Summary
The FAA withdraws a notice of proposed rulemaking (NPRM) that proposed a new airworthiness directive (AD) for certain The Boeing Company Model 767 airplanes equipped with General Electric Model CF6- 80C2 engines. The NPRM proposed to require modifying a relay installation and associated wiring of the engine cowl anti-ice system and performing a functional test of the thrust reverser system. The NPRM also proposed to require replacing the operational program software of certain indicating/recording systems. Since we issued the NPRM, we have received new data that indicate the unsafe condition would not be adequately addressed by the proposed action. The manufacturer has issued new service information to address the unsafe condition. Consequently, we issued new rulemaking action that positively addresses the unsafe condition identified in the NPRM, and eliminates the need for the actions proposed in the NPRM. Accordingly, the NPRM is withdrawn.