ASN Wikibase Occurrence # 202190
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| Date: | Friday 30 April 1999 |
| Time: | 09:17 LT |
| Type: |  Schweizer 269C-1 |
| Owner/operator: | Helicopter Adventures Inc. |
| Registration: | N6148V |
| MSN: | 0086 |
| Year of manufacture: | 1998 |
| Total airframe hrs: | 456 hours |
| Engine model: | Lycoming HO-360-C1A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Concord, CA -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | (KCCR) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight instructor and student were practicing straight-in autorotations with power recoveries. During the first four autorotations, the student was the primary manipulator of the controls. The student was initiating the flare too high and so the instructor told the student that they would do the next approach together with both of them on the controls. During the flare portion of the ensuing autorotation, the stinger struck the runway surface. The tail rotor then contacted the surface and the helicopter yawed 360 degrees to the right and came to rest approximately 100 feet where the tail rotor struck the runway. The main rotor severed the tail boom. The instructor reported that he believed that the student misinterpreted his instructions to mean that he (the instructor) would be making the primary control inputs, whereas, he had intended for the student to make control inputs to initiate the flare. He planned just to follow through on the controls to guide the student to flare a little lower than on the previous attempts. The flight instructor stated that the accident could have been prevented through 'better communication between student and instructor as to who is responsible for initiating a control input during all phases of flight and especially during critical phases.'
Probable Cause: The inadequate supervision of the student pilot by the flight instructor during the practice autorotation, which resulted in a delayed flare and the tail rotor contacting the ground. A factor was a misinterpreted communication between the flight instructor and student.
Accident investigation:
 |
|
Sources:
NTSB LAX99LA166
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 26-Nov-2017 12:43 | ASN Update Bot | Added |
| 08-Apr-2024 06:25 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Source, Narrative, Category, Accident report] |
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