ASN Wikibase Occurrence # 175590
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| Date: | Wednesday 15 April 2015 |
| Time: | 16:00 |
| Type: |  Robinson R44 Raven II |
| Owner/operator: | Private |
| Registration: | N754R |
| MSN: | 11318 |
| Year of manufacture: | 2006 |
| Engine model: | Lycoming IO-540-AE1A5 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Off airport, Dunlap, IL -
 United States of America
|
| Phase: | Landing |
| Nature: | Survey |
| Departure airport: | Kankakee, IL (IKK) |
| Pekin, IL (C15) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The commercial pilot stated he and the passenger were conducting a helicopter flight to observe and count geese at an altitude of 300 ft above the ground at an indicated airspeed of 60 knots. The pilot increased the collective to transition to another area when he noticed an increase in engine rpm and a decrease in rotor rpm along with the illumination of a main rotor warning light. The clutch warning light did not illuminate. The pilot initiated a downwind autorotation to a plowed field. The helicopter tipped forward on its skids, the main rotor contacted the ground, and the helicopter rolled over. Although a postaccident examination of the clutch and V-belts revealed some limited component wear, and some minor anomalies to the best tension actuator were noted, no anomalies were identified with the clutch system that would have resulted in a loss of main rotor rpm.
Probable Cause: A loss of main rotor rpm for reasons that could not be determined during postaccident examinations.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N754R
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Apr-2015 16:28 | Geno | Added |
| 27-Apr-2015 20:51 | Anon. | Updated [Location] |
| 21-Dec-2016 19:30 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 01-Dec-2017 13:01 | ASN Update Bot | Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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