As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE IN CRUISE FLIGHT AT FL310 AND OAT -50 DEGREES C, FLIGHT CREW OBSERVED RT WINDSHIELD OUTER PANE CRACK DEVELOP. CRACK WAS DIAGONAL IN LOWER INBOARD CORNER (APPROXIMATELY 6 INCHES). POH ABNORMAL CHECKLIST FOLLOWED AND FLIGHT RETURNED TO POINT OF DEPARTURE.