As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA-ON FLIGHT NUMBER 2101, FLIGHT ATTENDANT SAYS CABIN VERY WARM. AIR FROM VENTS SMELLED LIKE OLD GYM SOCKS FOR FIRST 10 MINUTES OF FLIGHT. REMOVED AND REPLACED PACK TEMP CONTROL VALVE. LEAK AND OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.