As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING PACS GAVE A BURNING SMELL. LT PAC SWITCH DOES NOT APPEAR TO TURN OFF PROPERLY. MX ULTIMATELY R & R THE LT AIR CYCLE MACHINE PN OFF 2204540-4, SN OFF 83-665 IAW. MM 21-50-05 OPS CHECK IAW MM 21-50-00. NO SMOKE SMELL NOTED AND THE OPS CHECK WAS GOOD.