As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L-1 WINDOW CRACKED AND ARCED AT FL 210 DURRING CLIMB OUT. NO WEATHER AS AN ISSUE. SMOOTH AIR AND CLEAR SKIES. 3-4 CRACKS ALL ON OUTER PANE. REMOVED AND REPLACED L-1 WINDOW IAW AMM 56-11-011-4. WINDOW HEAT TEST CHECKED NORMAL IAW 30-41-033-4 RII 236332 R/C AIRCRAFT OK FOR SERVICE.