On June 15, 1993, a Hughes 369HS (registration N500RT) operated by Magic Helicopters, Inc. was involved in an aviation accident near Orlando, FL. Investigators recorded the probable cause as: The No. 2 bearing failed due to undetermined reasons. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During cruise, an engine experienced a partial loss of power. While descending for a precautionary landing, total power loss occurred. The pilot performed an exaggerated deceleration maneuver due to unsuitable terrain during the autorotative forced landing. Examination found the No. 2 bearing failed for undetermined reasons, allowing impeller contact.
Incident Summary
During cruise flight, the engine experienced a partial loss of power. While descending for a precautionary landing, the engine experienced a total loss of power. The pilot initiated an exaggerated deceleration maneuver due to unsuitable terrain encountered during the autorotative forced landing.
Examination Findings
Examination of the engine revealed that the No. 2 bearing failed due to undetermined reasons. This failure allowed the compressor impeller to contact the compressor shroud. Failed bearing material was found on both magnetic plugs located in the gearbox. There was no evidence of oil starvation to the bearing, and it was noted that the bearing was manufactured from correct material.
Probable cause
The No. 2 bearing failed due to undetermined reasons.