As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF THE FLIGHT ATTENDANTS REPORTED A BURNING ODOR IN THE MID TO AFT CABIN, NO VISIBLE SMOKE BUT STRONG ODOR. DECLARED YELLOW EMERGENCY, FOLLOWED COM, ODOR DISSIPATED WHEN PACK 2 WAS SHUTOFF AND LANDING WAS UNEVENTFUL. REMOVED SEALS AND CLEANED LUBE FROM HEAT EXCHANGER CONNECTIONS AND INSTALLED NEW SEALS USING MOLY COAT LUBE AND REPLACED CABIN RECIRCULATION FILTERS.