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| Date: | Sunday 29 April 1990 |
| Time: | 07:10 LT |
| Type: |  Robinson R22 |
| Owner/operator: | Private |
| Registration: | N8560M |
| MSN: | 0476 |
| Year of manufacture: | 1985 |
| Engine model: | Lycoming O-320-B2C |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Mammoth Lakes, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Bishop, CA (B1H) |
| Minden, NV (KMEV) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT ENCOUNTERED A STRONG DOWNDRAFT WHILE CRUISING AT 250 TO 300 FEET AGL. HE LOST CONTROL OF THE HELICOPTER, WAS UNABLE TO ARREST THE DESCENT, AND COLLIDED WITH 7000 MSL TERRAIN.
Probable Cause: PILOT'S ENCOUNTER WITH A STRONG DOWNDRAFT WHILE CRUISING AT AN INADEQUATE ALTITUDE. A CONTRIBUTING FACTOR WAS THE HIGH ALTITUDE WHICH LIMITED AVAILABLE ENGINE POWER FOR RECOVERY.
Accident investigation:
 |
|
Sources:
NTSB LAX90LA157
History of this aircraft
Other occurrences involving this aircraft
| 1 December 2015 | N8560M | N8560M LLC | 0 | 1 mile W of Kenisco Road in South Venice, FL | |
sub |
| Heavy landing | ||||||
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 22-Mar-2024 07:08 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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