As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) OIL WAS NOTED LEAKING FROM TRANSMISSION DURING GROUND RUN. REMOVAL OF THE PAINT REVEALED A CRACK ON THE UPPER CASE STARTING FROM THE SPLIT LINE BETWEEN TWO MOUNTING STUDS AT THE 4:30 POSITION, VIEWED FROM THE TOP. AIRCRAFT WAS GROUNDED, TRANSMISSION REMOVED.