As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUDNED: PILOT REPORTS STRONG SMELL ON ENTIRE CABIN AND COCKPIT, FLIGHT ATTENDANT SAID ODOR SMELLED LIKE BURNED FOOD. DEPRESSURIZED AIRCRAFT AS QRH PROCEDURE AND SMELL WENT AWAY. AFTER LANDING TURNED PACKS AND BLEEDS ON AND STRONG SMELL CAME BACK AFTER 2 MINUTES. MAINTENANCE ACCOMPLISHED JOBCARD 43L00051001 AND FOUND #2 PACK EXCHANGER CONTAMINATED WITH COFFEE. : MAINTENANCE ACCOMPLISHED CARD 43L19121001 AS REQUESTED, RAN PACKS FOR 2 HOURS AFTER CLEANING WITH NO ODORS NOTED.