Airworthiness Directives; Airbus Model A310 and A300-600 Series Airplanes Equipped With SOGERMA-SOCEA Pilot, Co-Pilot, and Third Occupant Seats

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This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Airbus Model A310 and A300-600 series airplanes. This proposal would require repetitive inspections to detect distortion and/or cracks on the attachment brackets of the backrest recline control locks of certain seats. This proposal would also require replacement of cracked or distorted brackets and their associated attachment fittings with new parts, which would terminate the repetitive inspection requirements. This proposal is prompted by a report of failure of the bracket of the backrest recline control lock on a seat due to fatigue-related cracking. The actions specified by the proposed AD are intended to prevent such fatigue-related cracking and/or distortion, which could result in failure of the seat backrest attach fittings, which may lead to the uncommanded 50 deg. angle recline of the pilot or co-pilot seat, and, subsequently, the temporary inability of the pilots to control the airplane.