As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FUSELAGE STA 17.00 RT SIDE WHERE BULKHEAD AND SUPPORT CONNECT TOGETHER BENEATH FLOORBOARD, IT WAS FOUND TO BE BADLY CORRODED IN AN AREA OF ABOUT 4 INCHES IN DIA AND LIGHTER CORROSION FOR ABOUT A 12 INCH DIAMETER. SUBMITTER STATED THAT SOMETHING WAS SPILLED IN THIS AREA. THE AIRFRAME HAS NO OTHER CORROSION.