What was found
(CAN) ENGINE WAS CONTAMINATED. ABNORMAL WEAR WAS DETECTED ON FOUR CONNECTING RODS CAUSING METAL CONTAMINATION. DEMARCATION WAS ALSO NOTED ON CRANKSHAFT. AFTER COMPLETING A THOROUGH INSP (MEASUREMENT OF INTERNAL BUSHINGS, A TORSION, PARALLELISM, INSPECTION OF CONNECTING RODS, SIDE PLAY INSP OF CONNECTING RODS AND CRANKSHAFT), CONCLUDED THAT ALL MFG INSP REQUIREMENTS WERE CARRIED OUT IN CONFORMITY WHEN IT WAS OVERHAULED. AC WAS IN OPERATION WITH 100 MINERAL OIL (SUMMER OIL) BECAUSE 80 MINERAL OIL (WINTER OIL) WAS NOT AVAILABLE. WE CONCLUDED THAT USE OF 100 MINERAL OIL IN VERY COLD STARTING CONDITION CAUSED A LACK OF LUBRICATION IN THIS SPECIFIC AREA.