As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4346 THE CREW REPORTED THE COCKPIT SMELLED LIKE DEAD FISH. THE AIRCRAFT WAS REMOVED FROM SERVICE. CLEANED FLIGHT DECK IAW EMB AMM STANDARD PRACTICES. CLEANED AND VACUUMED COCKPIT FLOOR. MAINTENANCE LOOKED UNDER CENTER COCKPIT FLOORBOARD. ODOR DIMINISHED BUT STILL PERSISTED. THE AIRCRAFT WAS RETURNED TO SERVICE.