What was found
AIRCRAFT DATA TAG ON LOWER TAIL HAS APPROX 6 AREAS OF CORROSION AROUND PERIMETER OF AIRCRAFT DATA TAG. REMOVED AIRCRAFT DATA TAG LOCATED ON LOWER TAIL. MECHANICALLY REMOVED AREAS OF CORROSION LOCATED UNDERNEATH AIRCRAFT DATA TAG ON SKINS P/N 692029-1 AND 6912030-1 IAW C680 SRM 51-70-02. CORROSION DEFINED AS LEVEL 1 PER C680 MM 51-10-01 TABLE 2 DEFINITIONS AND IS BEYOND BLENDING LIMITS OF .002 PER C680 SRM 51-70-02. SUBMITTED FINDINGS TO CESSNA ENGINEERING. PERFORMED CORROSION BLEND REPAIRS PER CESSNA/TEXTRON AVIATION MEMO REF: 10509M1 DATED DECEMBER 13,2017. REINSTALLED AIRCRAFT DATA TAG WITH 870 SEALANT INCLUDING INSTALLING FASTENERS IN WET WITH 870 SEALANT.