ASN Wikibase Occurrence # 354972
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| Date: | Friday 5 December 1997 |
| Time: | 12:20 LT |
| Type: |  Bell 206B |
| Owner/operator: | State Of Alaska |
| Registration: | N83146 |
| MSN: | 1034 |
| Year of manufacture: | 1973 |
| Total airframe hrs: | 12638 hours |
| Engine model: | Allison 250-C20 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Anchorage, AK -
 United States of America
|
| Phase: | Landing |
| Nature: | Unknown |
| Departure airport: | , AK (KMRI) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Two commercial pilots were practicing touchdown autorotation landings at a private snow covered airstrip. The purpose of the flight was for both pilots to maintain their proficiency. The first pilot had performed several straight-in touchdown autorotations. During the last autorotation, the first pilot entered the autorotation at 800 feet above the ground and about 80 knots. During the descent, the pilot maintained a 65 knot airspeed, and began a deceleration flare about 50 to 60 feet above the ground. As the ground speed dissipated, the pilot leveled the helicopter, applied main rotor collective pitch, and touched down with about a 30 foot ground run. As the helicopter slowed to a stop, the pilot indicated the helicopter shuddered several times. The main rotor blades struck the tail boom, severing the horizontal and vertical stabilizer, and the tail rotor assembly, from the tail boom.
Probable Cause: The pilot's failure to maintain adequate rotor RPM during an autorotation landing.
Accident investigation:
 |
|
Sources:
NTSB ANC98TA011
History of this aircraft
Other occurrences involving this aircraft
| 1 May 2009 | TI-BBT | private | 2 | Cerro de la Muerte |  |
w/o |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Mar-2024 06:38 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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