As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) PROPELLER CONSTANT SPEED UNIT (CSU) CONTROL SHAFT AND COVER LEAKING OIL - THE CSU WAS RETURNED TO THE OVERHAUL FACILITY WHEREIT WAS DISMANTLED - INSPECTION OF THE COVER BORE FOUND IT OVERSIZE BY 0.0762MM (0.003IN) - INSPECTION FOUND 22 OTHER COVERS IN STOCK TO BE ALSO OVERSIZE - MANUFACTURING ERROR/QUALITY CONTROL PROBLEM