# 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 20 of 45 · 2,248 cases

## Cases, newest first

- [NTSB CEN16LA040](https://openairdocs.org/ntsb/CEN16LA040.md): Robinson Helicopter R22 Beta · Sugarland, TX · Accident · Minor injuries · Limited investigation · Final report · Nov 14, 2015 · N7058Z · Substantial damage
  > The overspeed of the main rotor system for reasons that could not be determined based on the available information.
- [NTSB ERA16LA040](https://openairdocs.org/ntsb/ERA16LA040.md): Cirrus Design SR22 · Jefferson, NC · Accident · No injuries · Limited investigation · Final report · Nov 13, 2015 · N334CM · Substantial damage
  > A total loss of engine power for reasons that could not be determined during a postaccident test run of the engine.
- [NTSB CEN16FA037](https://openairdocs.org/ntsb/CEN16FA037.md): Cessna 182Q · Richmond, MO · Accident · 1 fatal · Field investigation · Final report · Nov 11, 2015 · N96381 · Substantial damage
  > The airplane's impact with trees and terrain during an off-airport forced landing in dark night conditions following a partial loss of engine power. The reason for the partial loss of engine power could not be determined because postaccident examination did…
- [NTSB CEN16LA031](https://openairdocs.org/ntsb/CEN16LA031.md): American Autogyro Sparrowhawk · Wakeman, OH · Accident · Minor injuries · Limited investigation · Final report · Nov 4, 2015 · N80825 · Substantial damage
  > A loss of engine power/performance for reasons that could not be determined because a postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB WPR16LA020](https://openairdocs.org/ntsb/WPR16LA020.md): Bell 206B · Dallas, OR · Accident · Minor injuries · Limited investigation · Final report · Nov 2, 2015 · N22743 · Substantial damage
  > A loss of engine power for reasons that could not be determined based on the available information.
- [NTSB ERA16LA030](https://openairdocs.org/ntsb/ERA16LA030.md): Hughes 369D · Marion, SC · Accident · No injuries · Limited investigation · Final report · Oct 30, 2015 · N920JP · Substantial damage
  > A momentary jam in the tail rotor control system from an undetermined source, resulting in a torsional fracture of the tail rotor control torque tube and a loss of helicopter control.
- [NTSB WPR16LA019](https://openairdocs.org/ntsb/WPR16LA019.md): American Eurocopter AS350B3 · Folsom, CA · Accident · No injuries · Limited investigation · Final report · Oct 24, 2015 · N911WL · Substantial damage
  > The flight instructor's failure to perform simulated engine failure training in accordance with manufacturer guidance, including his improper recovery from the maneuver, which resulted in an overshoot of the intended landing zone when the engine did not…
- [NTSB CEN16LA021](https://openairdocs.org/ntsb/CEN16LA021.md): Piper PA 28-235 · Winneconne, WI · Accident · No injuries · Limited investigation · Final report · Oct 24, 2015 · N3979X · Substantial damage
  > An engine compartment fire during landing, which resulted in extensive fire damage, for reasons that could not be determined during examinations of the remaining wreckage.
- [NTSB ERA16LA058](https://openairdocs.org/ntsb/ERA16LA058.md): Cessna R182 · Sanford, FL · Accident · No injuries · Limited investigation · Final report · Oct 17, 2015 · N381MB · Substantial damage
  > A collapse of the nose landing gear due to a separation of the drag attachment fitting from the airframe. The separation was likely due to preexisting damage from an undetermined event.
- [NTSB WPR16LA011](https://openairdocs.org/ntsb/WPR16LA011.md): Christopher Tom Kitfox 5 · Battle Ground, WA · Accident · No injuries · Limited investigation · Final report · Oct 14, 2015 · N533RC · Substantial damage
  > The total loss of engine power for reasons that could not be determined because postaccident examination of the engine revealed no preimpact mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB ERA16FA012](https://openairdocs.org/ntsb/ERA16FA012.md): Piper PA 28-180 · Lake Worth, FL · Accident · 2 fatal · Field investigation · Final report · Oct 13, 2015 · N57312 · Destroyed
  > A loss of control for reasons that could not be determined based on the available information.
- [NTSB ERA16LA009](https://openairdocs.org/ntsb/ERA16LA009.md): Cessna 172N · Miami Beach, FL · Accident · No injuries · Limited investigation · Final report · Oct 11, 2015 · N733VB · Substantial damage
  > A total loss of engine power for reasons that could not be determined because the airplane was not recovered from the ocean after the ditching.
