ASN Wikibase Occurrence # 133636
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Thursday 22 May 1997 |
| Time: | 17:10 LT |
| Type: |  Bell 206B |
| Owner/operator: | Patrick E. Perrott |
| Registration: | N61PP |
| MSN: | 1369 |
| Year of manufacture: | 1974 |
| Engine model: | Allison 250-C20 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Winter Park, FL -
 United States of America
|
| Phase: | Unknown |
| Nature: | Unknown |
| Departure airport: | Orlando, FL (KORL) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Witnesses observed the helicopter hovering out of ground effect with a tailwind. The nose of the helicopter pitched nose high and the helicopter started to hover backwards. The nose yawed right and back to the left, and then started spinning to the right descending with the nose pitching up and down before the helicopter disappeared from view behind a tree line. Examination of the helicopter revealed no evidence of a precrash mechanical failure or malfunction of the airframe, flight controls, engine assembly or accessories. Review of the pilots logbook revealed he had not flown the helicopter in six months. The pilot stated he had not received any instruction in the loss of tailrotor effectiveness or uncommanded left or right yaw. He was not aware of the conditions required for this phenomenon to occur or what corrective action should be taken. Review of the flight manual revealed no written procedures pertaining to loss of tailrotor effectiveness or unanticipated right yaw.
Probable Cause: The pilots improper in-flight planning/decision to conduct an out of ground effect hover with a tailwind resulting in an in-flight loss of directional control due to loss of tailrotor effectiveness/unanticipated right yaw, and subsequent in-flight collision with a tree and terrain. Contributing to the accident was the manufactures inadequate written procedures in the flight manual, and the pilot's inadequate training pertaining to the loss of tailrotor effectiveness/unanticipated right yaw.
Accident investigation:
 |
|
Sources:
NTSB MIA97FA172
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 08-Apr-2024 15:19 | ASN Update Bot | Updated [Time, Other fatalities, Departure airport, Source, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation