As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PUSHBACK, CREW REPORTS NR 1 ENG STARTED NORMALLY. NR 2 ENG FIRST ATTEMPT HAD 13 PERCENT ROTATION THEN TO ZERO. SECOND ATTEMPT NO ROTATION. CREW CYC D20 C/B, NO HELP. FOUND STARTER DISINTEGRATED. ACP VISUAL INSPECTION AND REPLACED STARTER AND START VALVE. OP CHECKS NORMAL.