# NTSB investigations: Amateur-built UNKNOWN ENG, TN

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB ERA21LA027](https://openairdocs.org/ntsb/ERA21LA027.md): Muse Stol CH 750 · Sewanee, TN · Accident · Minor injuries · Class 4 · Limited · Final report · Oct 14, 2020 · N750JD · Substantial damage
  > The airplane’s encounter with a downdraft during the initial climb, which resulted in an impact with trees.
- [NTSB GAA20CA043](https://openairdocs.org/ntsb/GAA20CA043.md): Zenair Zenith 801 · Knoxville, TN · Accident · No injuries · Data collection · Final report · Oct 18, 2019 · N801PZ · Substantial damage
  > The pilot's failure to maintain a proper descent rate during the approach and his improper landing flare, which resulted in a hard landing.
- [NTSB ERA19LA228](https://openairdocs.org/ntsb/ERA19LA228.md): Pietenpol BIG Piet · Gainesboro, TN · Accident · No injuries · Class 3 · Limited · Final report · Jul 16, 2019 · N973BP · Substantial damage
  > Separation of the spinner cap for reasons that could not be determined based on available evidence, which resulted in contact and subsequent separation of the wooden propeller blade tip.
- [NTSB ERA19LA139](https://openairdocs.org/ntsb/ERA19LA139.md): Marlow Bearhawk · Sevierville, TN · Accident · No injuries · Class 3 · Limited · Final report · Mar 27, 2019 · N22GM · Substantial damage
  > Abnormal combustion in the No. 1 cylinder for reasons that could not be determined based on the available evidence, followed by the activation of the ignition system circuit breaker, which resulted in a total loss of engine power.
- [NTSB ERA18FA240](https://openairdocs.org/ntsb/ERA18FA240.md): Lance M Hooley Jetez · Covington, TN · Accident · 1 fatal · Field investigation · Final report · Sep 1, 2018 · N815EY · Destroyed
  > The improper manufacture of the left wing, which resulted in a left wing flutter event and failure at low altitude and high speed.
- [NTSB GAA17CA467](https://openairdocs.org/ntsb/GAA17CA467.md): James D Riggs RV-10 · Lawrenceburg, TN · Accident · Serious injuries · Data collection · Final report · Jul 30, 2017 · N616JJ · Substantial damage
  > The pilot’s improper landing flare and failure to maintain yaw control during a go-around in gusting wind conditions.
- [NTSB ERA15FA353](https://openairdocs.org/ntsb/ERA15FA353.md): Aero Vodochody L39 · Oneida, TN · Accident · 1 fatal · Field investigation · Final report · Sep 12, 2015 · N139RT · Destroyed
  > The pilot's failure to maintain airplane control following a partial loss of engine power during initial climb. The reason for the partial loss of engine power could not be determined due to extensive postimpact damage.
- [NTSB ERA15CA005](https://openairdocs.org/ntsb/ERA15CA005.md): HPH 304CZ · Pikeville, TN · Accident · No injuries · Data collection · Final report · Oct 4, 2014 · N304AK · Substantial damage
  > A loss of aerodynamic lift, which resulted in an off-airport landing and subsequent impact with a pole.
- [NTSB ERA14FA461](https://openairdocs.org/ntsb/ERA14FA461.md): Eagle R&D Helicycle · Gallatin, TN · Accident · 1 fatal · Field investigation · Final report · Sep 28, 2014 · N7062U · Substantial damage
  > The pilot's decision to fly the improperly balanced helicopter at high speed and low altitude, which resulted in a loss of control and collision with terrain. Contributing to the accident were the pilot's depression and resulting degradation of executive…
- [NTSB ERA14FA421](https://openairdocs.org/ntsb/ERA14FA421.md): Klaas Development Lancair IV P · Ooltewah, TN · Accident · 1 fatal · Field investigation · Final report · Sep 3, 2014 · N541EM · Substantial damage
  > The inadequate torque of the propeller mounting bolts and inspection of the propeller, which resulted in the fatigue fracture of the bolts and a subsequent in-flight separation of the propeller assembly.
- [NTSB ERA13LA320](https://openairdocs.org/ntsb/ERA13LA320.md): Thompson Bruce D Sonerai II · Pulaski, TN · Accident · 1 fatal · Limited investigation · Final report · Jul 16, 2013 · N788T · Destroyed
  > The pilot's failure to maintain airspeed during a near-vertical climb after takeoff, which resulted in an aerodynamic stall and subsequent collision with terrain.
- [NTSB ERA12CA551](https://openairdocs.org/ntsb/ERA12CA551.md): Holloman L B/Holloman E M Sonex · Chapmansboro, TN · Accident · Minor injuries · Data collection · Final report · Sep 6, 2012 · N484PC · Substantial damage
  > The pilot’s failure to maintain directional control during the takeoff initial climb.
- [NTSB ERA10LA379](https://openairdocs.org/ntsb/ERA10LA379.md): Garlick Helicopters OH-58A+ · Newport, TN · Accident · Minor injuries · Limited investigation · Final report · Jul 28, 2010 · N48LA · Substantial damage
  > Inadequate maintenance inspections of the main rotor blade inertia screw holes, which resulted in a main rotor blade failure due to fatigue. Contributing to the accident was the pilot's inadequate preflight inspection of the main rotor blades.
- [NTSB ERA10CA332](https://openairdocs.org/ntsb/ERA10CA332.md): Crabtree RV6 · Sewanne, TN · Accident · No injuries · Data collection · Final report · Jun 25, 2010 · N3856D · Substantial damage
  > The pilot's improper recovery from a bounced landing.
