As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED NEW SEAL AFTER OVERHAUL OF UNIT. STARTED LEAKING OIL AFTER VERY SHORT TIME IN SERVICE. NOT REALLY A COMMON PROBLEM. SUBMITTER STATED BELL SEEMS TO HAVE CHANGED MANUFACTURERS. SEAL IS BLACK INSTEAD OF USUAL ORANGE COLOR AND IS GARLOCK TYPE. SOMETHING SEEMS UNUSUAL ABOUT THE LIP, BUT CANNOT BE CONFIRMED AT THIS TIME. NOTIFIED BHT OF THIS PROBLEM. AWAITING ADVICE.