As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FA'S AND PASSENGERS REPORT AN ACRID/DEAD ANIMAL SMELL FROM 2-3 ROWS FWD OF AFT LAC TO 2-3 ROWS AFTE OF AFT LAV. SMELL STARTED JUST AFTER TAKEOFF. INTIALLY THE SMELL WAS VERY STRONG. IT SUBSIDED TO MANAGEABLE FOR THE REMAINDER OF FLIGHT. REPLACED WATER SEPARATOR AND SECURED FILL LINE CLAMP. SERVICED LAV. CKS OK.