As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING GROUND RUN #2 ENG ( REF ASA NR-0001 W/O 1931439) FOUND OIL LEAKING EXCESSIVELY FROM #2 IDG DRAIN PAD VENT. GROUNDED - YES. REMOVED AND REPLACED #2 ENGINE IDG REF B737-900 AMM 24-11-11/401. LEAKS CHECK GOOD AND OPS TEST GOOD. ETOPS SIGNIFICANT GROUND VERIFICATION SUCCESSFUL.