What was found
(CAN) DURING FLIGHT OIL WAS NOTICED ON THE WINDSCREEN WHILE ON ROUTE. UPON INSPECTION AFTER LANDING, MAINTENANCE FOUND EXCESSIVE OIL ON ENGINE COWLING. PROP WAS REMOVED AND SENT FOR REPAIRS. REPAIR SHOP CHANGED ALL THE INTERNAL SEALS AND RETURNED THE PROP. REPAIRED PROP WAS RE-INSTALLED. AFTER 6 HRS IN OPERATION FLUID WAS NOTICED LEAKING FROM PROP AGAIN ALTHOUGH NOT TO THE DEGREE THAT OCCURRED ON THE FIRST OCCASION. AFTER CLEANING AND GROUND RUNS IT WAS DETERMINED THAT THE PROP WAS LEAKING OIL AGAIN. PROP WAS REMOVED AND SENT FOR REPAIR AGAIN. REPAIR SHOP FINDINGS HAVE YET TO BE DETERMINED. (TC NR 20070209004)