Airworthiness Directives; Jetstream Aircraft Limited HP137 Mk1, Jetstream Series 200, and Jetstream Models 3101 and 3201 Airplanes

Résumé

This document proposes to adopt a new airworthiness directive (AD) that would apply to Jetstream Aircraft Limited (JAL) HP137 Mk1, Jetstream series 200, and Jetstream Models 3101 and 3201 airplanes. The proposed AD would require repetitively inspecting the main landing gear (MLG) pintle to cylinder interface for cracks, and replacing any cylinder that has a crack exceeding certain limits. Reports of MLG cracks in the area of the pintle to cylinder interface on three of the affected airplanes prompted the proposed action. The actions specified by the proposed AD are intended to prevent failure of the MLG caused by cracks in the pintle to cylinder interface area, which, if not detected and corrected, could result in loss of control of the airplane during landing operations.