AD FAA-2019-0576

The FAA is withdrawing a notice of proposed rulemaking (NPRM) that proposed to adopt a new airworthiness directive (AD) that would have applied to all The Boeing Company Model 747-400, 747-400F, 747-8F, and 747-8 series airplanes. The NPRM was prompted by reports of dual flight management computer (FMC) cold starts during a critical flight phase such as takeoff and approach. The NPRM would have required an inspection to determine if certain software is installed, installation of FMC operational program software (OPS) and a software configuration check, and applicable concurrent requirements. Since issuance of the NPRM, the FAA determined that the installation of new software, as proposed in the NPRM, does not resolve the unsafe condition identified in the NPRM. Accordingly, the NPRM is withdrawn.