ASN Wikibase Occurrence # 367009
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| Date: | Wednesday 9 May 1990 |
| Time: | 14:50 LT |
| Type: |  Robinson R22 |
| Owner/operator: | Helistream, Inc. |
| Registration: | N9070N |
| MSN: | 0186 |
| Year of manufacture: | 1981 |
| Engine model: | LYCOMING O-320-B2C |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Irvine, CA -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | Santa Ana, CA (KSNA) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING AN INSTRUCTIONAL LESSON THE CFI DEMONSTRATED AUTOROTATION TO HIS STUDENT. THE CFI INDICATED THAT HE PLANNED TO LAND IN AN ESTABLISHED LANDING ZONE. HOWEVER, UPON RECOGNIZING THE HELICOPTER WOULD NOT REACH THE DESIRED LOCATION THE CFI DECIDED TO STOP THE DESCENT. THE CFI FURTHER REPORTED THAT HE RAISED THE COLLECTIVE WHICH INDUCED A LOW ROTOR RPM SITUATION. THERE WAS INSUFFICIENT ALTITUDE TO RECOVER AND THE HELICOPTER TOUCHED DOWN HARD.
Probable Cause: THE CFI'S FAILURE TO MAINTAIN ROTOR RPM DURING THE PRACTICE AUTOROTATION.
Accident investigation:
 |
|
Sources:
NTSB LAX90LA168
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 22-Mar-2024 06:36 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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