ASN Wikibase Occurrence # 212161
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| Date: | Tuesday 5 June 2018 |
| Time: | 12:45 LT |
| Type: |  Bell 206B JetRanger |
| Owner/operator: | Due North Aviation LLC |
| Registration: | N518Z |
| MSN: | 3991 |
| Year of manufacture: | 1987 |
| Total airframe hrs: | 16479 hours |
| Engine model: | Rolls-Royce 250-C20 SER |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Sanders, KY -
 United States of America
|
| Phase: | En route |
| Nature: | Survey |
| Departure airport: | Madison Municipal Airport, IN (MDN/KIMS) |
| Mount Orab, OH (OA10) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot and observer were conducting a powerline patrol flight in the helicopter. About 40 minutes into the flight, while flying at 35 to 40 knots about 120 ft above ground level, the pilot heard the main rotor losing speed; the low rotor rpm light subsequently illuminated, and the associated aural warning sounded. The pilot entered an autorotation, during which he raised the collective to avoid impacting a set of power transmission lines. The pilot reported that the rotor speed remaining upon reaching the touchdown point was insufficient to cushion the landing, and the helicopter landed hard, resulting in substantial damage. After landing, the pilot noted that the engine was still partially producing power, and he shut it down using the throttle.
Examination of the airframe and engine revealed no mechanical malfunctions or component failures that would have precluded normal operation. Based on the available information, the reason for the loss of engine power could not be determined.
Probable Cause: A partial loss of engine power for undetermined reasons, and a loss of main rotor rpm during the subsequent autorotation, which resulted in a hard landing.
Accident investigation:
 |
|
Sources:
NTSB WPR18LA164
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Jun-2018 19:55 | Aerossurance | Added |
| 09-Jul-2022 06:24 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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