# 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 13 of 45 · 2,248 cases

## Cases, newest first

- [NTSB ANC18LA051](https://openairdocs.org/ntsb/ANC18LA051.md): Piper PA18 · Anchorage, AK · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 29, 2018 · N7675D · Substantial damage
  > The total loss of engine power due to fuel starvation for reasons that could not be determined, which resulted in impact with and subsequent sliding across terrain.
- [NTSB CEN18LA249](https://openairdocs.org/ntsb/CEN18LA249.md): Air Tractor AT502 · Tappen, ND · Accident · No injuries · Limited investigation · Final report · Jun 28, 2018 · N502S · Substantial damage
  > The partial loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB WPR18LA179](https://openairdocs.org/ntsb/WPR18LA179.md): Cessna 340A · Orlando, FL · Accident · No injuries · Limited investigation · Final report · Jun 25, 2018 · N60E · Substantial damage
  > The pilot's delayed decision to discontinue the takeoff when confronted with abnormal acceleration and airspeed indication; the reason for the abnormal acceleration could not be determined based on the available information.
- [NTSB CEN18LA239](https://openairdocs.org/ntsb/CEN18LA239.md): Sibila MH-1 · Beach City, OH · Accident · Serious injuries · Limited investigation · Final report · Jun 25, 2018 · N32KS · Substantial damage
  > The total loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB ERA18LA177](https://openairdocs.org/ntsb/ERA18LA177.md): Crawford RV-7 · Alexander City, AL · Accident · No injuries · Limited investigation · Final report · Jun 24, 2018 · N19MM · Destroyed
  > A total loss of engine power for reasons that could not be determined because examination of the engine revealed no evidence of any preimpact mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB CEN18FA235](https://openairdocs.org/ntsb/CEN18FA235.md): Ercoupe 415 D · Monmouth, IL · Accident · 2 fatal · Field investigation · Final report · Jun 24, 2018 · N94070 · Destroyed
  > A loss of engine power for reasons that could not be determined based on the available information.
- [NTSB ANC18FA050](https://openairdocs.org/ntsb/ANC18FA050.md): Piper PA 18-150 · Delta Junction, AK · Accident · 2 fatal · Field investigation · Final report · Jun 24, 2018 · N8664Y · Substantial damage
  > Undetermined based on the available evidence.
- [NTSB WPR18LA183](https://openairdocs.org/ntsb/WPR18LA183.md): Cessna 182 · Jacksonville, FL · Accident · No injuries · Limited investigation · Final report · Jun 23, 2018 · N5682B · Substantial damage
  > A total loss of engine power for reasons that could not be determined due to insufficient evidence.
- [NTSB CEN18LA237](https://openairdocs.org/ntsb/CEN18LA237.md): Zenith Stol CH701 · Maple Lake, MN · Accident · No injuries · Limited investigation · Final report · Jun 22, 2018 · N736MM · Substantial damage
  > The total loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB WPR18LA177](https://openairdocs.org/ntsb/WPR18LA177.md): Schempp Hirth Flugzeugbau Arcus M · Richfield, UT · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 21, 2018 · N16DN · Destroyed
  > An inflight loss of control and subsequent inflight breakup for reasons that could not be determined based on the available information.
- [NTSB WPR18LA174](https://openairdocs.org/ntsb/WPR18LA174.md): Cirrus Design SR22 · Aguila, AZ · Accident · Serious injuries · Class 3 · Limited · Final report · Jun 19, 2018 · N764CT · Destroyed
  > A total loss of engine power due to pre-ignition/detonation for reasons that could not be determined based on available information.
- [NTSB ERA18LA172](https://openairdocs.org/ntsb/ERA18LA172.md): Mooney M20J · Monroe, NC · Accident · No injuries · Limited investigation · Final report · Jun 19, 2018 · N201FD · Substantial damage
  > A loss of engine power for reasons that could not be determined based on the available information.
