What was found
AIRCRAFT WAS GROUNDED, OBSERVED CAPTAIN`S WINDOW ARCING LOWER RT, FOLLOWED BY OUTER PANE CRACK. TRIED TO ACCOMPLISH CB PULL BUT WINDOW CRACKED QUICKLY. MAINTENANCE R & R CAPTAIN`S WINDSHIELD ASSY IAW AMM 56-11-11-0401. R & R NR 1 WINDOW HEAT COMPUTER I IAW AMM 30-42-34-401. OPS TEST GOOD, WINDSHIELD ANTI-ICING AND DEFOGGING.