As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FRESH AIR DUCT (PN 1695540113) ROUTED THROUGH CABIN FUSELAGE STRUCTURE SEEMS TO HAVE CAUSED GALVANIC CORROSION TO FUSELAGE STRUCTURE THAT HAD BEEN COVERED BY UPHOLSTRY PANELS. THE CONDITION FOUND IS TO SUCH OF AN EXTENT THAT IN SOME AREAS LOCATED AT OR ABOUT F/S 132 RT AND LT SIDE OF FUSELAGE HAS HAD STRUCTURE COMPLETELY CORRODED AWAY. (K)