What was found
DURING CRUISE, CREW HEARD A POP AND THEN NOTICED CO-PILOT FORWARD SIDE WINDOW WAS CRACKED IN MULTIPLE DIRECTIONS. CHECKLIST FOLLOWED, EMERGENCY DECLARED, EMERGENCY DESCENT PERFORMED, AND UNEVENTFUL LANDING PERFORMED. MAINTENANCE REMOVED AND REPLACED CO-PILOT FORWARD SIDE WINDOW, P/N OFF NP139722-6 S/N OFF 01117H6624.