# Final NTSB investigations: Unknown

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 26 · 1,264 cases

## Latest cases

- [NTSB WPR26LA062](https://openairdocs.org/ntsb/WPR26LA062.md): Bell 407 · Las Vegas, NV · Accident · No injuries · Class 4 · Limited · Final report · Dec 15, 2025 · N404LL · Substantial damage
  > Tail rotor blade impact from an unidentified object at an undetermined time.
- [NTSB CEN25LA164](https://openairdocs.org/ntsb/CEN25LA164.md): Air Tractor AT802 · Atlantic Ocean, Canada · Accident · 1 fatal · Class 4 · Limited · Final report · Apr 29, 2025 · N4025K · Destroyed
  > The airplane’s impact with the ocean for undetermined reasons based on the available evidence.
- [NTSB WPR25LA080](https://openairdocs.org/ntsb/WPR25LA080.md): Piper PA-32-300 · Round Mountain, NV · Accident · 1 fatal · Class 3 · Limited · Final report · Jan 2, 2025 · N4151R · Substantial damage
  > Impact with mountainous terrain for reasons that could not be determined due to a lack of available evidence.
- [NTSB ERA25LA044](https://openairdocs.org/ntsb/ERA25LA044.md): Schweizer 269C-1 · Boalsburg, PA · Accident · No injuries · Class 3 · Limited · Final report · Nov 10, 2024 · N504JN · Substantial damage
  > A loss of engine power for reasons that could not be determined.
- [NTSB CEN25LA020](https://openairdocs.org/ntsb/CEN25LA020.md): Starship Enterprise · Addison, TX · Accident · No injuries · Class 4 · Limited · Final report · Oct 17, 2024 · N903SC · Substantial damage
  > Foreign object debris damage to the ventral stabilizer.
- [NTSB CEN24LA336](https://openairdocs.org/ntsb/CEN24LA336.md): Cessna 182D · Coopersville, MI · Accident · Class 4 · Limited · Final report · Aug 31, 2024 · N9020X · Substantial damage
  > The loss of airplane control while landing.
- [NTSB ANC24FA085](https://openairdocs.org/ntsb/ANC24FA085.md): Piper PA-18-150 · McGrath, AK · Accident · 1 fatal · Class 3 · Field · Final report · Aug 31, 2024 · N7154Z · Substantial damage
  > The pilot's exceedance of the airplane’s critical angle of attack while maneuvering for landing, which resulted in an aerodynamic stall and loss of control.
- [NTSB CEN24FA312](https://openairdocs.org/ntsb/CEN24FA312.md): Engineering & Research Ercoupe 415-C · Elkhart, IL · Accident · 1 fatal · Class 3 · Field · Final report · Aug 7, 2024 · N3093H · Destroyed
  > An off-airport landing in a soybean field for reasons that could not be determined. Contributing to the severity of the pilot’s injuries and airplane damage was a fire that occurred at an unknown time.
- [NTSB WPR24FA213](https://openairdocs.org/ntsb/WPR24FA213.md): Grumman Acft ENG Cor-Schweizer G-164A · Chamberino, NM · Accident · 1 fatal · Class 3 · Field · Final report · Jun 25, 2024 · N9709 · Destroyed
  > An aerodynamic stall and loss of control for reasons that could not be determined based on the available information.
- [NTSB WPR24LA193](https://openairdocs.org/ntsb/WPR24LA193.md): Cessna A185F · Monument Hills, CA · Accident · No injuries · Class 3 · Limited · Final report · Jun 12, 2024 · N8WF · Substantial damage
  > A total loss of engine power for reasons that could not be determined.
- [NTSB CEN24FA148](https://openairdocs.org/ntsb/CEN24FA148.md): Davis DA-3 · Antlers, OK · Accident · 3 fatal · Class 3 · Field · Final report · Apr 4, 2024 · N88DT · Destroyed
  > Impact with terrain for reasons that could not be determined.
- [NTSB CEN24LA119](https://openairdocs.org/ntsb/CEN24LA119.md): Zenith Stol CH750 · Sextonville, WI · Accident · Serious injuries · Class 3 · Limited · Final report · Feb 23, 2024 · N750WW · Substantial damage
  > A loss of engine power for reasons that could not be determined, followed by a loss of control and subsequent impact with terrain.
