As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THIS WINDOW RETAINER WAS PRE-DRILLED WITH PILOT HOLES. THE HOLES ON THE RETAINER DID NOT MATCH UP WITH THE EXITING HOLES ON THE AIR FRAME. THERE IS NO WAY TO PROPERLY DRILL THE NEW FRAME AND STILL HAVE CLEAN ROUND HOLES WITH PROPER EDGE DISTANCE.