# NTSB investigations: Not determined, general

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 7 of 45 · 2,248 cases

## Cases, newest first

- [NTSB WPR21LA362](https://openairdocs.org/ntsb/WPR21LA362.md): Maule MX-7-235 · Ontario, OR · Accident · No injuries · Class 3 · Limited · Final report · Mar 28, 2021 · N235X · Substantial damage
  > A loss of hydraulic fluid and failure of the right brake for reasons that could not be determined due to a lack of available evidence.
- [NTSB WPR21LA140](https://openairdocs.org/ntsb/WPR21LA140.md): Cessna 172S · Everett, WA · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 23, 2021 · N2164Z · Substantial damage
  > A total loss of engine power during climb, for reasons that could not be determined based on available evidence.
- [NTSB WPR21LA142](https://openairdocs.org/ntsb/WPR21LA142.md): Davis Dan B Lancair Evolution · Phoenix, AZ · Accident · No injuries · Class 3 · Limited · Final report · Mar 18, 2021 · N469KS · Substantial damage
  > A malfunction of the main cabin door latching mechanism for reasons that could not be determined based on the available information.
- [NTSB ERA21LA152](https://openairdocs.org/ntsb/ERA21LA152.md): Cessna 421 · Franklin, NC · Accident · No injuries · Class 3 · Limited · Final report · Mar 12, 2021 · N80056 · Substantial damage
  > The reason for this accident could not be determined based on the available information.
- [NTSB ANC21LA020](https://openairdocs.org/ntsb/ANC21LA020.md): Robinson Helicopter R66 · Kodiak, AK · Accident · 1 fatal · Class 3 · Limited · Final report · Mar 3, 2021 · N1767 · Destroyed
  > An impact with ocean waters for reasons that could not be determined based on the available information.
- [NTSB ERA21LA144](https://openairdocs.org/ntsb/ERA21LA144.md): Cessna 172 · Boynton Beach, FL · Accident · No injuries · Class 3 · Limited · Final report · Feb 26, 2021 · N5631E · Substantial damage
  > A total loss of engine power for undetermined reasons.
- [NTSB ANC21LA018](https://openairdocs.org/ntsb/ANC21LA018.md): Diamond Aircraft Ind DA 40 · Lanai, HI · Accident · Serious injuries · Class 4 · Limited · Final report · Feb 26, 2021 · N680DS · Substantial damage
  > A total loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB ERA21LA141](https://openairdocs.org/ntsb/ERA21LA141.md): Steinman Mark E Lancair 320 · Atlantic Ocean (Atlantic Ocean) · Accident · 1 fatal · Class 3 · Limited · Final report · Feb 24, 2021 · N670BS · Substantial damage
  > The airplane’s impact with water for reasons that could not be determined.
- [NTSB ERA21FA133](https://openairdocs.org/ntsb/ERA21FA133.md): Piper PA32RT · Vinemont, AL · Accident · 2 fatal · Class 3 · Field · Final report · Feb 20, 2021 · N10KV · Destroyed
  > A loss of engine power for reasons that could not be determined.
- [NTSB ANC21FA015](https://openairdocs.org/ntsb/ANC21FA015.md): Cessna 185 · Chitina, AK · Accident · 2 fatal · Class 3 · Field · Final report · Feb 4, 2021 · N9725Z · Substantial damage
  > An in-flight breakup during cruise flight for reasons that could not be determined based on available evidence.
- [NTSB ERA21LA112](https://openairdocs.org/ntsb/ERA21LA112.md): Cessna U206 · Denton, NC · Accident · No injuries · Class 3 · Limited · Final report · Jan 23, 2021 · C-GWAS · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on available information.
- [NTSB ERA21LA123](https://openairdocs.org/ntsb/ERA21LA123.md): Piper PA-32-301 · Homestead, FL · Accident · No injuries · Class 4 · Limited · Final report · Jan 22, 2021 · N8224H · Substantial damage
  > A total loss of power for reasons that could not be determined, as the airplane was not recovered from the water following the ditching.
