As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED NEW SEAL AND WEAR SLEEVE FOR REPAIR LEAK AT INPUT SEAL. NEW SEAL IS LEAKING AGAIN AFTER VERY SHORT TIME IN SERVICE. A COMMON PROBLEM, BUT NOT SO SOON. INSPECTION INTERVAL FOR GEARBOX IS 3,000 HOURS. CHANGING SEAL 10 TIMES NOT DESIRABLE. SEAL IS OF NEW STYLE AND PART NUMBER. SUBMITTER STATED POSSIBLY A NEW MANUFACTURER. ADVISED BHT OF THIS PROBLEM.