Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain McDonnell Douglas Model DC-9 and Model DC-9-80 series airplanes, Model MD-88 airplanes, and Model C-9 (military) series airplanes. This proposal would require modification of the slant panel insulation blankets on the slant pressure panel of the main landing gear. The proposal would also require a visual inspection to detect discrepancies of the left and right seal assemblies of the overwing emergency exit door, and replacement of any discrepant door seal. This proposal is prompted by a report that the flaps and landing gear did not extend or retract properly due to water accumulation in the slant pressure panel area. The actions specified by the proposed AD are intended to prevent such water accumulation, which could result in the failure of the flaps or landing gear to properly extend or retract.