As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT DURING THE OPERATION OF THE VAPOR CYCLE AIR CONDITIONING SYS IT WAS NOTED THAT THE COMPRESSOR MOTOR WAS EXCESSIVE NOISE. DURING MX TROUBLESHOOTING IT WAS NOTED THAT THE ELEC DRIVE MOTOR WAS EMITTING VISIBLE SPARKS. THE DEFECTIVE MOTOR WAS REMOVED FROM SERVICE PN 1134104-1, SN 3026 MOTOR 1258HRS TT, BRUSHES 274.6HRS TT. OVERHAULED MOTOR INSTALLED IAW AMM, FT OK. NOTE MOTOR FAILED 1742HRS SHORT OF THE TBO.