- [NTSB WPR21LA094](https://openairdocs.org/ntsb/WPR21LA094.md): Randy Wayne Maloney M1 · Eagle Point, OR · Accident · Minor injuries · Class 3 · Limited · Final report · Jan 21, 2021 · N322TR · Destroyed
  > A partial loss of engine power for reasons that could not be determined based on available evidence.
- [NTSB WPR21LA086](https://openairdocs.org/ntsb/WPR21LA086.md): Hughes 269C · Spanish Fork, UT · Accident · No injuries · Class 3 · Limited · Final report · Jan 13, 2021 · N7480F · Substantial damage
  > The loss of engine power during a practice autorotation for an undetermined reason.
- [NTSB ERA21LA102](https://openairdocs.org/ntsb/ERA21LA102.md): Kolb Firestar · Vineland, NJ · Accident · 1 fatal · Class 3 · Limited · Final report · Jan 11, 2021 · UNREG · Substantial damage
  > A steep descent and impact with terrain during final approach for reasons that could not be determined.
- [NTSB WPR21LA082](https://openairdocs.org/ntsb/WPR21LA082.md): Cessna 560 · Warm Springs, OR · Accident · 1 fatal · Class 3 · Limited · Final report · Jan 9, 2021 · N3RB · Destroyed
  > A loss of airplane control due to pilot incapacitation for reasons that could not be determined.
- [NTSB CEN21LA107](https://openairdocs.org/ntsb/CEN21LA107.md): Hawker Beechcraft G58 · Credit, AR · Accident · 2 fatal · Class 3 · Limited · Final report · Jan 4, 2021 · N325GC · Destroyed
  > A loss of left engine power for undetermined reasons, which resulted in an emergency descent with one engine inoperative and inadvertent collision with transmission lines. Contributing to the accident was the pilot’s inability to respond appropriately to the…
- [NTSB CEN21LA102](https://openairdocs.org/ntsb/CEN21LA102.md): Hughes 369D · Tuckers Crossing, MS · Accident · 1 fatal · Class 3 · Limited · Final report · Dec 29, 2020 · N103SU · Destroyed
  > The pilot’s loss of helicopter control when the external saw contacted trees during an attempted emergency landing due to a main rotor transmission oil pressure warning. The reason that the pilot did not release the external saw from the helicopter during the…
- [NTSB WPR21LA068](https://openairdocs.org/ntsb/WPR21LA068.md): Cirrus Design SR22 · Ogden, UT · Accident · Serious injuries · Class 3 · Limited · Final report · Dec 10, 2020 · N577CP · Substantial damage
  > The partial loss of engine power for reasons that cannot be determined due to lack of available evidence.
- [NTSB CEN21LA078](https://openairdocs.org/ntsb/CEN21LA078.md): Vans RV4 · Sadler, TX · Accident · Serious injuries · Class 3 · Limited · Final report · Dec 7, 2020 · N423WH · Substantial damage
  > The partial loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB CEN21LA072](https://openairdocs.org/ntsb/CEN21LA072.md): Grumman G164 · Elton, LA · Accident · No injuries · Class 3 · Limited · Final report · Dec 1, 2020 · N48594 · Substantial damage
  > The loss of engine power, which resulted in a forced landing on unsuitable terrain. The reason for the loss of engine power could not be determined based on available evidence.
- [NTSB WPR21LA052](https://openairdocs.org/ntsb/WPR21LA052.md): Bellanca 7GCBC · Fallbrook, CA · Accident · Minor injuries · Class 3 · Limited · Final report · Nov 11, 2020 · N57517 · Substantial damage
  > A partial loss of engine power for reasons that could not be determined with the available evidence.
- [NTSB WPR21LA061](https://openairdocs.org/ntsb/WPR21LA061.md): Cessna 172 · Arch Cape, OR · Accident · 1 fatal · Class 4 · Limited · Final report · Nov 9, 2020 · N1444V · Destroyed
  > The pilot’s descent into the ocean for reasons that could not be determined.
