As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACKS ARE GOING TO HIGH FLOW; UNCONTROLLED. HOT OIL SMELL AND COCKPIT TEMP BECAME HOT. THEN PACKS WENT TO NORMAL FLOW AND ICE SHOT OUT OF VENTS. SUSPECT LEFT PACK IS UNCONTROLLABLE.<[01] FOUND LT PACK ZONE DUCT TEMP EXTREMELY LOW AND NOT MODULATING WITH ICE ON CONDENSER. REMOVED AND REPLACED LT PACK STANDBY TEMP CONTROL VALVE IAW AMM 21-51-11; OPS CHECK & LEAK CHECK GOOD. PACK ZONE DUCT TEMP NOW NORMAL.