As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOWER SKIN OF FUSELAGE ABOVE VENTRAL FUEL TANK HAS POSSIBLE CORROSION- REMOVED CORROSION FROM BELLY EXTERIOR AT FUSELAGE DRAIN BETWEEN FR 53-54, STR 21L & 21R & REMOVED THE DRAIN MOUNTING PLATE, AWAITING ULTRASOUND SKIN THICKNESS MEASUREMENT. DAMAGE TO BE ALLOWER A1 IS PER ETD 2019-145-164595 PERFORMED UNTRASOUND AND REMAINING THICKNESS US 0.123". REPAIRED LOWER SKIN FUSELAGE ABOVE VENTRAL TANK.