- [NTSB ERA09LA498](https://openairdocs.org/ntsb/ERA09LA498.md): Hahn R-W22 Tiger Moth Rep · Symrna, TN · Accident · Serious injuries · Limited investigation · Final report · Sep 1, 2009 · N318JT · Destroyed
  > A loss of engine power for undetermined reasons.
- [NTSB ERA09LA325](https://openairdocs.org/ntsb/ERA09LA325.md): Smith Bret B Searey · Knoxville, TN · Accident · 2 fatal · Limited investigation · Final report · Jun 6, 2009 · N169GW · Substantial damage
  > The pilot's failure to maintain adequate airspeed, resulting in an aerodynamic stall and uncontrolled descent.
- [NTSB ERA09CA313](https://openairdocs.org/ntsb/ERA09CA313.md): Pensinger Zodiac 601 · Greeneville, TN · Accident · Minor injuries · Data collection · Final report · May 31, 2009 · N250JP · Substantial damage
  > An encounter with wind shear on initial climb after takeoff.
- [NTSB NYC08LA259](https://openairdocs.org/ntsb/NYC08LA259.md): Sands Thomas E Rotorway 162 · Graysville, TN · Accident · Serious injuries · Limited investigation · Final report · Jul 27, 2008 · N412TS · Destroyed
  > A loss of control for undetermined reasons.
- [NTSB MIA07FA137](https://openairdocs.org/ntsb/MIA07FA137.md): Beech A36 · Elizabethton, TN · Accident · 5 fatal · Field investigation · Final report · Sep 1, 2007 · N326DK · Destroyed
  > The poor in-flight planning by the pilot-in-command for flying towards rising terrain with inadequate clearance.
- [NTSB NYC07CA122](https://openairdocs.org/ntsb/NYC07CA122.md): Hanson Gerald Hanson Bucker 131E · Memphis, TN · Accident · Minor injuries · Data collection · Final report · May 19, 2007 · N234RX · Substantial damage
  > The pilot's inadequate visual lookout that resulted in a collision with a lighting structure in the grass while landing. A factor in the accident was the pilot's intentional landing in the runway safety area.
- [NTSB ATL06FA045](https://openairdocs.org/ntsb/ATL06FA045.md): Swearingen SA-226-TC · Paris, TN · Accident · 1 fatal · Field investigation · Final report · Feb 8, 2006 · N629EK · Destroyed
  > The pilot's inflight loss of control following a reported fuel asymmetry condition for undetermined reasons.
- [NTSB ATL05LA113](https://openairdocs.org/ntsb/ATL05LA113.md): Mize Donald Kolb MK III X · Dickson, TN · Accident · 1 fatal · Limited investigation · Final report · Jun 24, 2005 · N194DM · Substantial damage
  > The pilot's failure to maintain adequate obstacle clearance during climb out which resulted in the in-flight collision with a tree.
- [NTSB ATL03LA026](https://openairdocs.org/ntsb/ATL03LA026.md): Preceptor Ultra pup · Smithville, TN · Accident · No injuries · Limited investigation · Final report · Dec 22, 2002 · N5178D · Substantial damage
  > The pilot's inadequate preflight fuel planning of fuel resulted in fuel starvation, the total loss of engine power and the subsequent forced landing.
- [NTSB ATL97LA111](https://openairdocs.org/ntsb/ATL97LA111.md): Avid IV · Memphis, TN · Accident · No injuries · Limited investigation · Final report · Jul 21, 1997 · N913R · Substantial damage
  > The pilot's failure to maintain control of the aircraft during takeoff. A factor in the accident was the repositioning of the control stick.
- [NTSB ATL87DLT03](https://openairdocs.org/ntsb/ATL87DLT03.md): Burkhart Grob G102-111B · Memphis, TN · Accident · 1 fatal · Final report · Jul 11, 1987 · N3950L · Destroyed
  > Glider tow rope released at about 200FT following t/o. glider made rt turn followed by stall/spiral which continued until ground impact. Tow pilot saw glider pilot's hat falling to ground just after tow rope was released by glider pilot. Glider canopy was…
- [NTSB ATL83LA061](https://openairdocs.org/ntsb/ATL83LA061.md): Robinson R-22 · Nashville, TN · Accident · No injuries · Limited investigation · Final report · Dec 11, 1982 · N90773 · Substantial damage
  > During an autorotation at about 125 ft AGL the student attempted to apply power for a recovery but noted that the oil pressure light was illuminated & the eng had quit. The CFI took the controls & executed an emergency landing. He maneuvered to avoid power…
- [NTSB ATL82DA206](https://openairdocs.org/ntsb/ATL82DA206.md): Pitts S2S · Somerville, TN · Accident · No injuries · Final report · Jul 21, 1982 · N31461 · Substantial damage
  > Shortly after touchdown during a formation landing, the wingman's aircraft struck an engine stand that had been placed over a hole in the runway. The hole was located about 900 ft from the approach end and was about 2 ft long, 1 ft wide, and 1 ft deep. It was…
- [NTSB ATL82DA150](https://openairdocs.org/ntsb/ATL82DA150.md): Bell 47D1 · Blountville, TN · Accident · No injuries · Final report · May 29, 1982 · N10065 · Substantial damage
  > The aircraft lost power at 100 feet above ground level. An autorotation was attempted to a highway. The hard landing resulted in the main rotor severing the tail.
- [NTSB IAD80FLT06](https://openairdocs.org/ntsb/IAD80FLT06.md): Grumman G-164A · Montezuma, TN · Accident · No injuries · Closed · Apr 16, 1980 · N48408 · Substantial damage

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."eventStateOrRegion" = 'TN' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('99999'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=99999&state=TN

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.