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