What was found
RED DYE LEAKAGE FROM THE PROP CYLINDER 'DOME' GASKETS. SPECIFICALLY WHERE THE DOWL PINS ARE. HAS BEEN A RECURRING PROBLEM JUST AFTER OVERHAUL. SUBMITTER STATES THIS SHOP HAS SEEN 7 PROPS LEAK AFTER THE OIL-FILL MOD. THESE OVERHAULS WERE PERFORMED BY 4 DIFFERENT PROPELLER REPAIR STATIONS. AFTER RESEAL, 2 OF THE 7 HAVE SHOWN SUBSEQUENT LEAKAGE AND NEED FOR RESEAL. SUGGEST MCCAULEY HAVE AN O-RING INCORPORATED WITH OIL-FILL MOD.