As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORT OF AIR CONDITIONING U/S. INSP OF COMPRESSOR DRIVE ON RT ENGINE ACCESSORY MOUNT FOUND THE QUILL SHAFT DRIVE SHEARED DUE TO A FAILURE OF THE FWD BRG. 3 MOUNT BOLTS WERE ALSO SHEARED. QUILL SHAFT, FWD AND AFT BRGS, MOUNT BRACKET AND ATTACHING HARDWARE REPLACED. ACFT RETURNED TO SERVICE.