C210 PLT LOST OIL PRESSURE AND OIL QUANTITY AND HAD THE ENG SEIZE. HE MADE A SUCCESSFUL DEAD STICK LNDG. MAINT HAD JUST REPAIRED THE ENG AND LEFT AN OIL LINE LOOSE.

Narrative

THE PLT RPTED LOSS OF ENG PWR; AT WHICH TIME; THE PLT NOTICED THE LOSS OF OIL PRESSURE. AN EMER WAS DECLARED. THE ENG SHUT DOWN BY ITSELF SHORT OF THE ARPT; WHERE THE PLT MADE A SUCCESSFUL ENG OUT LNDG. NO FURTHER DAMAGE TO THE ACFT WAS SUSTAINED AND NO INJURIES TO THE PLT OR PAX WERE SUSTAINED. MY CHIEF INSPECTOR MADE A VISUAL INSPECTION OF THE ENG AFTER THE INCIDENT AND NOTICED A LOOSE B-NUT ON AN OIL PRESSURE LINE BELOW THE #4 CYLINDER AREA. THIS LOCATION APPEARS TO BE THE AREA WHERE THE OIL LEFT THE ENG. ALSO THE #4 CONNECTING ROD WAS FOUND BROKEN WITH DAMAGE TO THE CRANK CASE. THE #1 AND #4 CYLINDERS WERE REPLACED PRIOR TO THIS FLT. THE LOOSE OIL LINE WAS REMOVED AND REINSTALLED DURING THE #4 CYLINDER REPLACEMENT. THE ENG WAS RUN ON THE GND FOR 40 MINS PERFORMING LEAK AND OPERATIONAL CHKS AS WELL AS OTHER CHKS TO THE ACFT. A LEAK WAS NOTICED COMING FROM AN ADJACENT OIL LINE FROM THE LOOSE ONE. THE LEAK WAS CORRECTED AND FURTHER ENG GND RUNS SHOWED NO MORE LEAKS. A FLT TEST WAS NOT PERFORMED DUE TO AN URGENT NEED FOR THE ACFT. AFTER REVIEWING WHAT I DID AS WELL AS WHAT MY INSPECTOR DID; IN PERFORMING THE FINAL CHKS ON THE ACFT BEFORE RELEASING IT FOR FLT; I CAN ONLY THINK THAT A TEST FLT MAY HAVE SHOWN A PROB WHICH COULD HAVE BEEN CORRECTED BEFORE FURTHER FLT. AS WELL AS A SECOND CHK OF THE LINE THAT WAS FOUND TO BE LOOSE WITH A WRENCH WHEN THE LINE THAT WAS FOUND TO BE LOOSE DURING GND RUN-UP WAS TIGHTENED. SUPPLEMENTAL INFO FROM ACN 583377: THE LINE HAD EITHER FAILED OR VIBRATED LOOSE. WORK WAS JUST COMPLETED CHANGING #1 AND #4 CYLINDER. THE OIL LINE WAS REMOVED DURING THE MAINT ON THE ENG; BUT THE TECHNICIAN WAS SURE HE HAD TIGHTENED THE B-NUT. IT IS POSSIBLE THE LINE WAS DAMAGED DURING THE REMOVAL AND INSTALLATION OF #4 CYLINDER. ENG HAD BEEN RUN ON THE GND FOR AT LEAST 40 MINS DOING OTHER CHKS. 1 OIL LEAK HAD BEEN CORRECTED AND NO OTHER LEAKS WERE FOUND.