As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK CORROSION FOUND ON EXTERIOR SURFACE OF FORWARD KEEL SKIN AT RT ECS CUTOUT. REMOVED CORROSION AND FOUND TO BE OUT OF LIMITS IAW SRM. REPAIR PREFORMED IAW STS ENGINEERING SOULTIONS EA 12-2011-43. REPAIR PERFORMED BY TECH SERVICES UNDER W/O 17010.