ASN Wikibase Occurrence # 133680
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| Date: | Wednesday 22 July 1998 |
| Time: | 15:20 LT |
| Type: |  Robinson R22 BETA |
| Owner/operator: | Xl Helicopters Inc. |
| Registration: | N8350N |
| MSN: | 2704 |
| Year of manufacture: | 1997 |
| Total airframe hrs: | 636 hours |
| Engine model: | Lycoming O-360-J2A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | 1 mile E of Centennial Airport, Englewood, Colorado -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Training |
| Departure airport: | Englewood, CO (APA |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The instructor and his student were practicing 180 degree autorotations, preparing for the student's commercial and flight instructor checkrides. The maneuvers were begun between 610 and 660 feet above the ground. They completed several autorotations without incident. The instructor said the helicopter dipped slightly as airspeed increased by 5 knots to 65-70 knots indicated. Main rotor rpm decreased slightly, so he made an aft cyclic input and lowered collective slightly. Rate of descent suddenly increased rapidly and the instructor decreased bank angle with cyclic, increased power, and raised the collective. He flared to arrest the rate of descent as much as possible and pulled collective to cushion the landing. The instructor said he thought wind shear or a strong downdraft caused the accident.
Probable Cause: An encounter with unanticipated windshear or a downdraft.
Accident investigation:
 |
|
Sources:
NTSB FTW98LA327
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=8350N
History of this aircraft
Other occurrences involving this aircraft
| 9 August 2023 | N798MG | Sevier County Aviation | 0 | Gatlinburg–Pigeon Forge Airport (GKT/KGKT), Sevierville, TN | |
sub |
| Autorotation | ||||||
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 23-Sep-2016 15:08 | Dr.John Smith | Updated [Time, Operator, Location, Phase, Departure airport, Source, Narrative] |
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 06-Apr-2024 18:54 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Phase, Departure airport, Source, Narrative, Category, Accident report] |
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