What was found
FOUL ODOR EMANATES FROM COCKPIT VENTS WITH AIR CONDITIONING ON. SMELLS LIKE RODENT URINE. NO NOTICEABLE ODOR IN CABIN. CABIN AIR PURGED WITH OZONE/PURIFIER. INSTALLED PROTECTIVE COVERING IN FORWARD CABIN AREA. REMOVED AND REPLACED CENTER FUSELAGE DRAIN ASSY. IAW AMM 53-05-00. CLEANED AND REMOVED DUST FROM COCKPIT CONDESER AS REQUIRED. REMOVED CO-PILOTS SEAT AND ACCESSED INSULATION BAGS UNDER RH COCKPIT & FORWARD CABIN FLOOR BOARDS. REMOVED & REPLACED ALL WET INSULATION FOUND UNDER FORWARD FLOOR BOARDS AND COCKPIT CONDENSER. CLOSED FLOOR BOARDS AND REINSTALLED CO-PILOT SEATS. CLEANED WORK AREA OF ALL PROTECTIVE COVERING. DONE IAW AMM 25-11-01 & AMM 25-81-04. NO ODOR REMAINS.