What was found
FOUND MULTIPLE AREAS OF CORROSION UNDER AFT CHIN FAIRING. MECHANICALLY REMOVED AREAS OF CORROSION LOCATED UNDER AFT CHIN FAIRING ON FUSELAGE OUTER SKIN IAW CESSNA 680 SRM 51-70-02. FOUND CORROSION BLENDS TO BE BEYOND LIMITS IAW CESSNA 680 SRM 51-70-02 EXCEEDING .002" OF MATERIAL REMOVED FROM NOMINAL THICKNESS. REPAIRED LEVEL 2 CORROSION ON LOWER FUSELAGE SKIN UNDER AFT CHIN FAIRING PER AQRD ERO-988406 REV. IR TITLED "N339QS LOWER FUSELAGE SKIN CORROSION" DATED APR 20 2026 SUPPORTED BY FAA FORM 8110-3 DATED 04/20/2026.