Summary
This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Raytheon Aircraft Corporation (Raytheon) Model 1900D airplanes. The proposed action would require replacing the right-hand exhaust stack for both the left and right engines. The proposed action results from reports of wing skin damage (with associated fuel seepage) and cabin window damage caused by the heat of the right-hand exhaust stacks on the affected airplanes. The actions specified by the proposed AD are intended to prevent wing skin de-bonding or warping of the cabin windows because of the heat generated by the engines' right-hand exhaust stacks.