- [NTSB ANC21LA006](https://openairdocs.org/ntsb/ANC21LA006.md): Pilatus PC12 · Pacific Ocean (Pacific Ocean) · Accident · No injuries · Class 3 · Limited · Final report · Nov 6, 2020 · N400PW · Substantial damage
  > A total loss of engine power due to fuel starvation for reasons that could not be determined based on the available evidence.
- [NTSB WPR21LA064](https://openairdocs.org/ntsb/WPR21LA064.md): Stinson 108-3 · El Monte, CA · Accident · No injuries · Class 3 · Limited · Final report · Nov 3, 2020 · N6855M · Substantial damage
  > A loss of directional control during the landing roll due to an undetermined failure of the tailwheel assembly.
- [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 WPR21LA032](https://openairdocs.org/ntsb/WPR21LA032.md): Cessna 172 · Billings, MT · Accident · 1 fatal · Class 3 · Limited · Final report · Oct 31, 2020 · N124TW · Substantial damage
  > The pilot’s failure to maintain the proper descent glide path while on final approach for reasons that could not be determined from available evidence.
- [NTSB WPR21LA031](https://openairdocs.org/ntsb/WPR21LA031.md): Pearson Starduster · Cedar City, UT · Accident · No injuries · Class 4 · Limited · Final report · Oct 29, 2020 · N768P · Substantial damage
  > A loss of directional control for reasons that were not determined due to lack of 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 CEN21LA018](https://openairdocs.org/ntsb/CEN21LA018.md): Cessna T182 · Houma, LA · Accident · 2 fatal · Class 3 · Limited · Final report · Oct 16, 2020 · N707DA · Substantial damage
  > Impact with terrain for reasons that could not be determined with the available information.
- [NTSB ERA21LA009](https://openairdocs.org/ntsb/ERA21LA009.md): Watson Michael A Velocity Elite RG · Lady Lake, FL · Accident · Minor injuries · Class 3 · Limited · Final report · Oct 6, 2020 · N78BM · Substantial damage
  > A total loss of engine power during cruise flight for undetermined reasons.
- [NTSB CEN21LA001](https://openairdocs.org/ntsb/CEN21LA001.md): Cessna 210 · Cedaredge, CO · Accident · Serious injuries · Class 3 · Limited · Final report · Oct 4, 2020 · N9568X · Destroyed
  > A partial loss of engine power for reasons that could not be determined based on available evidence.
- [NTSB CEN21LA002](https://openairdocs.org/ntsb/CEN21LA002.md): Cessna 182 · Byers, CO · Accident · No injuries · Class 3 · Limited · Final report · Oct 3, 2020 · N9901E · Substantial damage
  > A partial loss of engine power for undetermined reasons.
- [NTSB WPR20LA320](https://openairdocs.org/ntsb/WPR20LA320.md): Great Lakes 2T1A · San Diego, CA · Accident · Serious injuries · Class 3 · Limited · Final report · Sep 24, 2020 · N3617L · Substantial damage
  > A loss of engine power for reasons that could not be determined, which resulted in a hard landing off airport.
- [NTSB WPR20CA316](https://openairdocs.org/ntsb/WPR20CA316.md): Piper PA 12 · Pacific City, OR · Accident · No injuries · Class 4 · Data collection · Final report · Sep 22, 2020 · N7754H · Substantial damage
  > A loss of directional control during landing for reasons that could not be determined due to lack of available evidence.
- [NTSB CEN20LA413](https://openairdocs.org/ntsb/CEN20LA413.md): Cosmos Phase 3 · Wayne, OK · Accident · Fatal · Class 3 · Limited · Final report · Sep 19, 2020 · N7024L · Substantial damage
  > A loss of control while taxiing for reasons that could not be determined based on available evidence.
