2010-03 · NASA ASRS report 878468
CE750 flight crew discovers right engine oil quantity low and decreasing after level off in cruise at FL370. The engine is shut down and the flight diverts to the nearest suitable airport. Maintenance had recently been preformed to correct this same problem.
[We were on a] ferry [flight] at cruise of FL370. Pilot in Command (Non Flying Pilot) completed cruise checklist and discovered right engine oil quantity was 7.5 quarts low. Crew completed engine oil level low checklist and declared emergency with Center. We then requested a lower altitude and immediate return to ZZZ. Oil level continued to decrease and the oil low caution message illuminated. We elected to perform a precautionary engine shutdown and began an immediate return to ZZZ. As we descended we then queried Center for another alternate field closer than ZZZ. Center advised that ZZZ1 was only 70 miles away; so we the elected to use ZZZ1. Arriving at ZZZ1 we performed a single engine landing to Runway 20. Crash and Rescue was requested and standing by. An uneventful landing was made and the aircraft taxied to the local FBO. Post flight inspection of the right engine oil sight gauge showed no oil and oil coated the underside of the cowl.The best way I see to prevent this again would be to conduct an engine run up and leak check prior to releasing an aircraft for flight; after engine maintenance of this nature is completed.
We declared an emergency and diverted to ZZZ. We completed a single engine landing and taxied to the local FBO with Crash Fire and Rescue following us. Upon post flight inspection; we noted oil all over the right engine nacelle and the oil sight gauge reading at least 8 quarts low. Maintenance had been completed on that engine two days prior; for an oil leak. The preflight inspection was normal; no oil leaks were noted and the oil quantity was at a normal level of 2.5 quarts low. We ran the engine 15 minutes before takeoff and noted no changes in oil level.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.
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