Summary
This action withdraws a notice of proposed rulemaking (NPRM) that proposed a new airworthiness directive (AD), applicable to certain Boeing Model 737-100, -200, -300, -400, and -500 series airplanes. That action would have required modification of certain filter module assemblies of the generator control units (GCU). Since the issuance of the NPRM, the Federal Aviation Administration (FAA) has received new data that indicate that the unsafe condition identified in the NPRM does not exist. Accordingly, the proposed rule is withdrawn.