ASN Wikibase Occurrence # 180004
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| Date: | Friday 9 July 2004 |
| Time: | 15:15 |
| Type: |  Robinson R-22 Beta |
| Owner/operator: | Private |
| Registration: | N152SP |
| MSN: | 3257 |
| Year of manufacture: | 2001 |
| Total airframe hrs: | 500 hours |
| Engine model: | Lycoming O-320 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Hampton Roads Executive Airport, Norfolk, Virginia -
 United States of America
|
| Phase: | Landing |
| Nature: | Test |
| Departure airport: | Norfolk, VA (PVG) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The commercial pilot/mechanic took off after performing maintenance on the helicopter. He performed four 90-degree pedal turns, during which he experienced no anomalies. He then climbed the helicopter to 500 feet and started to enter a left turn while lowering the collective. He lowered the nose to gain airspeed, and then entered a simulated autorotation. As the pilot pulled in collective, the helicopter continued to descend, and the collective appeared to be ineffective. With the collective in the full up position, the helicopter continued to sink, and impacted the ground. The helicopter bounced, then rolled over into a ditch. Examination of the helicopter by a Federal Aviation Administration (FAA) inspector revealed that the left collective torque tube was fractured at its welded attachment point to the base. Examination of the weld revealed rust on the fracture surface; however, further examination of the fracture surfaces revealed an overstress fracture. Additionally, an examination of the left collective torque tube revealed it interfered with the left seat and could not be extended to the full up position; however, no previous anomalies were reported with the collective movement prior to the accident flight. No mechanical deficiencies were observed with the belts, and no belt slippage was observed.
Probable Cause: The pilot's failure to complete an autorotation due to the restrictive movement of the collective control.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20040730X01114&key=1
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=152SP
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 29-Sep-2015 13:51 | Noro | Added |
| 28-Sep-2016 21:01 | Dr.John Smith | Updated [Time, Operator, Other fatalities, Location, Departure airport, Destination airport, Source, Narrative] |
| 28-Sep-2016 21:03 | Dr.John Smith | Updated [Narrative] |
| 28-Sep-2016 21:03 | Dr.John Smith | Updated [Aircraft type] |
| 21-Dec-2016 19:30 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 07-Dec-2017 18:14 | ASN Update Bot | Updated [Operator, Nature, Departure airport, Destination airport, Source, Narrative] |
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