- [NTSB CEN16LA019](https://openairdocs.org/ntsb/CEN16LA019.md): Quest Kodiak 100 · Sheridan, WY · Accident · Serious injuries · Limited investigation · Final report · Oct 9, 2015 · N153RW · Substantial damage
  > The loss of airplane control during takeoff for reasons that could not be determined based on the available information.
- [NTSB WPR16LA005](https://openairdocs.org/ntsb/WPR16LA005.md): Piper PA28 · Compton, CA · Accident · Serious injuries · Limited investigation · Final report · Oct 7, 2015 · N7506W · Substantial damage
  > A total loss of engine power during initial climb for reasons that could not be determined because postaccident engine examination did not reveal any anomalies that would have precluded normal operation.
- [NTSB CEN16LA003](https://openairdocs.org/ntsb/CEN16LA003.md): Bell 47G · Huntsville, TX · Accident · Minor injuries · Limited investigation · Final report · Oct 5, 2015 · N160CS · Substantial damage
  > The pilot's loss of helicopter control during an agricultural application pass for reasons that could not be determined due to the extent of damage to the flight control system.
- [NTSB WPR16LA003](https://openairdocs.org/ntsb/WPR16LA003.md): Cessna TU206G · Fall City, WA · Accident · Serious injuries · Limited investigation · Final report · Oct 3, 2015 · N206HL · Substantial damage
  > The airplane’s collision with the ground short of the runway for reasons that could not be determined based on the available evidence.
- [NTSB ERA16FA001](https://openairdocs.org/ntsb/ERA16FA001.md): Piper PA32R · Westminster, SC · Accident · 4 fatal · Field investigation · Final report · Oct 2, 2015 · N782TM · Destroyed
  > The pilot's loss of airplane control for reasons that could not be determined based on the available information.
- [NTSB CEN15FA426](https://openairdocs.org/ntsb/CEN15FA426.md): Jones Ralph D Zodiac CH 601 HD · Ama, LA · Accident · 1 fatal · Field investigation · Final report · Sep 26, 2015 · N401 · Substantial damage
  > The pilot's failure to maintain adequate airspeed and his exceedance of the airplane's critical angle of attack following a loss of engine power for reasons that could not be determined based on available evidence, which resulted in an aerodynamic stall and…
- [NTSB WPR15LA265](https://openairdocs.org/ntsb/WPR15LA265.md): Aero Commander 680 E · Boise, ID · Accident · Serious injuries · Limited investigation · Final report · Sep 21, 2015 · N222JS · Substantial damage
  > The pilot's failure to maintain airplane control following an engine problem for reasons that could not be determined because postaccident examination of both engines and the rudder revealed no malfunctions or anomalies that would have precluded normal…
- [NTSB CEN15LA418](https://openairdocs.org/ntsb/CEN15LA418.md): Cessna 421B · Platteville, WI · Accident · Minor injuries · Limited investigation · Final report · Sep 21, 2015 · N813CA · Substantial damage
  > The partial loss of right engine power for undetermined reasons with insufficient runway remaining for the aborted takeoff.
- [NTSB ERA15FA362](https://openairdocs.org/ntsb/ERA15FA362.md): Cessna 150H · Morrisville, NY · Accident · 2 fatal · Field investigation · Final report · Sep 20, 2015 · N22721 · Destroyed
  > The pilot's failure to maintain airspeed and her exceedance of the airplane's critical angle-of-attack, which led to an aerodynamic stall, following a total loss of engine power for reasons that could not be determined because postaccident examination of the…
- [NTSB CEN15LA444](https://openairdocs.org/ntsb/CEN15LA444.md): Piper PA 24-250 · New Orleans, LA · Accident · No injuries · Limited investigation · Final report · Sep 19, 2015 · N7803P · Substantial damage
  > The collapse of the landing gear for reasons that could not be determined based on the available information.
- [NTSB ANC15LA073](https://openairdocs.org/ntsb/ANC15LA073.md): Robinson Helicopter R44 · Fort Glenn, AK · Accident · No injuries · Limited investigation · Final report · Sep 19, 2015 · N7162R · Substantial damage
  > The separation of the tail rotor gearbox from the tailboom attachment point due to overstress loads imposed by a tail rotor blade imbalance as the result of impact with an undetermined object during low-level flight operations.
- [NTSB WPR15LA261](https://openairdocs.org/ntsb/WPR15LA261.md): Schweizer 269C · Forest Grove, OR · Accident · Minor injuries · Limited investigation · Final report · Sep 18, 2015 · N290R · Substantial damage
  > A partial loss of engine power during cruise flight for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB GAA15LA281](https://openairdocs.org/ntsb/GAA15LA281.md): Dehavilland DHC 2 MK.I · Nikolai, AK · Accident · No injuries · Limited investigation · Final report · Sep 14, 2015 · N676SP · Substantial damage
  > A loss of directional control during a water takeoff for reasons that could not be determined because the airplane was not examined due to the remote accident location.
