What was found
ENTIRE A/C FROM FD TO AFT GALLEY SMELLS OF ROTEN FISH OR TUNA FISH PILOT REFUSAL FOR ODOR, LOCKING FOR POSITIVE FIX PERFORMING WALK-THRU OF AIRCRAFT, ODOR IS PRESENT FROM FWD GALLEY THRU ENTIRE CABIN AND INTO AFT GALLEY, AIRCRAFT REQUIRES DEEP CLEAN, FISH BLOOD. UNLOCKING LOG FOR UPDATE CLEANED UP SPILLED IN FWD CARGO AND SPRAY CABIN AND FWD CARGO WITH ODOR NEUTRALIZER. REF AMM 51-78-00. REF ECRA 2011-01113 REMOVED AND REPLACED RECIRC HEPA FILTERS IN REF WITH AMM21-21-41. INSPECTED AFT CARGO. FOUND NO EVIDENCE OF FISH SMELL AND SPILLED FISH BLOOD. AFTER RECIRC FILTER REPLACEMENT, PERFORMED PACK BURNOUT AT MULTIPLE TEMP SETTINGS, REF AMM 21-00-00-615-802-A. SHUT DOWN APU, AND CLOSED AIRCRAFT. CHECKED AIRCRAFT AN HOUR LATER, NO ABNORMAL ODORS PRESENT IN CABIN OR CARGO COMPARTMENTS