# Fatal NTSB investigations: Undetermined

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 CHI07FA286](https://openairdocs.org/ntsb/CHI07FA286.md): Yakovlev Yak 52 · Lake-in-Hills, IL · Accident · 2 fatal · Field investigation · Final report · Sep 3, 2007 · N212YA · Substantial damage
  > The airplane descended and impacted terrain during initial climb for undetermined reasons. Contributing to the accident was the soft, uphill terrain.
- [NTSB CHI07FA279](https://openairdocs.org/ntsb/CHI07FA279.md): Socata TB-20 Trinidad · Pointe Aux Pins, MI · Accident · 2 fatal · Field investigation · Final report · Aug 24, 2007 · N96DF · Substantial damage
  > Undetermined.
- [NTSB CHI05FA063](https://openairdocs.org/ntsb/CHI05FA063.md): Beech BE-58 · Niles, MI · Accident · 4 fatal · Field investigation · Final report · Feb 4, 2005 · N12AZ · Destroyed
  > The steep nose down descent from cruise for undetermined reasons and the subsequent collision with terrain in a steep nose down attitude.
- [NTSB DFW05LA069](https://openairdocs.org/ntsb/DFW05LA069.md): Nolen Lite Squared · Holdenville, OK · Accident · 1 fatal · Limited investigation · Final report · Jan 14, 2005 · N222JN · Destroyed
  > Undetermined
- [NTSB FTW04FA186](https://openairdocs.org/ntsb/FTW04FA186.md): Bell 206 L-1 · Cameron, LA · Accident · 1 fatal · Field investigation · Final report · Jul 17, 2004 · N1078C · Destroyed
  > The helicopter's in-flight collision with water for undetermined reasons.
- [NTSB MIA03LA012](https://openairdocs.org/ntsb/MIA03LA012.md): Piper PA-46-350P · Memphis, TN · Accident · 2 fatal · Limited investigation · Final report · Nov 3, 2002 · N167MA · Destroyed
  > The cause of the accident is unknown as the airplane has not been located. A finding in the investigation was the fact that the pilot conducted an unstabilized approach; the flight was right, left, then right of the final approach course during the approach…
- [NTSB SEA02LA037](https://openairdocs.org/ntsb/SEA02LA037.md): Mooney M20C · Netarts, OR · Accident · 2 fatal · Limited investigation · Final report · Dec 11, 2001 · N5774Q · Destroyed
  > Reason for occurrence undetermined.
- [NTSB CHI01FA111](https://openairdocs.org/ntsb/CHI01FA111.md): Cessna 501 · Ashwaubenon, WI · Accident · 1 fatal · Field investigation · Final report · Apr 2, 2001 · N405PC · Destroyed
  > The pilot not maintaining aircraft control while maneuvering after takeoff and the pilot's inadequate preflight planning and preparation. Factors relating to the accident were the pilot's diverted attention while maneuvering after takeoff, the pilot's…
- [NTSB MIA00FA208](https://openairdocs.org/ntsb/MIA00FA208.md): Cessna 402C · Vieques, PR · Accident · 1 fatal · Field investigation · Final report · Jul 8, 2000 · N405MN · Destroyed
  > The airplanes entry into an uncontrolled descent for undetermined reasons from which it crashed into the ocean.
- [NTSB DCA00MA006](https://openairdocs.org/ntsb/DCA00MA006.md): Boeing 767-366-ER · Atlantic Ocean (Atlantic Ocean) · Accident · 217 fatal · Class 1 · Major · Final report · Oct 31, 1999 · SUGAP · Destroyed
  > The National Transportation Safety Board determines that the probable cause of the EgyptAir flight 990 accident is the airplane's departure from normal cruise flight and subsequent impact with the Atlantic Ocean as a result of the relief first officer's…
- [NTSB MIA99LA258](https://openairdocs.org/ntsb/MIA99LA258.md): Beech BE-200 · Atlantic Ocean (Atlantic Ocean) · Accident · 2 fatal · Limited investigation · Final report · Sep 19, 1999 · YV385 · Destroyed
  > undetermined.
