As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED, FLIGHT STATION AIR CONDITIONING SYSTEM HOWLING AND SMELL BAD. SHUT DOWN AIR CONDITIONING SYSTEM. FOUND FLIGHT STATION COOLING TURBINE FAILED. REPLACED COOLING TURBINE IAW MM SMP 581 21-50. OPS AND LEAK CK NORMAL. LP 18732, ITEM 1.