Airworthiness Directives; Cessna Model 500, 501, 550, and 551 Airplanes

This document corrects information in an existing airworthiness directive (AD) that applies to certain Cessna Model 500, 501, 550, and 551 airplanes. That AD currently requires a one-time inspection of the brake stator disks to determine to what change level they have been modified (if any), and related investigative and corrective actions if necessary. That AD also requires that the existing markings on the piston housing of certain brake assemblies be eliminated. This document corrects the compliance time for the inspection for cracked or broken stator disks on certain airplanes. This correction is necessary to ensure that affected airplanes are given sufficient time to comply with the requirements of this AD.