AD 99-11-13 64 FR 29781

This amendment adopts a new airworthiness directive (AD) that applies to certain Cessna Aircraft Company (Cessna) Model 402C airplanes. This AD requires inspecting the forward, aft, and auxiliary wing spars for cracks; repairing any cracks found; and reporting the results of the inspection to the Federal Aviation Administration (FAA). This AD is the result of an accident of one of the affected airplanes where the right-hand wing failed just inboard of the nacelle at Wing Station (WS) 87. Investigation of this accident revealed fatigue cracking of the forward main spar that initiated at the edge of the front spar forward lower spar cap. The actions specified by this AD are intended to detect and correct any cracks in the forward, aft, and auxiliary wing spars, which could result in reduced or loss of control of the airplane.