Airworthiness Directives; Fairchild Aircraft, Inc. SA226-T, SA226-T(B), SA226-AT, and SA226-TC Airplanes

摘要

This document withdraws a notice of proposed rulemaking (NPRM) that would have applied to certain Fairchild Aircraft, Inc. (Fairchild) Models SA226-T, SA226-T(B), SA226-AT, and SA226-TC airplanes. The proposed airworthiness directive (AD) would have required you to replace the existing brake master cylinders with brake master cylinders of improved design. The proposed AD was the result of an accident of a Model SA226-TC airplane where it was believed that the master cylinder did not allow the brake hydraulic pressure to totally release at the beginning of the takeoff roll. The result of this incident was dragging brakes and overheating left-hand main wheel brakes with a fire in the wheel well area. Fairchild has adequately demonstrated to the Federal Aviation Administration (FAA) that the design of the brake master cylinder on the affected airplanes was not the cause of the referenced accident. Therefore, AD action is not necessary to address the conditions on these airplanes and we are withdrawing the NPRM.