What was found
THE PILOT, SIC, REPORTED THAT WHILE CLIMBING OUT OF FL320 TO FL360, HE HEARD A LOUD BANG. THE SIC STATED THAT HE LOOKED OVER HIS SHOULDER TO THE CABIN & THE PAX ADVISED THAT THE NR 3 LT CABIN WINDOW HAD CRACKED. THE SIC ADVISED THE PIC OF THE EVENT. THE PIC DONNED HIS O2 MASK & ASKED THE SIC TO INVESTIGATE. THE SIC INDICATED THAT HE COULD SEE THE OUTER PANE OF THE NR 3 LT WINDOW WAS CRACKED ACROSS THE WINDOW, FRAME TO FRAME. THE CREW DISCUSSED BRIEFLY & DECIDED TO RETURN TO THE DEPARTING AIRPORT. THE PAXS WERE ADVISED & WERE GIVEN INSTRUCTIONS, THE CREW CONTACTED CTR & ASKED FOR RETURN INSTRUCTIONS & DESCENT TO 10,000 FT. THE CREW WAS REQUIRED TO BURN OFF EXTRA FUEL TO PREVENT AN OVERWEIGHT LANDING. INSPECTION OF THE ACFT AFTER SHUTDOWN FOUND A LARGE SECTION OF THE NR 3 LT CABIN WINDOW OUTER PANE MISSING. THIS WINDOW WAS ORIGINAL TO THE AIRCRAFT. HE NR 3 LT WINDOW ALONG WITH 4 OTHER ORIGINAL WINDOWS WERE REPLACED AS A PRECAUTION.