- [NTSB ANC99LA065](https://openairdocs.org/ntsb/ANC99LA065.md): Stinson 108 · Anchorage, AK · Accident · 1 fatal · Limited investigation · Final report · May 24, 1999 · N793C · Destroyed
  > Undetermined.
- [NTSB MIA99LA156](https://openairdocs.org/ntsb/MIA99LA156.md): Champion Glastar · Mableton, GA · Accident · 2 fatal · Limited investigation · Final report · May 19, 1999 · N75419 · Destroyed
  > An in-flight loss of control for undetermined reasons, resulting in an in-flight collision with trees and the ground.
- [NTSB ANC99LA005](https://openairdocs.org/ntsb/ANC99LA005.md): Beech G-35 · Neah Bay, WA · Accident · 1 fatal · Limited investigation · Final report · Oct 4, 1998 · N4479D · Destroyed
  > Undetermined. Missing Aircraft.
- [NTSB ANC98LA001](https://openairdocs.org/ntsb/ANC98LA001.md): Piper PA-22-160 · Sterling, AK · Accident · 1 fatal · Limited investigation · Final report · Oct 3, 1997 · N8955D · Destroyed
  > Undetermined.
- [NTSB CHI97FAMS2](https://openairdocs.org/ntsb/CHI97FAMS2.md): Beech 95-C55 · Grand Haven, MI · Accident · 2 fatal · Missing aircraft · Final report · Apr 21, 1997 · N242BS · Destroyed
  > undetermined.
- [NTSB ANC97FA008](https://openairdocs.org/ntsb/ANC97FA008.md): Cessna 208B · Bethel, AK · Accident · 1 fatal · Field investigation · Final report · Nov 26, 1996 · N4704B · Destroyed
  > failure of the pilot to maintain control of the airplane, while maneuvering to reverse direction after takeoff, after encountering an undetermined anomaly. The undetermined anomaly was a related factor.
- [NTSB MIA95LA144](https://openairdocs.org/ntsb/MIA95LA144.md): Piper PA-32-260 · Vieques, PR · Accident · 1 fatal · Limited investigation · Final report · Jun 2, 1995 · N41528 · Substantial damage
  > Undetermined.
- [NTSB LAX95LA063](https://openairdocs.org/ntsb/LAX95LA063.md): McDonnell Douglas 500 · Chuuk Island (Pacific Ocean) · Accident · 2 fatal · Limited investigation · Final report · Dec 29, 1994 · N9128F · Destroyed
  > undetermined.
- [NTSB CHI94FA330](https://openairdocs.org/ntsb/CHI94FA330.md): Bell 47G-5A · Wisconsin Rpds, WI · Accident · 1 fatal · Field investigation · Final report · Mar 22, 1994 · N2991W · Destroyed
  > Undetermined.
- [NTSB LAX94LA187](https://openairdocs.org/ntsb/LAX94LA187.md): Bell 206A · Pacific Ocean (Pacific Ocean) · Accident · 2 fatal · Limited investigation · Final report · Mar 1, 1994 · N4712R · Destroyed
  > undetermined.
- [NTSB LAX94LA041](https://openairdocs.org/ntsb/LAX94LA041.md): Hughes 369D · Pacific Ocean (Pacific Ocean) · Accident · 2 fatal · Limited investigation · Final report · Nov 7, 1993 · N5172K · Destroyed
  > An undetermined event that resulted in the accident.
- [NTSB ATL92GA121](https://openairdocs.org/ntsb/ATL92GA121.md): Enstrom 280FX · Summerville, SC · Accident · 2 fatal · Final report · Jun 7, 1992 · N86262 · Destroyed
  > The pilot's inadvertent flight into IMC, which resulted in an in flight collision with trees. Factors were the obscured sky and foggy weather conditions, and the night lighting conditions at the time of the accident.
- [NTSB BFO92FA010](https://openairdocs.org/ntsb/BFO92FA010.md): Piper PA-28-140 · Chesapeake Bay, MD · Accident · 1 fatal · Field investigation · Final report · Oct 5, 1991 · N55657 · Destroyed
  > Undetermined. The aircraft wreckage has not been located.
