Summary
This action withdraws a notice of proposed rulemaking (NPRM) that proposed to revise an existing airworthiness directive (AD), applicable to GE CF6-45 and CF6-50 series turbofan engines. That action would have revised an existing AD to require the same inspections on reworked high pressure compressor (HPC) rear shafts as those HPC rear shafts covered by the current amendment. That proposal was prompted by the need to ensure that the additional reworked HPC rear shafts receive the same inspections as part numbers covered by the current amendment. Since that NPRM was issued, the FAA has determined that the repetitive inspections of reworked HPC rear shafts will instead be incorporated into the final rule, AD 2001-12-20, for a new design HPC air duct. Accordingly, the proposed rule is withdrawn.