prevent failure
of the Starflex, high-amplitude vibrations in flight, and
subsequent loss of control of the helicopter.