Summary
This action withdraws a notice of proposed rulemaking (NPRM) that proposed a new airworthiness directive (AD), applicable to certain Gulfstream Model G-IV series airplanes. That action would have required inspection of the data plate on the bottom of the hydraulic brake control module (HBCM) to verify the part and serial numbers, and replacement of the HBCM, if necessary. Since the issuance of the NPRM, the Federal Aviation Administration (FAA) has received new data indicating that the proposed actions have been accomplished on all affected airplanes; therefore, the previously identified unsafe condition no longer exists. Accordingly, the proposed rule is withdrawn.