# 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.

Page 1 of 2 · 70 cases

## 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 LAX06CA039](https://openairdocs.org/ntsb/LAX06CA039.md): Cessna 182T · Livermore, CA · Accident · No injuries · Data collection · Final report · Oct 30, 2005 · N51732 · Substantial damage
  > substantial damage to the airplane during unknown phase of flight for undetermined reasons.
- [NTSB DCA05IA072](https://openairdocs.org/ntsb/DCA05IA072.md): Bombardier CL-600-2D15 · colorado spring, CO · Incident · No injuries · Incident investigation · Final report · Jun 10, 2005 · CGJAZ · No damage
  > Undetermined.
- [NTSB LAX05LA227](https://openairdocs.org/ntsb/LAX05LA227.md): Piper PA-28R-200 · Phoenix, AZ · Accident · No injuries · Limited investigation · Final report · Mar 11, 2005 · N2882R · Substantial damage
  > substantial damage to the airplane during an unknown phase of flight for undetermined reasons.
- [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 CHI01LA236](https://openairdocs.org/ntsb/CHI01LA236.md): Champion 7KCAB · Brooklyn, MI · Accident · Serious injuries · Limited investigation · Final report · Jul 22, 2001 · N7537F · Substantial damage
  > The forced landing for undetermined reasons. A factor to the accident was the corn crop.
- [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 SEA99LA122](https://openairdocs.org/ntsb/SEA99LA122.md): Cessna 150M · Glenns Ferry, ID · Accident · No injuries · Limited investigation · Final report · Jul 17, 1999 · N704AX · Substantial damage
  > The pilot's failure to maintain directional control during the attempted takeoff. A related factor was the pilot's lack of recent experience.
- [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 SEA97LA157](https://openairdocs.org/ntsb/SEA97LA157.md): Cessna 172M · UT · Accident · No injuries · Limited investigation · Final report · Jul 1, 1997 · N4395R · Substantial damage
  > 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 MIA95LA166](https://openairdocs.org/ntsb/MIA95LA166.md): Piper PA-23-250 · Orlando, FL · Accident · No injuries · Limited investigation · Final report · Jun 28, 1995 · N25AT · Substantial damage
  > Unknown.
- [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 ANC94LA133](https://openairdocs.org/ntsb/ANC94LA133.md): Champion 7ECA · Fairbanks, AK · Accident · No injuries · Limited investigation · Final report · Sep 10, 1994 · N68522 · Substantial damage
  > Undetermined.
- [NTSB ANC94LA127](https://openairdocs.org/ntsb/ANC94LA127.md): Piper PA-12 · Eagle, AK · Accident · No injuries · Limited investigation · Final report · Jul 30, 1994 · N3849M · Substantial damage
  > 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 FTW93TA#06](https://openairdocs.org/ntsb/FTW93TA%2306.md): Cessna CE-550 · Comayagua, Honduras · Accident · No injuries · Final report · Jun 17, 1993 · N2734K · Substantial damage
- [NTSB FTW93TA#07](https://openairdocs.org/ntsb/FTW93TA%2307.md): Piper PA-18-150 · Del Rio, TX · Accident · No injuries · Final report · Jun 12, 1993 · N83325 · Substantial damage
- [NTSB FTW93TA#04](https://openairdocs.org/ntsb/FTW93TA%2304.md): Piper PA-18-150 · Godley, TX · Accident · No injuries · Final report · May 16, 1993 · N2520S · Substantial damage
- [NTSB FTW93TA#03](https://openairdocs.org/ntsb/FTW93TA%2303.md): Bell 206B · Dallas, TX · Accident · No injuries · Final report · Mar 16, 1993 · N3211N · Substantial damage
- [NTSB DEN93LA014](https://openairdocs.org/ntsb/DEN93LA014.md): Champion 7KCAB · Boulder, CO · Accident · No injuries · Limited investigation · Final report · Dec 2, 1992 · N2751G · Substantial damage
  > Undetermined.
- [NTSB MIA92LA151](https://openairdocs.org/ntsb/MIA92LA151.md): Consolidated Aeronautics LA-4-200 · FL · Accident · No injuries · Limited investigation · Final report · Jul 9, 1992 · N2969P · Substantial damage
  > Substantial damage to the airplane during Unknown phase of flight for undetermined reasons.
- [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 DEN92LA043](https://openairdocs.org/ntsb/DEN92LA043.md): Cessna 172Q · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Mar 18, 1992 · N66076 · Substantial damage
  > Undetermined.
- [NTSB BFO92TA#01](https://openairdocs.org/ntsb/BFO92TA%2301.md): Mcdonnell Douglas 369E · Clinton, MD · Accident · No injuries · Final report · Feb 12, 1992 · N1600Q · Substantial damage
- [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 DEN91LA059](https://openairdocs.org/ntsb/DEN91LA059.md): Beech A36 · Salida, CO · Accident · No injuries · Limited investigation · Final report · Apr 6, 1991 · N4595S · Substantial damage
  > The dual student's poor takeoff technique, his failure to maintain directional control, and inadequate supervision by the PIC CFI. A factor was: the dual student's lack of experience in mountain flying.
- [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 FTW90GA040](https://openairdocs.org/ntsb/FTW90GA040.md): Aerospatiale AS-350B · Liberty Hill, TX · Accident · Serious injuries · Final report · Nov 30, 1989 · N5804T · Destroyed
  > Undetermined.
- [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 DEN88LA162](https://openairdocs.org/ntsb/DEN88LA162.md): Cessna 177RG · Santa Teresa, NM · Accident · No injuries · Limited investigation · Final report · Jul 17, 1988 · N34338 · Substantial damage
  > An unknown person or persons took a Cessna 177RG from a small airport near the mexican border, without permission. State police found it crashed in a field 2 miles southwest of Santa Teresa airport, and notified the owner. No witnesses have been found to…
- [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 MKC87LA080](https://openairdocs.org/ntsb/MKC87LA080.md): Fairchild SA-227 · Springfield, MO · Accident · No injuries · Limited investigation · Final report · Apr 7, 1987 · N26863 · Substantial damage
  > On April 6, 1987 a crew operating a metro iii, commuter acft noticed damage on both eng nacelles during a preflt insp. The commuter operator chief pilot was notified and an on site insp was made. The crew originally rptng the damage claimed they were not at…
- [NTSB MKC87LA046](https://openairdocs.org/ntsb/MKC87LA046.md): Cessna 150M · Kansas City, MO · Accident · No injuries · Limited investigation · Final report · Jan 24, 1987 · N671HA · Substantial damage
  > The student plt rptd colliding with a parked fuel truck during taxi on 1/24/87. Inspection of the acft revealed only minor leading edge skin damage to the rt wing. The acft was released for further trng flts. The acft operated for more than a wk with no one…
- [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…

Next page: https://openairdocs.org/ntsb.md?occurrence=400&page=2

## 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."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?occurrence=400

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