- [NTSB CEN15LA439](https://openairdocs.org/ntsb/CEN15LA439.md): Robinson Helicopter R44 II · Alice, TX · Accident · No injuries · Limited investigation · Final report · Sep 14, 2015 · N442CF · Substantial damage
  > A loss of engine power during a practice power recovery autorotation for reasons that could not be determined based on the available information.
- [NTSB ANC15LA070](https://openairdocs.org/ntsb/ANC15LA070.md): Helio H 295 · Delta Junction, AK · Accident · No injuries · Limited investigation · Final report · Sep 13, 2015 · N6464V · Substantial damage
  > A partial loss of engine power during takeoff for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.
- [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 CEN15LA412](https://openairdocs.org/ntsb/CEN15LA412.md): Guisinger Gary G Baby Belle · Stuart, IA · Accident · Minor injuries · Limited investigation · Final report · Sep 12, 2015 · N135PA · Substantial damage
  > The failure of the tail rotor driveshaft for reasons that could not be determined due to the mechanically and thermally deformed fracture surface.
- [NTSB ERA15FA351](https://openairdocs.org/ntsb/ERA15FA351.md): Cessna 172 · Riegelwood, NC · Accident · 1 fatal · Field investigation · Final report · Sep 11, 2015 · N52445 · Substantial damage
  > The noncertificated pilot’s failure to maintain adequate clearance from terrain for reasons that could not be determined based on the available evidence.
- [NTSB ERA15LA343](https://openairdocs.org/ntsb/ERA15LA343.md): Dehavilland DHC-6 · Louisburg, NC · Accident · Serious injuries · Limited investigation · Final report · Sep 6, 2015 · N181CS · Substantial damage
  > The propeller’s movement to the beta position during landing for reasons that could not be determined during postaccident examination and testing, which resulted in an attempted go-around and subsequent loss of airplane control.
- [NTSB CEN15LA404](https://openairdocs.org/ntsb/CEN15LA404.md): Cessna TR182 · Midland, TX · Accident · 1 fatal · Limited investigation · Final report · Sep 5, 2015 · N4707S · Substantial damage
  > The partial loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB WPR15LA257](https://openairdocs.org/ntsb/WPR15LA257.md): Hughes 369HS · Manra Island, Kiribati · Accident · 1 fatal · Limited investigation · Final report · Sep 3, 2015 · N9068F · Destroyed
  > A The loss of helicopter control for reasons that could not be determined asbecause the helicopter sank in the oceanwater and was not recovered.
- [NTSB WPR15LA254](https://openairdocs.org/ntsb/WPR15LA254.md): Raudenbush Ernie Lancair Super ES · Winkelman, AZ · Accident · Minor injuries · Limited investigation · Final report · Sep 1, 2015 · N74ES · Destroyed
  > A partial loss of engine power for reasons that could not be determined because postaccident examination of the engine revealed no anomalies.
- [NTSB CEN15LA391](https://openairdocs.org/ntsb/CEN15LA391.md): Ference John W Thatcher CX4A · Hebron, OH · Accident · Minor injuries · Limited investigation · Final report · Aug 31, 2015 · N443JF · Substantial damage
  > The loss of engine power for reasons that could not be determined because a postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB ERA15LA334](https://openairdocs.org/ntsb/ERA15LA334.md): Beech B19 · Dexter, ME · Accident · Serious injuries · Limited investigation · Final report · Aug 29, 2015 · N2013G · Substantial damage
  > The flight instructor’s inadequate preflight planning, which resulted in collision with trees and terrain during takeoff.
- [NTSB ERA15LA333](https://openairdocs.org/ntsb/ERA15LA333.md): Beech E 90 · Fayetteville, TN · Accident · No injuries · Limited investigation · Final report · Aug 28, 2015 · N891PC · Substantial damage
  > A total loss of electrical power for reasons that could not be determined and the pilot's subsequent failure to properly follow the manual landing gear extension procedures, which resulted in the landing gear not extending.
- [NTSB ERA15FA330](https://openairdocs.org/ntsb/ERA15FA330.md): Cirrus Design SR22 · Alabaster, AL · Accident · 1 fatal · Field investigation · Final report · Aug 28, 2015 · N1116C · Substantial damage
  > An in-flight loss of airplane control for reasons that could not be determined because postaccident examination of the airframe and engine revealed no preimpact mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB CEN15LA389](https://openairdocs.org/ntsb/CEN15LA389.md): Air Tractor AT 502B · Monroe, NE · Accident · Minor injuries · Limited investigation · Final report · Aug 27, 2015 · N61267 · Substantial damage
  > Loss of propeller thrust for reasons that could not be determined, since examination of the airplane's engine, propeller, and associated accessories revealed no anomalies.