- [NTSB CEN20LA400](https://openairdocs.org/ntsb/CEN20LA400.md): Safari S · Red Bud, IL · Accident · 1 fatal · Class 3 · Limited · Final report · Sep 19, 2020 · N60WD · Destroyed
  > A loss of control for reasons that could not be determined.
- [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 ERA20LA316](https://openairdocs.org/ntsb/ERA20LA316.md): Vans RV6 · Melbourne, FL · Accident · Minor injuries · Class 3 · Limited · Final report · Sep 11, 2020 · N196DJ · Substantial damage
  > A total loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB ERA20LA312](https://openairdocs.org/ntsb/ERA20LA312.md): Quad City Challenger · Sweetwater, TN · Accident · 1 fatal · Class 3 · Limited · Final report · Sep 10, 2020 · N56906 · Substantial damage
  > A loss of control for reasons that could not be determined based on the available information.
- [NTSB CEN20LA380](https://openairdocs.org/ntsb/CEN20LA380.md): Beech 35 · Canyon Lake, TX · Accident · Serious injuries · Class 3 · Limited · Final report · Sep 7, 2020 · N4636D · Substantial damage
  > The total loss of engine power for a reason that could not be determined based on available information.
- [NTSB CEN20CA386](https://openairdocs.org/ntsb/CEN20CA386.md): Piper PA-38-112 · Reserve, LA · Accident · Minor injuries · Class 4 · Data collection · Final report · Sep 4, 2020 · N567N · Substantial damage
  > The loss of engine power for undetermined reasons.
- [NTSB CEN20LA375](https://openairdocs.org/ntsb/CEN20LA375.md): Titan Mustang T-51 · Brighton, CO · Accident · 1 fatal · Class 3 · Limited · Final report · Sep 2, 2020 · N153JW · Substantial damage
  > The pilot’s loss of airplane control while maneuvering in the traffic pattern.
- [NTSB ERA20LA302](https://openairdocs.org/ntsb/ERA20LA302.md): Piper PA28R · Fletcher, NC · Accident · No injuries · Class 3 · Limited · Final report · Aug 27, 2020 · N9341N · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on available evidence.
- [NTSB WPR20LA288](https://openairdocs.org/ntsb/WPR20LA288.md): Cessna 210 · Chino, CA · Accident · No injuries · Class 3 · Limited · Final report · Aug 26, 2020 · N9540T · Substantial damage
  > The failure of the engine-driven hydraulic pump, which resulted in the main landing gear not fully extending and locking into place during landing. Contributing to the accident was the failure of the emergency gear extension system for reasons that could not…
- [NTSB ANC20LA083](https://openairdocs.org/ntsb/ANC20LA083.md): Eurocopter AS350 · Ninilchik, AK · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 25, 2020 · N160SH · Substantial damage
  > A loss of engine power for an undetermined reason.
- [NTSB CEN20LA352](https://openairdocs.org/ntsb/CEN20LA352.md): Beech 200 · Rockford, IL · Accident · 1 fatal · Class 3 · Limited · Final report · Aug 20, 2020 · N198DM · Destroyed
  > The pilot’s failure to maintain airplane control following a reduction of thrust in the left engine during takeoff. The reason for the reduction in thrust could not be determined based on the available evidence.
- [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 ERA20LA287](https://openairdocs.org/ntsb/ERA20LA287.md): Piper PA34 · Groton, CT · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 18, 2020 · N41382 · Substantial damage
  > The reported partial loss of right engine power for reasons that could not be determined based on available evidence.
- [NTSB CEN20LA346](https://openairdocs.org/ntsb/CEN20LA346.md): Beech 36 · San Benito, TX · Accident · Serious injuries · Class 3 · Limited · Final report · Aug 16, 2020 · N3256V · Substantial damage
  > A loss of engine power for a reason that could not be determined.

Next page: https://openairdocs.org/ntsb-findings/05000000/cases.md?page=8

## 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 f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f."findingCode", '05000000'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-findings/05000000/cases?page=7

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