- [NTSB CHI90LA280](https://openairdocs.org/ntsb/CHI90LA280.md): Piper PA-22-150 · Engadine, MI · Accident · 1 fatal · Limited investigation · Final report · Dec 2, 1989 · N2440P · Substantial damage
  > A collision with trees and the terrain for undetermined reasons.
- [NTSB ANC89LA181](https://openairdocs.org/ntsb/ANC89LA181.md): Cessna R172K · Anchorage, AK · Accident · 4 fatal · Limited investigation · Final report · Aug 12, 1989 · N1211V · Destroyed
  > Undetermined.
- [NTSB MIA87LA161](https://openairdocs.org/ntsb/MIA87LA161.md): Piper PA-23-250 · Missing, FL · Accident · 2 fatal · Limited investigation · Final report · May 14, 1987 · N640CC · Destroyed
  > The acft failed to arrive at its destination on a flight from miami, FL to aruba, netherland antilles via andros is, great inagua & port au prince. According to a flt plan filed by the plt the acft carried enough fuel for 8 hours & 30 minutes of flt, along…
- [NTSB LAX87LA058](https://openairdocs.org/ntsb/LAX87LA058.md): Cessna 182L · Oceano, CA · Accident · 2 fatal · Limited investigation · Final report · Nov 30, 1986 · N66CF · Destroyed
  > Witnesses stated that while the acft was climbing after takeoff, it appeared to be lower than normal. One witness rprtd that the eng sounded as if it was running rough. Another witness stated that the acft had begun making a left turn when he saw flames…
- [NTSB FTW86FA107](https://openairdocs.org/ntsb/FTW86FA107.md): Piper PA-31-350 · Huffman, TX · Accident · 2 fatal · Field investigation · Final report · Jun 13, 1986 · N3539K · Destroyed
  > The pilot was being vectored around thunderstorms in the area just prior to the accident. During the last radio contact the pilot was issued a vector to the destination airport. During this turn, for unknown reasons, the pilot lost control of the aircraft and…
- [NTSB CHI86FA033](https://openairdocs.org/ntsb/CHI86FA033.md): Piper PA-28-161 · Duluth, MN · Accident · 3 fatal · Field investigation · Final report · Nov 28, 1985 · N8082B · Destroyed
  > The pilot departed crystal lake for a flight to visit relatives for thanksgiving. He did not obtain a preflight weather briefing nor did he contact any ground facility during the flight. He was qualified to fly in VFR conditions only. The aircraft impacted…
- [NTSB DEN86FTE02](https://openairdocs.org/ntsb/DEN86FTE02.md): Beech 58 · Elbert, CO · Accident · 1 fatal · Final report · Nov 2, 1985 · N26BW · Destroyed
  > The acft crashed in a open field & was not found for 4 days. The home built acft, maintained largely by the plt, had the engine destroyed so completely that no determination could be made as to power being developed at impact. The plt reportedly had been…
- [NTSB CHI85FA351](https://openairdocs.org/ntsb/CHI85FA351.md): Cessna 404 · South Lyon, MI · Accident · 1 fatal · Field investigation · Final report · Aug 16, 1985 · N404EX · Destroyed
  > The acft took off and climbed to 5000 ft uneventfully. It then dropped off radar and subsequently impacted the ground in a flat upright attitude. A post-crash fire consumed the majority of the airframe. Eng and prop teardowns indicated no abnormalities and…
- [NTSB NYC85FA189](https://openairdocs.org/ntsb/NYC85FA189.md): Smith, Ted Aerostar Aerostar 601 · Erie, PA · Accident · 2 fatal · Field investigation · Final report · Jul 19, 1985 · N71MA · Destroyed
  > During a normal IFR cruise flight, the pilot of air Ohio flight 21, did not respond to ATC instructions. Air Ohio flight 21 continued for 40 minutes with no reply and without deviation in altitude or heading until the discrete target disappeared from radar…
- [NTSB FTW84LAMS5](https://openairdocs.org/ntsb/FTW84LAMS5.md): Cessna 152 · Missing Acft · Accident · 1 fatal · Final report · Sep 2, 1984 · N93480 · Destroyed
  > N93480 departed lafayette, la on a reported 2 hr sight-seeing flt over the gulf of Mexico & failed to return. There was no further contact with the plt & neither the plt nor the Acft have been found. The plt left a note suggesting possible suicide. Info…
