ASN Wikibase Occurrence # 134782
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| Date: | Monday 6 June 2005 |
| Time: | 18:00 |
| Type: |  Hughes TH-55 |
| Owner/operator: | Private |
| Registration: | N2KX |
| MSN: | 66-18349 |
| Total airframe hrs: | 4848 hours |
| Engine model: | Lycoming HIO-360-B1A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Paintsville, KY -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | Paintsville, KY (3I6) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The purpose of the flight was to perform a cyclic-rigging check, and a rotor-rpm check during autorotation. The pilot and a friend performed a preflight inspection, and neither noted any mechanical deficiencies. The pilot started the helicopter, and performed the run-up checks, to include the magneto check and the rotor-engagement check with the helicopter "light on the skids." The pilot then completed the before takeoff checks, and initiated a takeoff to a hover. As the pilot applied collective pitch and power for takeoff, he felt a few bumps. He was aware of the phenomena of ground resonance, and continued applying collective pitch and power, but the helicopter would not take off. Within seconds, he had no control of the helicopter, as it disintegrated around him. The friend's version of the events leading up to the accident was consistent with the pilot/owner's. According to the witness, "It happened so fast! It started to shake, a blade hit the tailboom, and it shook to pieces." He added that the helicopter never left the ground, and that it rocked side-to-side two or three times before it came apart.
Probable Cause: the pilot's inadvertent encounter with ground resonance which resulted in destruction of the helicopter.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20050619X00810&key=1
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 06-Dec-2017 10:13 | ASN Update Bot | Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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