As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE ACCOMPLISHMENT OF THE 2KU INSTALLATION PER GOGO DWG D18470-22207 REV C, AND AMDS WORKCARD 2330-01349-01D, MAINTENANCE ENCOUNTERED AN EXISTING HOLE (0.159 DIA) AT FS 580 AND S1-2R FOR AN INSULATION BLANKET RETAINING CLIP THAT WILL FALL UNDERNEATH THE INTERCOSTAL BRACKET. ONCE THE PILOT HOLE WAS DRILLED THE CENTER TO CENTER DISTANCE OF THE TWO HOLES IS 0.400. C/W ERA 563975-14.