As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN DTW FOR SCHEDULED MOD, DAL MTC IS ACCOMPLISHING REMOVAL OF THE AFT ATG ANTENNA PER GOGO DWG P19112-24406, REV C. UPON REMOVAL OF THE DOUBLER, MTC REPORTED MULTIPLE EXISTING HOLES WERE FOUND TO BE ELONGATED. MAINTENANCE REPAIRED PER ERA 551111-14.