As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FRAME CRACK AND MULTIPLE SKIN CRACKS IN THE LOWER FUSELAGE SKIN AT THE COMMUNICATION ANTENNA WERE DETECTED WHILE IN CHECK. EXTERNAL DOUBLER PART NUMBER 53-0048-401 HAS BEEN INSTALLED PER MAJOR REPAIR ENGINEERING ORDER 19-28-31 "REPAIR OF CRACKS AT FS180 LOWER LH COMM. ANTENNA".