ASN Wikibase Occurrence # 356708
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| Date: | Thursday 12 September 1996 |
| Time: | 09:23 LT |
| Type: | Hiller UH-12E Soloy |
| Owner/operator: | Summit Helicopters, Inc |
| Registration: | N156HA |
| MSN: | HA3056 |
| Total airframe hrs: | 6091 hours |
| Engine model: | Allison 250C20 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Hamburg, AR -
 United States of America
|
| Phase: | En route |
| Nature: | Agricultural |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that he had refueled the helicopter and loaded chemicals at a field location. About 1 minute after takeoff, he heard a 'loud bang,' followed by a vibration. A forced landing was initiated towards a dirt road. However, prior to landing, the helicopter began to 'spin.' Subsequently, the helicopter impacted trees in a 'slight nose low attitude.' An examination of the helicopter revealed that one tail rotor blade was separated approximately 10 inches from the hub. Further examination revealed the ballast weight which is located on the aft portion of the tailboom, partially disconnected. It was secured to the tailboom only by its forward retaining pin. The ground crew reported that the day prior to the accident, they had observed the ballast weight disconnected at its aft attaching point, and informed the pilot. The pilot reinstalled the ballast weight and secured it with the retaining pin. One of the ground crew also reported that 'the pin seemed to lock in place.'
Probable Cause: The loss of tail rotor control as result of a tail rotor blade strike by a partially disconnected ballast weight, due to a disconnected pin. A factor was the lack of suitable terrain for the forced landing.
Accident investigation:
 |
|
Sources:
NTSB FTW96LA385
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Mar-2024 10:04 | ASN Update Bot | Added |
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