Summary
We are superseding an existing airworthiness directive (AD) for the specified ECF model helicopters. This AD results from a mandatory continuing airworthiness information (MCAI) AD issued by the European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Union. The MCAI AD states that some cracks have been discovered in the spar of the upper fin on Model AS355N helicopters. Due to the fin design similarity between AS350 and AS355 helicopters, this AD action applies to both helicopter models. Modifying the upper and lower fin attachment is intended to prevent failure of a spar, loss of a fin, a separated fin hitting a rotor, and subsequent loss of control of a helicopter.
Directive Details
AD Number
FAA-2011-0923
Document Number
2012-365
Type
Rule
Publication Date
January 24, 2012
Effective Date
February 8, 2012
Affected Manufacturer
Eurocopter France (ECF) Model AS350B, B1, B2, B3, BA, and D
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2011-0923
Topics
Official Documents
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