As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4302 THE CREW REPORTED AN OVERPOWERING TUNA FISH ODOR. MAINTENANCE ACCEPTED THE AIRCRAFT TO FIND AN OVERPOWERING TUNA FISH ODOR IN THE FLIGHT DECK. SPRAYED AIR FRESHENER FOR FLIGHT CONTINUOUSLY BUT AIRCRAFT STILL SMELLED LIKE A DEAD FISH BAKING IN THE SUN. TREATED COCKPIT WITH ODOR ELIMINATING SPRAY AS REQUIRED. THE AIRCRAFT WAS RETURNED TO SERVICE.