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Notice of proposed rulemaking (NPRM).

We propose to adopt a new airworthiness directive (AD) for all Airbus Model A300 B4-603 and A300 B4-622 airplanes; Model A300 B4-600R series airplanes; Model A300 C4-605R Variant F airplanes; Model A300 F4-600R series airplanes; and Model A310-203, A310-221, A310-222, A310- 304, A310-322, A310-324, and A310-325 airplanes. This proposed AD was prompted by an evaluation by the design approval holder (DAH) that indicates that a section of the fuselage structure above the forward cargo door is subject to widespread fatigue damage (WFD). This proposed AD would require an inspection for cracks of the fastener and tooling holes at certain locations and a check of the diameter of the holes, and repair or modification of the affected fuselage structure if necessary. We are proposing this AD to address the unsafe condition on these products.

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