Airworthiness Directives; Air Tractor, Inc. Models AT-400, AT-500, AT-600, and AT-800 Series Airplanes

Summary

The Federal Aviation Administration (FAA) proposes to update an existing airworthiness directive (AD) for Air Tractor, Inc. Models AT-400, AT-500, AT-600, and AT-800 series airplanes, which would replace the requirement for repetitive inspections of the engine mount and terminate the reporting requirement of the current AD. The proposed update aims to detect and correct cracks in the engine mount, which could lead to engine failure.