ASN Wikibase Occurrence # 294490
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| Date: | Friday 17 September 2004 |
| Time: | 14:45 LT |
| Type: |  Robinson R22 Beta |
| Owner/operator: | Hawaii Pacific Aviation |
| Registration: | N22XM |
| MSN: | 3077 |
| Year of manufacture: | 2000 |
| Engine model: | Lycoming O-360-J2A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Kona-Keahole Airport, Hawaii, HI -
 United States of America
|
| Phase: | Unknown |
| Nature: | Training |
| Departure airport: | Kona-Keahole Airport, HI (KOA/PHKO) |
| Kona-Keahole Airport, HI (KOA/PHKO) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter experienced a hard landing, resulting in the main rotor blades severing the tail boom. While the certified flight instructor (CFI) and student pilot were executing a practice autorotation, the main rotor low revolutions per minute horn began to sound. He also realized that the airspeed had decreased 10 knots below the minimum speed for autorotations. The CFI lowered the collective while pushing the carburetor heat control knob in the "off" position. As the CFI leaned forward to assess the knob position, he felt the helicopter begin to settle. With the ground approaching quickly, he configured the helicopter it in a level attitude, fearing that if he flared, the tail boom would contact the surface first. The helicopter hit the surface hard and the main rotor severed the tail boom. The CFI stated that he did not know of any mechanical malfunctions or failures with the helicopter prior to impact.
Probable Cause: the CFI's failure to maintain an adequate airspeed and main rotor rpm, and his improper flare, which resulted in a hard landing. A factor in the accident was the CFI's diverted attention.
Accident investigation:
 |
|
Sources:
NTSB LAX04CA321
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Oct-2022 18:47 | ASN Update Bot | Added |
| 10-Jun-2023 10:07 | Ron Averes | Updated |
Corrections or additions? ... Edit this accident description
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