As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT, R-1 WINDOW BEGAN ARCING FOLLOWED BY CRACKING OF THE OUTER PANE OF THE R-1 WINDOW. REMOVED R-1 WINDOW AND TAGGED PARTS, INSTALLED R-1 WINDOW PER MM 56-11-11. CHECK FOR CORRECT R-1 TERMINAL AND R-1 WINDOW CONTROL TO BE REPLACED. TERMINAL CK OK. REMOVED AND REPLACED WINDOW HEAT CONTROL.