What was found
INSPECTION FOLLOWING ENGINE REMOVAL REVEALED EXTREME CHAFING/WEAR DAMAGE TO PROP GOVERNOR EXTERNAL OIL LINE AT GOV. END APPROX 5 INCHES AWAY FROM B-NUT ATTACH. DAMAGED AREA APPROX .25 INCH BY .50 INCH & WEAR WAS NEARLY THROUGH TUBE WALL THICKNESS. OIL LOSS WAS IMMINENT. AD NOTE 90-04-06 WAS ACCOMPLISHED 678 HRS PREVIOUSLY. ACFT ANNUALED 5 TIMES SINCE. AD LYC REQUIRED CLAMPING WAS PRESENT AND INTACT. ENGINE MOUNT TUBE DAMAGED REQUIRING WELD REPAIR. EXTREME WEAR PRESENT INDICATES PARTS HAD BEEN IN CONSTANT CONTACT AS OPPOSED TO START-UP/SHUTDOWN MOTION.