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Thu, Oct 25, 2012

AD: Eurocopter France Helicopters

AD NUMBER: 2012-21-09

PRODUCT: Eurocopter France (Eurocopter) Model EC225 helicopters with certain epicyclic modules installed.
SUBJECT: Airworthiness Directive 2012-21-09
ACTION: Final Rule

SUMMARY: This AD requires inspecting the epicyclic module for the presence of a through-hole upstream of the magnetic plug. This AD is prompted by a report of a missing through-hole between the integrated collector and the magnetic plug, which would prevent the flow of chips from the integrated collector to the magnetic plug. This could result in the chip-detector system failing to detect deterioration of the main rotor mast lift bearing (lift bearing).

These actions are intended to detect a missing through-hole and prevent lift bearing failure and subsequent loss of control of the helicopter.

DATES: This AD becomes effective November 7, 2012.

FMI: AD

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