As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE ODOR DURING APPROACH, FOLLOWED BY LOUD NOISE ON THE LEFT SIDE OF AIRCRAFT, FOLLOWED BY PACK 1 FAIL ON SHORT FINAL AND HOT AIR COMING THRU COCKPIT VENT. AIRCRAFT WAS GROUNDED. MAINTENANCE FOUND THAT THE AIR CYCLE MACHINE HAD THREE BROKEN BLADES AND REPLACED IAW AMM 21-51-05.