ASN Wikibase Occurrence # 37436
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| Date: | Friday 24 September 1993 |
| Time: | 15:54 LT |
| Type: |  Robinson R22 Beta |
| Owner/operator: | U.s. Air School |
| Registration: | N40049 |
| MSN: | 1462 |
| Year of manufacture: | 1990 |
| Total airframe hrs: | 1765 hours |
| Engine model: | Lycoming O-235-B2C |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Wildomar, California -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | La Verne, CA (KPOC) |
| Murrieta, CA (F70) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WITNESSES HEARD TWO BANG NOISES FOLLOWED BY THE HELICOPTER SHEDDING DEBRIS. THE HELICOPTER THEN BEGAN TO SPIN TO THE RIGHT, AND DESCENDED UNCONTROLLED UNTIL COLLIDING WITH THE GROUND. THE TAIL ROTOR GEAR BOX, TAIL ROTOR BLADES, AND VERTICAL AND HORIZONTAL STABILIZER SEPARATED BEFORE THE HELICOPTER IMPACTED THE GROUND. THE LEFT DOOR OF THE HELICOPTER WAS REMOVED FOR THE FLIGHT. AN ALUMINUM KNEE BOARD, BELONGING TO THE PILOT, WAS FOUND OUTSIDE THE HELICOPTER NEAR ONE OF THE TAIL ROTOR BLADES. IT EXHIBITED IMPACT DAMAGE AND PAINT TRANSFER CONSISTENT WITH THE COLOR OF THE TAIL ROTOR BLADES. THE TIP OF ONE OF THE TAIL ROTOR BLADES EXHIBITED DAMAGE ON THE LEADING EDGE CONSISTENT WITH STRIKING A METALLIC OBJECT.
Probable Cause: THE FAILURE OF THE TAIL ROTOR BLADE AFTER BEING STRUCK BY THE PILOT'S KNEE BOARD, AND THE FAILURE OF THE PILOT TO ADEQUATELY SECURE THE KNEE BOARD WHILE IN FLIGHT.
Accident investigation:
 |
|
Sources:
NTSB LAX93FA369
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=40049
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 05-Sep-2016 00:54 | Dr.John Smith | Updated [Time, Operator, Location, Nature, Departure airport, Destination airport, Source, Narrative] |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Apr-2024 11:04 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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