Turbochargers

During descent, pilot noted oil streaking back from top engine cowl louvers, then dropping oil pressure. Pilot conducted precautionary shutdown and feathered propeller. Pilot continued descent and landed at destination without issue. Maintenance removed cowling and found oil appearing to come from the turbocharger (p/n 4066109025) area. Further investigation revealed oil bypassing the seals on the turbo.

Editorial Staff

Thursday, November 29, 2018 at 12:00 AM ET

Verified

Key Takeaways:

Several aircraft types experienced turbocharger malfunctions, indicating a recurring issue with these components.
Common failure modes include turbocharger seizure, oil leaks from seals or bearings, and cracked bearing flanges.
These failures frequently led to significant operational disruptions such as power loss, reduced engine performance, and emergency landings or precautionary shutdowns.