- [NTSB ERA18LA171](https://openairdocs.org/ntsb/ERA18LA171.md): Piper PA 30 · Vero Beach, FL · Accident · No injuries · Limited investigation · Final report · Jun 17, 2018 · N8674Y · Substantial damage
  > The collapse of all three landing gear for reasons that could not be determined because postaccident examination of the landing gear system revealed no evidence of any mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB ANC18LA079](https://openairdocs.org/ntsb/ANC18LA079.md): Cessna 172 · Fullerton, CA · Accident · No injuries · Class 3 · Limited · Final report · Jun 17, 2018 · N734RS · Substantial damage
  > The National Transportation Safety Board did not determine the probable cause of this event and does not plan to issue a report or open a public docket. The investigation of this event is being conducted under the jurisdiction of the Federal Bureau of…
- [NTSB WPR18LA173](https://openairdocs.org/ntsb/WPR18LA173.md): Piper PA 28-140 · Hartford, CT · Accident · No injuries · Class 3 · Limited · Final report · Jun 16, 2018 · N1782J · Substantial damage
  > A loss of engine power for undetermined reasons because postaccident examination of the engine and fuel system did not reveal any anomalies that would have precluded normal operation, which led to the pilot’s forced landing and subsequent runway overshoot and…
- [NTSB ERA18LA169](https://openairdocs.org/ntsb/ERA18LA169.md): Cessna 172D · Quinton, VA · Accident · Serious injuries · Class 3 · Limited · Final report · Jun 16, 2018 · N2777U · Substantial damage
  > A loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB CEN18LA225](https://openairdocs.org/ntsb/CEN18LA225.md): Rockwell International 112TC · Cheyenne, WY · Accident · No injuries · Limited investigation · Final report · Jun 14, 2018 · N4954W · Substantial damage
  > A loss of engine power for reasons that could not be determined because postaccident examination did not reveal any evidence of preimpact mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB CEN18LA223](https://openairdocs.org/ntsb/CEN18LA223.md): Aeronca 7BCM · Eureka Springs, AR · Accident · Serious injuries · Class 3 · Limited · Final report · Jun 14, 2018 · N9098C · Substantial damage
  > The pilot’s failure to maintain adequate airspeed following a partial loss of engine power after takeoff for undetermined reasons, which resulted in the airplane exceeding its critical angle of attack and an aerodynamic stall at a low altitude.
- [NTSB WPR18LA166](https://openairdocs.org/ntsb/WPR18LA166.md): Cessna 421C · Plant City, FL · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 11, 2018 · N13RF · Substantial damage
  > The pilot's delayed decision to abort the takeoff, which resulted in a runway overrun. Contributing to the accident was an engine anomaly for reasons that could not be determined based on the available information, and the pilot's failure to activate the…
- [NTSB CEN18LA219](https://openairdocs.org/ntsb/CEN18LA219.md): Aston Kinsey Tercel · Cokeville, WY · Accident · No injuries · Limited investigation · Final report · Jun 11, 2018 · N640BE · Substantial damage
  > The loss of gyrocopter control for reasons that could not be determined because postaccident examination of the gyrocopter revealed no mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB ERA18LA161](https://openairdocs.org/ntsb/ERA18LA161.md): Robinson Helicopter R44 II · Fort Morgan, AL · Accident · No injuries · Limited investigation · Final report · Jun 7, 2018 · N755KT · Substantial damage
  > A partial loss of engine power for reasons that could not be determined because postaccident engine examinations did not reveal any evidence of preimpact mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB WPR18LA164](https://openairdocs.org/ntsb/WPR18LA164.md): Bell 206 · Sanders, KY · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 5, 2018 · N518Z · Substantial damage
  > A partial loss of engine power for undetermined reasons, and a loss of main rotor rpm during the subsequent autorotation, which resulted in a hard landing.
- [NTSB CEN18LA207](https://openairdocs.org/ntsb/CEN18LA207.md): Cessna T210 · Clovis, NM · Accident · No injuries · Limited investigation · Final report · Jun 3, 2018 · N66ML · Substantial damage
  > The total loss of engine power for reasons that could not be determined because examination of the engine revealed no evidence of any preimpact mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB ANC18LA040](https://openairdocs.org/ntsb/ANC18LA040.md): Piper PA 18-150 · Wasilla, AK · Accident · Serious injuries · Limited investigation · Final report · Jun 2, 2018 · N624MW · Substantial damage
  > A total loss of engine power for reasons that could not be determined based on the available information.
- [NTSB WPR18LA152](https://openairdocs.org/ntsb/WPR18LA152.md): Mcdonnell Douglas Heli 369FF · Wikieup, AZ · Accident · No injuries · Class 3 · Limited · Final report · May 29, 2018 · N975BW · Substantial damage
  > A vibration of the helicopter for reasons that could not be determined based on the available information, which resulted in a forced landing and the main rotor contacting the tailboom.
- [NTSB ANC18LA039](https://openairdocs.org/ntsb/ANC18LA039.md): Cessna T182T · Yerington, NV · Accident · No injuries · Limited investigation · Final report · May 28, 2018 · N68AX · Substantial damage
  > Loss of directional control during landing for reasons that could not be determined based on the available evidence, which resulted in a runway excursion.
- [NTSB ERA18LA155](https://openairdocs.org/ntsb/ERA18LA155.md): Devries WM H Kitfox Sport · Taghkanic, NY · Accident · No injuries · Class 3 · Limited · Final report · May 26, 2018 · N47DV · Substantial damage
  > A total loss of engine power for reasons that could not be determined based on the available information.
