AD NUMBER: 2005-19-23
MANUFACTURER: Boeing
SUBJECT: Airworthiness Directive 2005-19-23
SUMMARY: The FAA is superseding an existing airworthiness directive (AD), which applies to certain Boeing Model 767 series airplanes. That AD currently requires repetitive inspections to detect discrepancies of the eight aft-most fastener holes in the horizontal tangs of the midspar fitting ofthe strut, and corrective actions if necessary. That AD also provides an optional terminating action for the repetitive inspections. inspections for cracks of the closeout angle that covers the two aft-most fasteners in the lower tang of the midspar fitting, and related investigative and corrective actions if necessary. This AD also reduces the inspection interval of the upper tang ofthe outboard midspar fitting; and provides an optional terminating action for the repetitive inspections. This AD results from a report of a crack in a closeout angle that covers the two aftmost fasteners in the lower tang of the midspar fitting; and the discovery of a crack in the lowertang of the midspar fitting under the cracked closeout angle. We are issuing this AD to prevent fatigue cracking in the primary strut structure and reduced structural integrity of the strut, which could result in separation of the strut and engine.

FMI: www.faa.gov/regulations_policies/airworthiness_directive