Cracks in the windshield of a Cessna 525B Citation CJ3 led to an investigation of the frame behind it.

The holes in the left-hand windshield frame were misplaced, and that was what had been cracking the glass. Reaming them out to the next nominal size would not have brought them true, so replacing the frame structure was the only way to fix the cause rather than the symptom.

The windshield frame structure was removed and replaced.