- [NTSB CEN24LA107](https://openairdocs.org/ntsb/CEN24LA107.md): Edge 540 · La Porte, TX · Accident · No injuries · Class 3 · Limited · Final report · Feb 3, 2024 · N321JA · Substantial damage
  > A loss of engine power after takeoff for undetermined reasons.
- [NTSB WPR24LA082](https://openairdocs.org/ntsb/WPR24LA082.md): Piper PA-18A 150 · Eden, OR · Accident · Serious injuries · Class 3 · Limited · Final report · Jan 26, 2024 · N7473D · Substantial damage
  > An impact with terrain for undetermined reasons.
- [NTSB ENG23LA045](https://openairdocs.org/ntsb/ENG23LA045.md): Bell 407 · Linden, NJ · Incident · Class 3 · Limited · Final report · Sep 21, 2023 · N406TD · No damage
  > The fracture of the upper-left tail boom attachment bolt due to abnormal loading of the bolt caused by a gap and misalignment between the upper-left longeron and the tail boom. Contributing to this incident was the lack of a check to verify the absence of…
- [NTSB CEN23LA376](https://openairdocs.org/ntsb/CEN23LA376.md): Sixchuter Spirit XL · Hovland, MN · Accident · 1 fatal · Class 4 · Limited · Final report · Aug 18, 2023 · N538DR · Destroyed
  > The collision with the lake by a noncertificated pilot for reasons that could not be determined.
- [NTSB CEN23FA352](https://openairdocs.org/ntsb/CEN23FA352.md): Cessna 150 · Caddo Mills, TX · Accident · 1 fatal · Class 3 · Field · Final report · Aug 7, 2023 · N5610E · Destroyed
  > The pilot’s loss of airplane control during an attempted forced landing following a loss of engine power.
- [NTSB CEN23FA204](https://openairdocs.org/ntsb/CEN23FA204.md): Luce Buttercup · Lyndonville, NY · Accident · 2 fatal · Class 3 · Field · Final report · May 28, 2023 · N18263 · Destroyed
  > An in-flight breakup due to structural overload of the airplane for undetermined reasons.
- [NTSB CEN23LA136](https://openairdocs.org/ntsb/CEN23LA136.md): Cessna 150F · Hillsboro, TX · Accident · Class 4 · Limited · Final report · Mar 1, 2023 · N3090X · Substantial damage
  > Substantial damage for reasons undetermined based on the available evidence.
- [NTSB CEN23LA022](https://openairdocs.org/ntsb/CEN23LA022.md): Piper PA-32R-300 · Evansville, IN · Accident · Serious injuries · Class 3 · Limited · Final report · Oct 30, 2022 · N349SB · Substantial damage
  > The total loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB WPR23LA025](https://openairdocs.org/ntsb/WPR23LA025.md): Airborne Windsports Edge X · Alturas, CA · Accident · 1 fatal · Class 3 · Limited · Final report · Oct 26, 2022 · N354MB · Substantial damage
  > The non-certificated pilot’s loss of control for undetermined reasons.
- [NTSB WPR22LA371](https://openairdocs.org/ntsb/WPR22LA371.md): Cessna 172M · Pacific Ocean, CA · Accident · 1 fatal · Class 3 · Limited · Final report · Aug 20, 2022 · N9670V
  > Undetermined because the airplane and pilot were not located.
- [NTSB ERA22LA287](https://openairdocs.org/ntsb/ERA22LA287.md): Mantell Allan T Lightning · Canandaigua, NY · Accident · Serious injuries · Class 3 · Limited · Final report · Jun 21, 2022 · N51TM · Minor damage
  > The pilot’s performance of an off-airport landing shortly after takeoff for reasons that could not be determined.
- [NTSB CEN22FA224](https://openairdocs.org/ntsb/CEN22FA224.md): Schweizer SGS135 · Midlothian, TX · Accident · 1 fatal · Class 3 · Field · Final report · Jun 5, 2022 · N2817H · No damage
  > The pilot’s incapacitation by an aortic dissection (natural disease).
- [NTSB CEN22LA156](https://openairdocs.org/ntsb/CEN22LA156.md): Cessna 172N · Springtown, TX · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 24, 2022 · N733KP · Substantial damage
  > A total loss of engine power for reasons that could not be determined.
