ASN Wikibase Occurrence # 296595
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| Date: | Monday 23 September 2002 |
| Time: | 09:00 LT |
| Type: |  Robinson R22B |
| Owner/operator: | Helistream, Inc. |
| Registration: | N2331 |
| MSN: | 2145 |
| Year of manufacture: | 1992 |
| Total airframe hrs: | 3788 hours |
| Engine model: | Lycoming O-320-B2C |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Silverado, California -
 United States of America
|
| Phase: | Unknown |
| Nature: | Training |
| Departure airport: | Santa Ana-John Wayne International Airport, CA (SNA/KSNA) |
| Santa Ana-John Wayne International Airport, CA (SNA/KSNA) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During an instructional flight, a forced landing occurred on slopping terrain wherein the main rotor blades contacted the hillside and the tail boom was bent. The certified flight instructor (CFI) and student were operating the helicopter near its maximum certificated gross weight over a 2,900-foot mean sea level hillside, with a density altitude higher than 5,800 feet. The CFI failed to adequately monitor his student's handling of the controls, and the main rotor rpm decreased. Despite the CFI's subsequent efforts at regaining adequate rpm, the low rotor rpm condition continued, which necessitated a forced landing.
Probable Cause: The student's failure to maintain adequate main rotor rpm, and the flight instructor's inadequate supervision of the flight. Contributing factors were the hilly terrain and the relative high density altitude conditions.
Accident investigation:
 |
|
Sources:
NTSB LAX02LA294
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Oct-2022 08:28 | ASN Update Bot | Added |
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