Supplemental NPRM Issued for Cessna 525

The FAA has issued a supplemental notice of proposed rulemaking revising an earlier proposed airworthiness directive for Cessna 525 Citations equipped with certain part number air conditioning compressor motors. The NPRM proposed to require inspection of the number of hours on the A/C compressor hour meter, inspection of the logbook and replacement of the brushes on specified compressor motors or deactivation of the A/C system until replacement of the brushes. It also required reporting information related to the replacement of the brushes. The supplemental NRPM provides correct steps for deactivation of the A/C compressor motor.