- [NTSB CEN22LA137](https://openairdocs.org/ntsb/CEN22LA137.md): Cessna P210N · Englewood, CO · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 8, 2022 · N210GE · Destroyed
  > A total loss of engine power on short final for reasons that could not be determined based on the available evidence.
- [NTSB ANC22LA020](https://openairdocs.org/ntsb/ANC22LA020.md): Piper PA-18-135 · Wasilla, AK · Accident · Minor injuries · Class 3 · Limited · Final report · Feb 27, 2022 · N99640 · Substantial damage
  > A partial loss of engine power for undetermined reasons.
- [NTSB CEN22LA121](https://openairdocs.org/ntsb/CEN22LA121.md): Piper PA22 · Furlow, AR · Accident · Serious injuries · Class 3 · Limited · Final report · Feb 14, 2022 · N7337D · Substantial damage
  > A loss of engine power for undetermined reasons.
- [NTSB ANC22LA014](https://openairdocs.org/ntsb/ANC22LA014.md): Bell 205A-1 · El Cajon, CA · Accident · No injuries · Class 3 · Limited · Final report · Jan 15, 2022 · N502HQ · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB WPR22LA064](https://openairdocs.org/ntsb/WPR22LA064.md): Beech A36 · Tooele, UT · Accident · No injuries · Class 3 · Limited · Final report · Nov 24, 2021 · N4370W · Substantial damage
  > The total loss of engine power for reasons that could not be determined based on available evidence.
- [NTSB ERA22LA039](https://openairdocs.org/ntsb/ERA22LA039.md): Bell 47D1 · Zelienople, PA · Accident · No injuries · Class 3 · Limited · Final report · Oct 31, 2021 · N132BR · Substantial damage
  > A total loss of engine power for reasons that could not be determined.
- [NTSB ERA22LA029](https://openairdocs.org/ntsb/ERA22LA029.md): Cessna 172 · Westhampton Beach, NY · Accident · No injuries · Class 3 · Limited · Final report · Oct 23, 2021 · N1188L · Substantial damage
  > A total loss of engine power during cruise flight for reasons that could not be determined based on the available evidence.
- [NTSB WPR21LA366](https://openairdocs.org/ntsb/WPR21LA366.md): Sharp Ralph R Zenith Stol CH 701 · Bishop, CA · Accident · No injuries · Class 4 · Limited · Final report · Sep 24, 2021 · N701SA · Substantial damage
  > A loss of airplane control for undetermined reasons.
- [NTSB CEN21LA414](https://openairdocs.org/ntsb/CEN21LA414.md): Cessna 172S · LaSalle, CO · Accident · Minor injuries · Class 3 · Limited · Final report · Sep 10, 2021 · N2099J · Substantial damage
  > A loss of engine power for undetermined reasons.
- [NTSB CEN21LA404](https://openairdocs.org/ntsb/CEN21LA404.md): Cessna 182 · Delta, CO · Accident · No injuries · Class 3 · Limited · Final report · Sep 3, 2021 · N9114W · Substantial damage
  > A total loss of engine power that resulted in a forced landing and subsequent noseover. The reason for the total loss of engine power could not be determined based on the available evidence.
- [NTSB CEN21FA380](https://openairdocs.org/ntsb/CEN21FA380.md): Piper J3C-65 · Adrian, MO · Accident · 1 fatal · Class 3 · Field · Final report · Aug 22, 2021 · N70643 · Substantial damage
  > The pilot’s failure to maintain control of the airplane which resulted in an aerodynamic stall and impact with terrain.
- [NTSB CEN21LA367](https://openairdocs.org/ntsb/CEN21LA367.md): Pulsar Sport 150 · Osceola, WI · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 9, 2021 · N997EM · Substantial damage
  > The total loss of engine power for undermined reasons based on available information
- [NTSB CEN21LA450](https://openairdocs.org/ntsb/CEN21LA450.md): Cessna 140 · Caddo Mills, TX · Accident · No injuries · Class 4 · Limited · Final report · Jul 22, 2021 · N84BC · Substantial damage
  > The missing vertical stabilizer hardware, which resulted in a severe uncommanded yawing motion that necessitated an emergency landing, during which the airplane nosed over and sustained substantial damage to the vertical stabilizer.