- [NTSB CHI84FA255](https://openairdocs.org/ntsb/CHI84FA255.md): Robert B. Boston Glasair RG · Columbus, OH · Accident · 1 fatal · Field investigation · Final report · Jun 23, 1984 · N5177Y · Destroyed
  > The plt was on the 2nd leg of a flt to ferry the home-built acft to the lancaster arpt for further testing. After takeoff, he requested clearance to stay in the area for a few minutes. ATC asked him if he had a problem & the plt responded 'no, I just want to…
- [NTSB FTW84FA237](https://openairdocs.org/ntsb/FTW84FA237.md): Beech G35 · Tulsa, OK · Accident · 1 fatal · Field investigation · Final report · May 20, 1984 · N4239D · Destroyed
  > A witness stated it appeared as though the plt was attempting to perform a precautionary landing on a highway. As the acft reached the highway, the witness heard the engine accelerate to 'full power' and saw the acft pull up. The acft contacted the top static…
- [NTSB MIA84LA128](https://openairdocs.org/ntsb/MIA84LA128.md): Cessna 172 · Marathon, FL · Accident · 4 fatal · Limited investigation · Final report · Apr 2, 1984 · N64110 · Destroyed
  > The acft was missing after departing on a flt from maraton, FL to everglades city, FL. Sar personnel found the bodies of the plt & 3 pax, but the acft was not found. It was presumed to have been destroyed during a crash in the gulf of Mexico.
- [NTSB MIA84LA089](https://openairdocs.org/ntsb/MIA84LA089.md): Cessna P-210N · Key West, FL · Accident · 2 fatal · Limited investigation · Final report · Feb 21, 1984 · N731NJ · Destroyed
  > During his wx briefing the plt was given the flight precautions & enroute forecast along his proposed route of flt. Enroute at 14,000 ft the plt advised ARTCC that the flt had encountered rime ice. The controller cleared the flt to descend to 12,000 ft & the…
- [NTSB ATL83LA078](https://openairdocs.org/ntsb/ATL83LA078.md): Piper PA-28-180 · Daufuskie Islan, SC · Accident · 1 fatal · Limited investigation · Final report · Dec 30, 1982 · N9305J · Destroyed
  > The pilot's wife stated her husband had departed tampa, FL and could not recall if he had indicated a destination. She further stated her husband had a "charter". Investigation by law enforcement and drug enforcement personnel located cocaine in the aircraft…
- [NTSB LAX82DAMS1](https://openairdocs.org/ntsb/LAX82DAMS1.md): Wing D-1 · Catalina Island, CA · Accident · 2 fatal · Final report · Jun 11, 1982 · N8601M · Destroyed
  > The flt departed torrance at 1259 PDT & VFR conditions existed at the time. When the flt did not return a search was initiated. The search was terminated after 4 days. Friends & relatives speculated this may have been a dual instruction flt in preparation for…
- [NTSB FTW82FRA21](https://openairdocs.org/ntsb/FTW82FRA21.md): Piper PA-32 · Houston, TX · Accident · 1 fatal · Final report · Jun 5, 1982 · N36497 · Substantial damage
  > The acft was found in a rice field on 6/5/82. Narcotics were found in the acft along with a large quantity of money on the pilot's body. The acft had N38312 painted on the side. The acft was stolen in atlanta, ga in October of 1981.
- [NTSB ANC82FAG14](https://openairdocs.org/ntsb/ANC82FAG14.md): Cessna 180 · Skwenta, AK · Accident · 3 fatal · Final report · Jan 2, 1982 · N7641A · Destroyed
  > The aircraft departed finger lake at approximately 1000 ast for a short ice fishing trip to fish lakes. The aircraft never returned and a search was started. The wreckage was located near the kahiltna river about 5 miles from the intended destination on…

## 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."highestInjuryLevel" = 'Fatal'
  AND c."mKey" IN (SELECT o.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o."occurrenceNumber" = 1 AND o."occurrenceCode" = 400)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?fatal=1&occurrence=400

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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.