- [NTSB CEN15FA374](https://openairdocs.org/ntsb/CEN15FA374.md): Beech 35 B33 · El Dorado, AR · Accident · 1 fatal · Field investigation · Final report · Aug 23, 2015 · N9704Y · Destroyed
  > The loss of engine power for reasons that could not be determined during postaccident examination of the accident site or based on the available information and the pilot's failure to maintain adequate airspeed and his exceedance of the airplane's critical…
- [NTSB ANC15FA066](https://openairdocs.org/ntsb/ANC15FA066.md): Cessna 180 · Kasilof, AK · Accident · 2 fatal · Field investigation · Final report · Aug 23, 2015 · N3043E · Substantial damage
  > The total loss of engine power for reasons that could not be determined based on postaccident examination and testing.
- [NTSB ERA15LA323](https://openairdocs.org/ntsb/ERA15LA323.md): Cessna 150 · Dorado, PR · Accident · Serious injuries · Limited investigation · Final report · Aug 22, 2015 · N4057V · Substantial damage
  > A short circuit of unknown origin, which resulted in electrical arcing in the engine compartment and smoke in the cockpit, which necessitated a precautionary landing to a field.
- [NTSB WPR15LA245](https://openairdocs.org/ntsb/WPR15LA245.md): Schweizer 269C · Las Vegas, NV · Accident · Minor injuries · Limited investigation · Final report · Aug 18, 2015 · N17YS · Substantial damage
  > A total loss of engine power during a practice autorotation for reasons that could not be determined.
- [NTSB ERA15LA318](https://openairdocs.org/ntsb/ERA15LA318.md): Cessna 172K · Chiefland, FL · Accident · No injuries · Limited investigation · Final report · Aug 17, 2015 · N84308 · Substantial damage
  > The partial loss of engine power during cruise flight for reasons that could not be determined because a postaccident airframe and engine examination and engine test run revealed no evidence of mechanical malfunctions or failures.
- [NTSB WPR15LA242](https://openairdocs.org/ntsb/WPR15LA242.md): Bartels Lancair · Pacific Ocean (Pacific Ocean) · Accident · 1 fatal · Limited investigation · Final report · Aug 14, 2015 · N427LE · Destroyed
  > The pilot's incapacitation for reasons that could not be determined because the airplane was not recovered from the ocean.
- [NTSB ERA15FA308](https://openairdocs.org/ntsb/ERA15FA308.md): Beech N35 · Weirsdale, FL · Accident · 2 fatal · Field investigation · Final report · Aug 12, 2015 · N390Z · Destroyed
  > A partial loss of engine power during takeoff. The reason for the partial loss of power could not be determined due to the extensive fire and impact damage to the engine.
- [NTSB CEN15LA377](https://openairdocs.org/ntsb/CEN15LA377.md): Grumman G 164B · Sac City, IA · Accident · No injuries · Limited investigation · Final report · Aug 12, 2015 · N311AL · Substantial damage
  > The loss of engine power for reasons that could not be determined based on the available information.
- [NTSB ERA15LA306](https://openairdocs.org/ntsb/ERA15LA306.md): Wright Daniel J Volksplane VP-1 · Brooksville, FL · Accident · Serious injuries · Limited investigation · Final report · Aug 10, 2015 · N9288 · Destroyed
  > The pilot's failure to abort the takeoff after determining that the engine was not producing adequate power. Contributing to the accident was the engine's inability to produce adequate power for reasons that could not be determined due to extensive postimpact…
- [NTSB WPR15LA235](https://openairdocs.org/ntsb/WPR15LA235.md): Cleveland Allan B Nieuport 11# · Bellingham, WA · Accident · Minor injuries · Limited investigation · Final report · Aug 7, 2015 · N917AB · Substantial damage
  > A partial loss of engine power for reasons that could not be determined because postaccident examination revealed no mechanical malfunctions or anomalies that would have precluded normal operation.
- [NTSB ANC15FA062](https://openairdocs.org/ntsb/ANC15FA062.md): Piper PA 18-150 · Chugiak, AK · Accident · 2 fatal · Field investigation · Final report · Aug 7, 2015 · N3675P · Substantial damage
  > The loss of engine power for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any mechanical malfunctions or failures that would have precluded normal operation.

Next page: https://openairdocs.org/ntsb-findings/05000000/cases.md?page=21

## 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=20

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