Summary
We are revising an earlier proposed airworthiness directive (AD) for all Model 767 airplanes. That NPRM proposed repetitive inspections to detect fatigue cracking in the wing skin, and corrective actions if necessary. That NPRM was prompted by reports of cracking in the upper wing skin at the fastener holes common to the inboard and outboard pitch load fittings of the front spar which could result in the loss of the strut-to-wing upper link load path and possible separation of a strut and engine from the airplane during flight. This action revises that NPRM by reducing compliance times. We are proposing this supplemental NPRM to correct the unsafe condition on these products. Since these actions impose an additional burden over that proposed in the NPRM, we are reopening the comment period to allow the public the chance to comment on these proposed changes.