ASN Wikibase Occurrence # 365695
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| Date: | Sunday 10 February 1991 |
| Time: | 16:20 LT |
| Type: |  Robinson R22A |
| Owner/operator: | Watson Helicopters Inc. |
| Registration: | N8491A |
| MSN: | 0404 |
| Year of manufacture: | 1984 |
| Total airframe hrs: | 6154 hours |
| Engine model: | LYCOMING O-320-B2C |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Piru, CA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Training |
| Departure airport: | Pacoima, CA (KWHP) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE CFI WAS DEMONSTRATING A 180 DEGREE AUTOROTATION TO HIS STUDENT IN A 25 KT WIND. THE CFI ALLOWED THE MAIN ROTOR RPM TO BLEED OFF AND WAS UNABLE TO RECOVER THE RPM BEFORE TOUCHDOWN. THE HELICOPTER LANDED HARD AND THE MAIN ROTOR SEVERED THE TAILBOOM. THE HELICOPTER THEN ROLLED OVER.
Probable Cause: FAILURE OF THE CFI TO MAINTAIN MAIN ROTOR RPM DURING A DEMONSTRATED AUTOROTATION.
Accident investigation:
 |
|
Sources:
NTSB LAX91LA097
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Mar-2024 12:53 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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