- [NTSB CEN21LA307](https://openairdocs.org/ntsb/CEN21LA307.md): Quad City Challenger · Ste. Genevieve, MO · Accident · Serious injuries · Class 4 · Limited · Final report · Jul 5, 2021 · UNREG · Substantial damage
  > An impact with terrain for reasons that could not be determined based on available evidence.
- [NTSB ANC21LA047](https://openairdocs.org/ntsb/ANC21LA047.md): Piper J3C-65 · Sterling, AK · Accident · No injuries · Class 3 · Limited · Final report · Jun 28, 2021 · N98109 · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on the available information.
- [NTSB CEN21LA204](https://openairdocs.org/ntsb/CEN21LA204.md): Piper J3C-65 · Slaughter, LA · Accident · 1 fatal · Class 3 · Limited · Final report · Apr 26, 2021 · N26783 · Substantial damage
  > A total loss of engine power for reasons that could not be determined from the available evidence.
- [NTSB WPR21LA164](https://openairdocs.org/ntsb/WPR21LA164.md): Cessna 208B · Fairbanks, AK · Accident · No injuries · Class 3 · Limited · Final report · Apr 3, 2021 · N215MC · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on available evidence.
- [NTSB CEN21LA088](https://openairdocs.org/ntsb/CEN21LA088.md): Rans S12XL · Port Isabel, TX · Accident · 2 fatal · Class 3 · Limited · Final report · Dec 16, 2020 · N449JP · Substantial damage
  > An exceedance of the airplane’s critical angle of attack and aerodynamic stall following a loss of engine power during an unknown phase of flight, which resulted in an impact with terrain.
- [NTSB ANC21LA004](https://openairdocs.org/ntsb/ANC21LA004.md): AutoGyro MTO Sport · Whitewater, KS · Accident · 2 fatal · Class 3 · Limited · Final report · Nov 3, 2020 · N455WM · Destroyed
  > A loss of control for reasons that could not be determined based on the available evidence.
- [NTSB CEN21LA035](https://openairdocs.org/ntsb/CEN21LA035.md): Piper PA28 · Crystal Beach, TX · Accident · No injuries · Class 3 · Limited · Final report · Oct 26, 2020 · N32458 · Substantial damage
  > The partial loss of engine power for reasons that could not be determined.
- [NTSB CEN21FA024](https://openairdocs.org/ntsb/CEN21FA024.md): Glasair III · Ford Heights, IL · Accident · 1 fatal · Class 3 · Field · Final report · Oct 20, 2020 · N713MJ · Substantial damage
  > The loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB CEN20LA392](https://openairdocs.org/ntsb/CEN20LA392.md): Cessna 172 · Cottage Grove, MN · Accident · 3 fatal · Class 3 · Limited · Final report · Sep 13, 2020 · N8488L · Destroyed
  > A steep descent and impact with terrain for reasons that could not be determined based on the available information.
- [NTSB WPR20LA279](https://openairdocs.org/ntsb/WPR20LA279.md): Cessna 150 · Quillayute, WA · Accident · Fatal · Class 4 · Limited · Final report · Aug 19, 2020 · N11513 · Substantial damage
  > The airplane’s descent into trees and subsequent impact with terrain for undetermined reasons.
- [NTSB WPR20LA225](https://openairdocs.org/ntsb/WPR20LA225.md): Vans RV 8 · Grimes, CA · Accident · No injuries · Class 3 · Limited · Final report · Jul 17, 2020 · N508CM · Substantial damage
  > A partial loss of engine power for reasons that could not be determined because the airplane was not examined.
- [NTSB CEN20LA266](https://openairdocs.org/ntsb/CEN20LA266.md): Lancair ES-P · Pauls Valley, OK · Accident · Serious injuries · Class 3 · Limited · Final report · Jul 6, 2020 · N444TW · Destroyed
  > The reason for this accident could not be determined based on the available information.

