ASN Wikibase Occurrence # 290442
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| Date: | Friday 1 August 2014 |
| Time: | 14:15 LT |
| Type: |  Mosquito Aviation XE |
| Owner/operator: | |
| Registration: | CF-HEZ |
| MSN: | 1004 |
| Year of manufacture: | 2002 |
| Total airframe hrs: | 251 hours |
| Engine model: | Inntec Inntec 800 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Oshkosh, Wisconsin -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Oshkosh-Wittman Field, WI (OSH/KOSH) |
| Oshkosh-Wittman Field, WI (OSH/KOSH) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Just after takeoff, the experimental, amateur-built helicopter started to rotate and then impacted the ground in a level attitude, which resulted in substantial damage to the helicopter. Examination revealed that one tail rotor blade had separated from the tail rotor and gearbox assembly and that the blade had separated cleanly from the assembly; neither the collar nor the pins used to secure the blade were located. The pilot reported that he had been testing this tail rotor design for 4 years. A tension/torsion strap and two steel pins were used to retain the blade. The strap was not completely restricted from movement, and, over time, movement and wear resulted in the failure of the retaining assembly. The tail rotor assembly was a unique design and was not used in any other application.
Probable Cause: The failure of the retaining assembly on the tail rotor blade, which resulted in the separation of the blade and the subsequent loss of helicopter control.
Accident investigation:
 |
|
Sources:
NTSB CEN14LA401
History of this aircraft
Other occurrences involving this aircraft
| 15 July 2018 | C-FHEZ | Private | 1 | Highwood River, AB |  |
w/o |
| Collision with pole or wires | ||||||
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 06-Oct-2022 15:11 | ASN Update Bot | Added |
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