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| Date: | Tuesday 29 May 1990 |
| Time: | 19:00 LT |
| Type: |  Robinson R22 Alpha |
| Owner/operator: | Rolling Hills Aviation, Inc. |
| Registration: | N8557Z |
| MSN: | 0464 |
| Year of manufacture: | 1985 |
| Engine model: | Lycoming O-320-B2C |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Torrance, CA -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | (KTOA) |
| (KTOA) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
ACCORDING TO STATEMENTS FROM BOTH THE INSTRUCTOR AND THE STUDENT, FOUR PRACTICE AUTOROTATIONS HAD ALREADY BEEN PERFORMED WITH POWER RECOVERIES PRIOR TO TOUCH DOWN. THE PILOTS NOTED THAT THE FIFTH AUTOROTATION PROCEEDED NORMALLY UNTIL ABOUT 40 FEET AGL WHEN THROTTLE AND COLLECTIVE WAS ADDED TO BEGIN THE POWER RECOVERY. ACCORDING TO BOTH PILOTS STATEMENTS, THE ENGINE DID NOT RESPOND WHEN THE THROTTLE WAS INCREASED. THE HELICOPTER TOUCHED DOWN HARD, SLID ALONG THE GROUND AND ROLLED OVER ON ITS RIGHT SIDE AFTER THE RIGHT SKID ENCOUNTERED SOFT SOIL. THE ENGINE AND HELICOPTER WERE EXAMINED WITH NO EVIDENCE OF A SYSTEM FAILURE OR MALFUNCTION. THE ENGINE WAS STARTED IN THE HELICOPTER AND RUN FOR 10 MINUTES. DURING THE TEST RUN, THE ENGINE WAS CYCLED THROUGHOUT ITS NORMAL OPERATING RANGE.
Probable Cause: THIS ACCIDENT WAS A DYNAMIC ROLL OVER DUE TO THE RIGHT SKID ENCOUNTERING SOFT SOIL DURING THE FORCED LANDING.
Accident investigation:
 |
|
Sources:
NTSB LAX90LA204
History of this aircraft
Other occurrences involving this aircraft
| 11 February 2002 | N8557Z | Payne Mcbride Cattle Company | 0 | Encino, Texas | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Mar-2024 13:06 | ASN Update Bot | Added |
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