As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING #2 ENG IDLE RUN, LOUD WHINING NOISE WAS HEARD FROM STARTER. AFTER STARTER CUTOUT SOUND WENT AWAY. GROUNDED - YES. PERFORMED VISUAL INSPECTION OF STARTER & FOUND STARTER FAN BLADE DAMAGED. REMOVED & REPLACED #2 ENG STARTER REF B737-9 AMM 80-11-01. LEAK & OPS CHECKED GOOD.