ASN Wikibase Occurrence # 39392
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| Date: | Wednesday 30 September 1992 |
| Time: | 15:45 LT |
| Type: |  Robinson R22B |
| Owner/operator: | Helicopter Adventures Inc. |
| Registration: | N8069X |
| MSN: | 1364 |
| Year of manufacture: | 1990 |
| Total airframe hrs: | 2793 hours |
| Engine model: | Lycoming O-320-B2C |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Martinez, California -
 United States of America
|
| Phase: | En route |
| Nature: | Training |
| Departure airport: | Concord, CA (KCCR) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE CERTIFICATED FLIGHT INSTRUCTOR AND A PROSPECTIVE STUDENT DEPARTED FOR A SHORT HELICOPTER DEMONSTRATION FLIGHT IN CLEAR VFR CONDITIONS. THREE MINUTES AFTER DEPARTURE, THE HELICOPTER WAS OVER-FLYING AN URBAN PARK AREA, ABOUT 1 AND 1/2 MILES WEST OF THE DEPARTURE AIRPORT. WITNESSES HEARD POPPING, BANGING, AND THUMPING NOISES. THE ENGINE THEN QUIT RUNNING. THE MAIN ROTOR DEPARTED ITS NORMAL PLANE OF ROTATION WITH SUFFICIENT RPM TO CONTACT THE RIGHT FRONT PORTION OF THE COCKPIT WINDSHIELD AND STRIKE THE RIGHT SEAT PASSENGER. MAIN ROTOR RPM THEN IMMEDIATELY DECAYED AND STOPPED. THE HELICOPTER WAS THEN OBSERVED IN A STEEP NOSE DOWN ANGLE OF DESCENT UNTIL IMPACTING THE GROUND. NO MALFUNCTION OF THE ENGINE, DRIVE TRAIN, OR FLIGHT CONTROLS WAS FOUND.
Probable Cause: AN UNDETERMINED DIVERGENCE OF THE MAIN ROTOR FROM ITS NORMAL PLANE OF ROTATION WHICH RESULTED IN ROTOR CONTACT TO THE FUSELAGE AND PASSENGER.
Accident investigation:
 |
|
Sources:
NTSB LAX92FA410
FAA register: 2. CAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=8069X
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 25-May-2016 14:39 | Dr.John Smith | Updated [Time, Operator, Location, Source, Narrative] |
| 25-May-2016 14:39 | Dr.John Smith | Updated [Narrative] |
| 20-Sep-2016 20:41 | Dr.John Smith | Updated [Departure airport, Source] |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Apr-2024 17:35 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Source, Narrative, Category, Accident report] |
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