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Fri, Apr 05, 2013

AD: Eurocopter France Helicopters

AD NUMBER: 2013-06-07

PRODUCT: Eurocopter France (Eurocopter) Model SA-365N1, AS-365N2, and AS 365 N3 helicopters.
SUBJECT: Airworthiness Directive 2013-06-07
ACTION: Final Rule

SUMMARY: This AD requires revising the Limitations section of the Rotorcraft Flight Manual (RFM) to prohibit flight in instrument meteorological conditions (IMC) or night visual flight rules (VFR) for each helicopter with a vertical gyro unit GV76-1 installed upon a non-reinforced shelf in the rear cargo compartment.

Also, this AD requires modifying the GV76-1 vertical gyro unit shelf and testing for correct function of the navigation systems.

This AD was prompted by flight crew reports of deviations between the displayed attitude on the attitude display screen and the independent electromechanical standby attitude indicator. The actions of this AD are intended to prevent an undetected flight display error of a slow drift in the roll axis, disorientation of the pilot, and subsequent loss of control of the helicopter.

DATES: This AD is effective May 9, 2013.

FMI: AD

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