Part 21 Report - 1999-220

THE LICENSEE REPORTED A PART 21 DEFECT ON A REPLACEMENT TURBOCHARGER SUPPLIED BY COLTEC INDUSTRIES.

THE LICENSEE REPLACED A TURBOCHARGER(MODEL 730), SUPPLIED BY COLTEC INDUSTRIES, ON THEIR "B" EMERGENCY DIESEL GENERATOR (ALCO MODEL 16-251F) AT GINNA STATION. IT WAS DETERMINED THAT THERE WAS A MANUFACTURING DEFICIENCY IN THE REPLACEMENT TURBOCHARGER WHICH CONSISTED OF A MISSING DRAIN PORT IN THE INTERMEDIATE CASING ON THE TURBINE END WHICH WOULD PREVENT ENGINE LUBRICATING OIL FROM BEING ABLE TO DRAIN BACK TO THE ENGINE SUMP FROM THE TURBOCHARGER SHAFT AND BEARINGS. THIS DEFICIENCY CREATED A CONDITION WHERE ENGINE LUBE OIL WAS BEING DIRECTED INTO THE CYLINDERS THROUGH THE EXHAUST MANIFOLD PIPING, WHICH COULD HAVE RESULTED IN SERIOUS ENGINE DAMAGE.