As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - "C" - DURING C-17 CHECK A CRACK WAS FOUND ON THE F/O'S SLIDING WINDOW FWD POST LOWER CORNER BS 210. MAINTENANCE STOP DRILLED CRACK AND PERFORMED HFEC INSPECTION TO CONFIRM CRACK WAS CONTAINED. FABRICATED DOUBLER AND INSTALLED REPAIR AT BS 210 IAW B737-300 SRM 53-10-01, FIG 203, PG 209-212.