Airworthiness Directive · Amendment 39-9677 · Jetstream Model 4101 Airplanes
Jetstream Model 4101 Airplanes
All Model 4101 airplanes, certificated in any category.
This amendment clarifies information in an existing airworthiness directive (AD), applicable to all Jetstream 4101 airplanes, that currently requires a review of maintenance records to determine the time-in-service of the bearings in the starter/generators of both engines. It also establishes a new time-in-service limit for the bearings, and requires replacement of the starter/generator unit with a serviceable unit, if necessary. The actions specified in that AD are intended to prevent failure of the bearings of the starter/ generator, which could cause severe vibrations and resultant in-flight shutdown of one or both engines. This amendment clarifies the requirements of the current AD by specifying the name of the manufacturer of the starter/generator units that are affected by the requirements of this AD.
