Summary
This action withdraws a notice of proposed rulemaking (NPRM) that proposed a new airworthiness directive (AD), applicable to certain Dornier Model 328-300 series airplanes. That action would have required replacement of the hydraulic line tube assemblies with improved tube assemblies and flexible hose assemblies. Since the issuance of the NPRM, the Federal Aviation Administration (FAA) has received information from Fairchild Dornier indicating that the replacement has already been carried out on all of the affected airplanes. Accordingly, the proposed rule is withdrawn.