Summary
We are revising an earlier proposed airworthiness directive (AD) to supersede Airworthiness Directive (AD) 2010-04-03, for all Airbus Model A310 series airplanes. AD 2010-04-03 currently requires accomplishing repetitive detailed inspections for cracking around the fastener holes in certain wing top skin panels between the front and rear spars on the left- and right-hand sides of the fuselage, and repair if necessary. The NPRM proposed to continue to require the repetitive detailed inspections, and would also require supplemental repetitive ultrasonic inspections for cracking around the fastener holes in wing top skin panels 1 and 2 at rib 2, and repair if necessary. This action revises the NPRM by expanding the inspection area to include rib 3 due to widespread fatigue damage. We are proposing this supplemental NPRM (SNPRM) to detect and correct fatigue cracking around the fastener holes, which could result in reduced structural integrity of the airplane. Since these actionsimpose an additional burden over those proposed in the NPRM, we are reopening the comment period to allow the public the chance to comment on these proposed changes.