ASN Wikibase Occurrence # 176391
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| Date: | Wednesday 14 April 2004 |
| Time: | 09:30 |
| Type: |  Robinson R22 |
| Owner/operator: | Universal Helicopters Inc. |
| Registration: | N555UH |
| MSN: | 3550 |
| Year of manufacture: | 2003 |
| Total airframe hrs: | 170 hours |
| Engine model: | Lycoming O-360-J2A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Nephi, Juab County, Utah -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | Provo Municipal, UT (PVU) |
| Nephi, UT | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight instructor said, while practicing 180 degree autorotations, and "at approximately 150 feet agl, [the] descent rate increase[d] dramatically.' The flight instructor stated that he attempted to recover and flare with aft cyclic and down collective. He then added full throttle and raised the collective, in an attempt to land in a "skid level attitude." The helicopter, however, struck the ground hard, collapsing both skids and allowing the main rotor blade to sever the tail boom. The helicopter rotated "three or four times" before coming to rest off of the left side of the runway. An examination of the helicopters systems revealed no anomalies.
Probable Cause: the flight instructor's failure to maintain control of the helicopter resulting in a hard landing.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20040504X00554&key=1
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=555UH
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 26-May-2015 13:54 | Noro | Added |
| 13-Aug-2016 18:46 | Dr.John Smith | Updated [Time, Operator, Other fatalities, Location, Departure airport, Destination airport, Source, Narrative] |
| 28-Sep-2016 18:18 | Dr.John Smith | Updated [Source, Narrative] |
| 21-Dec-2016 19:30 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 07-Dec-2017 17:54 | ASN Update Bot | Updated [Operator, Nature, Departure airport, Destination airport, Source, Narrative] |
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