As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPPER FUSELAGE SKIN CRACKED AT COMM ANTENNA MOUNTING BASE LOCATED AT STATION 210, FIVE INCHES LEFT OF AIRCRAFT CENTERLINE. ANTENNA INSTALLATION WAS ORIGINAL FROM AIRCRAFT MANUFACTURE. CRACK ATTRIBUTED TO INSUFFICIENT METAL THICKNESS TO BOTH OUTER SKIN OF .025 AND MOUNTING DOUBLER OF .032.