What was found
DURING C-CHECK, FRAME 10 BENEATH CO-PILOT'S DV WINDOW BROKEN. MAINTENANCE REMOVED BROKEN FRAME 10, LOCATED, DRILLED, ALODINED, AND INSTALLED NEW FRAME 10 IAW SRM 51-20-03, 51-40-03 AND CPM 51-14-05. THE ACFT WAS APPROVED FOR RETURN TO SERVICE.