As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB/PRESSURIZATION, A POPPING NOISE WAS HEARD FROM LT COCKPIT SIDE WINDOWS. REMOVAL OF THE WINDOWS REVEALED CRACKS FROM SCREW HOLES OUTWARD TO THE EDGE. *NOTE: THE SAME WAS FOUND ON THE RT COCKPIT SIDE WINDOW P/N959.81.10.112 S/N 00061H1871 BOTH WINDOWS REPLACED WITH NEW.