Thrush S2R-H80 N6216K
28 September 2020 · Donalsonville, Georgia, United States · No injuries
Summary
On 28 September 2020 at about 20:30 local time, a Thrush S2R-H80 registered N6216K, operated by Custom Ag and Air Inc., was involved in an incident near Donalsonville, Georgia, United States. One person was on board and nobody was injured. The aircraft was slightly damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 20:30
- Classification
- Incident
- Location
- Donalsonville, Georgia, United States
- Coordinates
- 31.0368, -84.8800
- Aircraft
- Thrush S2R-H80
- Registration
- N6216K
- Category
- Airplane
- Year built
- 2016
- Engines
- 1
- Operator
- Custom Ag and Air Inc.
- Operating rule
- Part 137: Agricultural
- Purpose of flight
- Aerial Application
- Phase of flight
- Not recorded
- Route
- Donalsonville → Unknown
- Aircraft damage
- Minor
- Weather
- VMC
- Light
- Day
- NTSB number
- ENG20LA046
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 1 |
Probable cause
A total loss of engine power due to a loose torque meter attachment nut in the reduction gearbox that jammed the planetary gearset causing the power turbine shaft to separate from the power turbine disk, resulting in the power turbine overspeeding and shedding blades that penetrated the compressor turbine case.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
The incident engine suffered a release of low-energy power turbine blade debris due to a power turbine overspeed event. One or more hex nuts that secure the torque meter support within the reduction gearbox came loose and backed off from its threaded stud. A loose nut then became wedged between the mating teeth of the stage 2 planetary gears and crown wheel and the sudden torque shock caused teeth to fracture on one stage 1 planetary gear. Once these teeth fractured, mis-meshing between the stage 1 planetary gears and the sun gear occurred resulting in the 360° fracture and liberation of the sun gear teeth. The reduction gearbox then became decoupled from the power turbine, allowing for overspeed to occur
Quoted verbatim from the NTSB record.
Other Thrush S2R accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 3 Sep 2020 | Thrush S2R-H80 | Hawkinsville, Georgia, United States | Dawson Brothers Spraying Service Inc | Serious injuries | - |
| 17 Apr 2021 | Thrush S2R-T660 | Hermiston, Oregon, United States | K2 Aerial Application LLC | No injuries | - |
| 19 Oct 2022 | Thrush S2R-T660 | Sierra Segundera, Spain | - | Fatal | 1 |
| 31 May 2018 | Thrush S2R-H80 | Parkin, Arkansas, United States | Air Aids Inc | No injuries | - |
| 12 May 2022 | Thrush S2R-H80 | Aurora, Missouri, United States | Kingsley Kiman J | Minor injuries | - |
| 5 May 2022 | Thrush S2R | Hawkinsville, Georgia, United States | - | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 3 May 2020 | Mooney M20K | Athens, Georgia, United States | - | No injuries | - |
| 27 Jun 2020 | Ayres S2R | Perry, Georgia, United States | - | No injuries | - |
| 5 Oct 2020 | Champion 8KCAB | Ellijay, Georgia, United States | - | Minor injuries | - |
| 9 May 2020 | Cessna 402 | Hampton, Georgia, United States | Handel International, LLC | Minor injuries | - |
| 25 Oct 2020 | Grumman AA5 | Baxley, Georgia, United States | Baxley Aviation LLC | Minor injuries | - |
| 17 Aug 2020 | Cessna 182 | Savannah, Georgia, United States | F3EA Inc. | No injuries | - |