AD NUMBER: 2011-25-02

MANUFACTURER: BRP-Powertrain GmbH & Co. KG Reciprocating Engines
SUBJECT: Airworthiness Directive 2011-25-02
ACTION: Final rule; request for comments

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for BRP-Powertrain GmbH & Co. KG Rotax 912 F2, 912 F3, 912 F4, 912 S2, 912 S3, 912 S4, 914 F2, 914 F3, and 914 F4 reciprocating engines.

This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

During a production process review, a deviation in the manufacturing process of certain part number (P/N) 888164 crankshafts has been detected, which may have resulted in a latent defect. This condition, if not corrected, could lead to crack formation on the power takeoff side of the crankshaft journal, possibly resulting in failure of the crankshaft support bearing, in-flight engine shutdown and forced landing, damage to the aeroplane and injury to the occupants.
We are issuing this AD to prevent in-flight failure of the engine and forced landing.

DATES: This AD becomes effective December 22, 2011

FMI: AD