As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, TRANSMISSION CHIP WARNING WAS NOTICED. PILOT MADE A UNSCHEDUELD LANDING AT NEAREST AIRPORT. MAINTENANCE INSPECTED TRANSMISSION AND A CHIP WAS FOUND. CHIP WAS FOUND TO BE A STAGE A AND WORK WAS COMPLETED IAW ASB EC135-63A-012 FOR RETURN TO SERVICE.