As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OUT OF SCOPE FINDING, LOWER FUSELAGE SKIN AT STA 500I BULGING AROUND FASTENER HEADS. POSSIBLE CORROSION BETWEEN SKIN AND ATTACHING FUSELAGE FRAME THAT NEEDS EVALUATION. LOCATED JUST AFT OF A/C DUCT CONNECTION INLET. (REF: AAR NR 99983376)