ASN Wikibase Occurrence # 359107
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| Date: | Wednesday 19 April 1995 |
| Time: | 16:30 LT |
| Type: |  Brantly Helicopter B-2B |
| Owner/operator: | John Macconnell |
| Registration: | N2198U |
| MSN: | 409 |
| Year of manufacture: | 1964 |
| Total airframe hrs: | 963 hours |
| Engine model: | LYCOMING IVO-360-A1A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Winfield, KS -
 United States of America
|
| Phase: | En route |
| Nature: | Ferry/positioning |
| Departure airport: | Strother, KS (KWLD) |
| Cement City, OK (KRLA) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT STATED THE HELICOPTER WAS IN CRUISE FLIGHT AT ABOUT 500 FEET AGL WHEN THE ENGINE RPM '...SUDDENLY AND RAPIDLY INCREASED AS IF THE ENGINE WAS ABRUPTLY UNLOADED...'. THE PILOT SAID HE AUTOROTATED TO A LANDING THAT WAS '...QUITE SMOOTH.' AFTER TOUCHING DOWN THE HELICOPTER SLID AND ROLLED OVER ON ITS RIGHT SIDE. THE PILOT SAID THE TOUCH DOWN FIELD WAS VERY MUDDY. AN EYE WITNESS SAID HE SAW THE HELICOPTER DESCEND VERY RAPIDLY THEN BOUNCE INTO THE AIR. AFTER TOUCHING DOWN A SECOND TIME IT ROLLED OVER ON ITS RIGHT SIDE. THE ON-SCENE INVESTIGATION REVEALED THAT THE HELICOPTER'S OVER-RUNNING CLUTCH HAD FAILED. EXAMINATION OF THE CLUTCH ASSEMBLY REVEALED ITS SPRAGS AND THE INNER AND OUTER RACES WERE WORN BEYOND THE MANUFACTURER'S DESIGN LIMITATIONS. THE WORN PARTS ALLOWED THE CLUTCH TO GO OVER CENTER AND BECOME DISENGAGED.
Probable Cause: The total failure of the rotor drive system clutch assembly due to excessive wear of the clutch assembly. A factor in this accident was the soft ground in the emergency landing area.
Accident investigation:
 |
|
Sources:
NTSB CHI95LA130
History of this aircraft
Other occurrences involving this aircraft
| 18 April 2017 | N2198U | Private | 0 | Benton County near Earl Park, IN | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Mar-2024 07:04 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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