As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING REMOVAL OF THE COMPRESSOR SUPPORT ASSY FOUND PULLEY ) WAS CHAFFING AGAINST THE COMPRESSOR DRIVE SUPPORT ). BOTH PARTS WERE WORN DUE TO FRICTION.ALSO FOUND THEQUILL SHAFT TEETH BADLY DAMAGED AND THE BEARING EDGE WORN.SUSPECT THE BEARING LOCATED IN THE CAP SLID AND CAUSED PLAY IN THE PULLEY DRIVE. ALL DAMAGED PARTS REPLACED.