Airworthiness Directives; General Electric Company CF6-45 and CF6-50 Series Turbofan Engines

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We propose to supersede an existing airworthiness directive (AD) that applies to General Electric Company (GE) CF6-45 and CF6-50 series turbofan engines. The existing AD requires replacing certain forward and aft centerbodies of the long fixed core exhaust nozzle (LFCEN) assembly. Since we issued that AD, we became aware that other forward and aft centerbodies are also affected. This proposed AD would add certain new centerbodies requiring replacement. This proposed AD is prompted by the discovery of more part numbers (P/Ns) of centerbodies requiring replacement. We are proposing this AD to prevent the forward and aft centerbody of the LFCEN assembly from separating from the engine, damage to the engine, and damage to the airplane.