What was found
NOTED CRACKS EXTENDING FROM 2 END RIVET ATTACHING HAT CHANNNEL P/N 45-110014-647 TO SKIN, P/N 58-100022-5. FURTHER INVESTIGATION FOUND TOP SKIN CRACKED 6 INCHES LONG, APPROXIMATELY 3 INCHES EACH SIDE OF HAT CHANNEL, PARALLEL TO RIVETS ATTACHING SKIN TO BUTT RIB. THIS AREA IS COVERED BY WING ROOT AND FUSELAGE RUBBER SEAL. IT IS THIS AGENT'S OPINION THIS AREA WAS POSSIBLY SAT ON, KNEELED ON, OR STOOD ON BY LINE PERSONNEL TO CLEAN SIDE WINDOWS OR DURING WASHING OF AIRCRAFT.