As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER ENGINE OVERHAUL WAS COMPLETED AND ENGINE RETURNED TO FLIGHT STATUS THE POWERSHAFT SEAL BEGAN TO WEEP AND PROGRESSIVELY THE WEEP BECAME A LEAK. A NEW SEAL WAS INSTALLED AND NO FURTHER LEAKAGE WAS NOTED. SUGGEST IMPROVED QUALITY CONTROL FOR THESE SEALS BEFORE INSTALLATION MAY BE REQUIRED. (K)