ASN Wikibase Occurrence # 138927
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: | Saturday 1 October 2011 |
| Time: | 12:55 |
| Type: |  Robinson R66 |
| Owner/operator: | Private |
| Registration: | N266CY |
| MSN: | 0010 |
| Year of manufacture: | 2011 |
| Total airframe hrs: | 120 hours |
| Engine model: | Rolls Royce RR300 |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | ca 1 mile S of Philip, SD -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Gillette, WY (GCC) |
| Winner, SD (ICR) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter was on a cross-country flight when it experienced a separation of the main rotor mast 8 inches below the teeter bolt, and the main rotor blade assembly separated from the flying helicopter. Subsequently, the helicopter impacted terrain and a postimpact fire ensued. Examination of the mast revealed fracture features consistent with overload failure and mechanical damage indicative of mast bumping. An examination of the airframe, engine, and remaining systems revealed no preimpact anomalies. The reason for the mast bumping event could not be determined due to the amount of thermal damage to the wreckage.
Probable Cause: The in-flight separation of the main rotor mast following a mast bumping event. The reason for the mast bumping event could not be determined due to postaccident damage.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=266CY
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 03-Oct-2011 15:33 | RobertMB | Added |
| 03-Oct-2011 15:41 | RobertMB | Updated [Aircraft type, Operator, Narrative] |
| 05-Oct-2011 11:22 | aeronaut | Updated [Source] |
| 12-Oct-2011 02:07 | Anon. | Updated [Source] |
| 17-Oct-2011 23:53 | Geno | Updated [Departure airport, Destination airport, Source, Narrative] |
| 09-Mar-2013 11:58 | TB | Updated [Time, Aircraft type, Operator, Location, Departure airport, Destination airport, Source, Narrative] |
| 09-Mar-2013 12:00 | TB | Updated [Source] |
| 26-Feb-2016 20:22 | Dr.John Smith | Updated [Time, Location, Departure airport, Destination airport, Source, Narrative] |
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 19-Aug-2017 12:20 | Aerossurance | Updated [Time, Location, Source] |
| 27-Nov-2017 17:19 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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