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Thu, Sep 01, 2011

AD: Bombardier DHC-8-400

AD NUMBER: 2011-18-15

MANUFACTURER: Bombardier, Inc. Model DHC-8-400 Series Airplanes
SUBJECT: Airworthiness Directive 2011-18-15
ACTION: Final rule; request for comments

SUMMARY: This AD results from mandatory continuing airworthiness information (MCAI) originated 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:

There have been three in-service reports of cracked barrel nuts found at the front spar locations of the wing-to-fuselage attachment joints. Additionally, three operators have reported finding a loose washer in the barrel nut assembly. Failure of the barrel nuts could compromise the structural integrity of the wing-to-fuselage attachments.

The unsafe condition could result in separation of the wing from the airplane during flight.

DATES: This AD becomes effective September 15, 2011

FMI: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/4EFCCA83B1DA12EE862578FD00482736?OpenDocument

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