Next page: https://openairdocs.org/ntsb-phases/990/cases.md?status=final&page=2

## The whole list in SQL

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

```sql
WITH phase_names(main, name) AS (VALUES (100, 'Prior to flight'), (150, 'Standing'), (200, 'Pushback/towing'), (250, 'Taxi'), (300, 'Takeoff'), (350, 'Initial climb'), (400, 'Enroute'), (450, 'Maneuvering'), (500, 'Approach'), (550, 'Landing'), (600, 'Emergency descent'), (650, 'Uncontrolled descent'), (700, 'Post-impact'), (750, 'After landing'), (800, 'Other'), (990, 'Unknown')),
  crosswalk(code, main, name) AS (VALUES (500, 150, 'Standing'), (501, 150, 'Standing - pre-flight'), (502, 150, 'Standing - starting engine(s)'), (503, 150, 'Standing - engine(s) operating'), (504, 150, 'Standing - engine(s) not operating'), (505, 150, 'Standing - idling rotors'), (510, 250, 'Taxi'), (511, 200, 'Taxi - pushback/tow'), (512, 250, 'Taxi - to takeoff'), (513, 250, 'Taxi - from landing'), (514, 250, 'Taxi - aerial'), (520, 300, 'Takeoff'), (521, 300, 'Takeoff - roll/run'), (522, 350, 'Takeoff - initial climb'), (523, 300, 'Takeoff - aborted'), (530, 400, 'Climb'), (531, 400, 'Climb - to cruise'), (540, 400, 'Cruise'), (541, 400, 'Cruise - normal'), (542, 400, 'Maneuvering - holding (IFR)'), (550, 400, 'Descent'), (551, 400, 'Descent - normal'), (552, 600, 'Descent - emergency'), (553, 650, 'Descent - uncontrolled'), (560, 500, 'Approach'), (561, 500, 'Approach - VFR pattern - downwind'), (562, 500, 'Approach - VFR pattern - base turn'), (563, 500, 'Approach - VFR pattern - base leg/base to final'), (564, 500, 'Approach - VFR pattern - final approach'), (565, 500, 'Go-around (VFR)'), (566, 500, 'Approach - IAF to FAF/outer marker (IFR)'), (567, 500, 'Approach - FAF/outer marker to threshold (IFR)'), (568, 500, 'Circling (IFR)'), (569, 500, 'Missed approach (IFR)'), (570, 550, 'Landing'), (571, 550, 'Landing - flare/touchdown'), (572, 550, 'Landing - roll'), (573, 550, 'Landing - aborted'), (574, 550, 'Emergency landing'), (575, 550, 'Emergency landing after takeoff'), (576, 600, 'Emergency descent/landing'), (580, 450, 'Maneuvering'), (581, 450, 'Maneuvering - aerial application'), (582, 450, 'Maneuvering - turn to reverse direction'), (583, 450, 'Maneuvering - turn to landing area (emergency)'), (590, 450, 'Hover'), (591, 450, 'Hover - in ground effect'), (592, 450, 'Hover - out of ground effect'), (600, 800, 'Other'), (610, 990, 'Unknown')),
  current_codes AS (
    SELECT e.case_mkey, TRY_CAST(e."tier1Number" AS INTEGER) AS code,
      row_number() OVER (PARTITION BY e.case_mkey ORDER BY coalesce(e."isDefiningEvent", false) DESC, e.position) AS n
    FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e
    WHERE e.aircrafts_position = 1 AND e."tier1Number" GLOB '[1-9][0-9]*'
      AND (e."isDefiningEvent" OR e.case_mkey IN (SELECT "mKey" FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' WHERE "isPre1982"))
  ),
  phases AS (
    SELECT case_mkey, 'current' AS scheme, code, CASE WHEN code >= 990 THEN 990 ELSE code // 50 * 50 END AS main
    FROM current_codes WHERE n = 1
    UNION ALL
    SELECT o.case_mkey, 'older', o."phaseOfFlightCode", w.main
    FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o JOIN crosswalk w ON w.code = o."phaseOfFlightCode"
    WHERE o.aircrafts_position = 1 AND o."occurrenceNumber" = 1 AND o.case_mkey NOT IN (SELECT case_mkey FROM current_codes)
  ),
  case_phases AS (
    SELECT p.*, c."eventDate", c."highestInjuryLevel" = 'Fatal' AS fatal, a.aircraft_model_code
    FROM phases p JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c."mKey" = p.case_mkey
    LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = p.case_mkey AND a.position = 1
    WHERE c."eventDate" >= DATE '1962-01-01' AND p.main IN (SELECT main FROM phase_names)
  )
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."completionStatus" = 'Completed'
  AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 990)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/990/cases?status=final

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