Transport i infrastruktura · 19/09/1994

Airworthiness Directives; Lockheed Model 382 Series Airplanes

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Lockheed Model 382 series airplanes. This proposal would require inspection of a kingpin riser on the lower surface of the outer wing to determine fastener placement. The proposed AD also would require repetitive inspections for fatigue cracks in the kingpin riser if the fasteners are positioned outside certain limits, and repair, if necessary. This proposal is prompted by reports of insufficient distance between the center of the outermost fastener on the kingpin riser and the edge of the riser, which can adversely affect the fatigue resistance of the outer wing assembly. The actions specified by the proposed AD are intended to prevent structural failure of the lower surface of the outer wing due to fatigue cracks in the kingpin riser.