As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TOOLING MARKS WERE FOUND AT THE AIRPHONE ANTENNA SKIN AT FS 1515 BETWEEN S-28R AND S-29R. THE ANTENNA IS NO LONGER IN USE. BECAUSE THE ANTENNA HAD BEEN SUBJECT TO AN STC, THE ANTENNA WAS REMOVED, AND THE FASTENER PATTERN CUTOUT. AN EXTERNAL REPAIR DOUBLER WAS INSTALLED. CUTOUT WAS 8.6" BY 5.2".