- [NTSB CEN18FA192](https://openairdocs.org/ntsb/CEN18FA192.md): Beech D17S · Santa Fe, NM · Accident · 1 fatal · Field investigation · Final report · May 25, 2018 · N79091 · Substantial damage
  > The pilot's failure to maintain clearance from terrain for reasons that could not be determined based on the available information.
- [NTSB WPR18LA153](https://openairdocs.org/ntsb/WPR18LA153.md): Piper PA24 · San Jose, CA · Accident · No injuries · Limited investigation · Final report · May 21, 2018 · N244TW · Substantial damage
  > A landing gear retraction during the landing rollout for reasons that could not be determined based on the available evidence.
- [NTSB CEN18LA173](https://openairdocs.org/ntsb/CEN18LA173.md): Grumman American Avn. AA 1B · Hamilton, OH · Accident · Serious injuries · Limited investigation · Final report · May 15, 2018 · N6550L · Substantial damage
  > The loss of engine power during takeoff for reasons that could not be determined because postaccident examination revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB ANC18LA034](https://openairdocs.org/ntsb/ANC18LA034.md): Grumman TBM-3 · Fort Apache, AZ · Accident · Serious injuries · Class 3 · Limited · Final report · May 6, 2018 · N337VT · Destroyed
  > A partial loss of engine power for reasons that could not be determined based on the available information.
- [NTSB WPR18LA130](https://openairdocs.org/ntsb/WPR18LA130.md): Robinson Helicopter R22 Beta · Portland, OR · Accident · Serious injuries · Class 3 · Limited · Final report · May 2, 2018 · N7526S · Substantial damage
  > A hard landing for reasons that could not be determined based on the available information.
- [NTSB WPR18LA133](https://openairdocs.org/ntsb/WPR18LA133.md): Robinson Helicopter R44 II · Borrego Springs, CA · Accident · Minor injuries · Class 3 · Limited · Final report · Apr 30, 2018 · N423ML · Substantial damage
  > The loss of the helicopter’s drive system for reasons that could not be determined from the available evidence, which led to an autorotation that resulted in a hard landing and rollover on uneven sandy terrain.
- [NTSB WPR18LA128](https://openairdocs.org/ntsb/WPR18LA128.md): Grumman Acft ENG Cor-Schweizer G 164C · Maxwell, CA · Accident · No injuries · Class 3 · Limited · Final report · Apr 29, 2018 · N6674K · Substantial damage
  > A total loss of engine power due to an uncommanded closing of the fuel shutoff valve, which terminated fuel to the engine. The reason for the fuel shutoff valve’s closure could not be determined based on the available information.
- [NTSB WPR18LA136](https://openairdocs.org/ntsb/WPR18LA136.md): Cessna 182F · Boulder, UT · Accident · Minor injuries · Class 3 · Limited · Final report · Apr 28, 2018 · N3377U · Substantial damage
  > A partial loss of engine power for reasons that could not be determined due to the available evidence.
- [NTSB CEN18LA152](https://openairdocs.org/ntsb/CEN18LA152.md): Grumman G 164A · Garwood, TX · Accident · No injuries · Limited investigation · Final report · Apr 27, 2018 · N6637 · Substantial damage
  > A partial loss of engine power for reasons that could not be determined because postaccident examination of the engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB WPR18LA127](https://openairdocs.org/ntsb/WPR18LA127.md): Yakovlev YAK 52 · Hillsboro, OR · Accident · Serious injuries · Limited investigation · Final report · Apr 26, 2018 · N2YK · Substantial damage
  > A partial loss of engine power during cruise flight for reasons that could not be determined because postaccident examination did not reveal any mechanical malfunctions or failures that would have precluded normal operation. Contributing to the accident was…
- [NTSB WPR18LA125](https://openairdocs.org/ntsb/WPR18LA125.md): Bellanca 7GCBC · Andover, NJ · Accident · Serious injuries · Class 3 · Limited · Final report · Apr 23, 2018 · N8737V · Substantial damage
  > A partial loss of engine power for undetermined reasons.
- [NTSB CEN18FA140](https://openairdocs.org/ntsb/CEN18FA140.md): Bordiuk Challenger II · Friona, TX · Accident · 2 fatal · Field investigation · Final report · Apr 16, 2018 · N635DT · Substantial damage
  > An in-flight impact with terrain for reasons that could not be determined due to a lack of evidence.
- [NTSB CEN18FA139](https://openairdocs.org/ntsb/CEN18FA139.md): Wittman W10 · San Antonio, TX · Accident · 1 fatal · Field investigation · Final report · Apr 15, 2018 · N625JS · Destroyed
  > An in-flight fire and subsequent total loss of engine power for reasons that could not be determined due to extensive impact and fire damage, followed by a loss of airplane control.
- [NTSB CEN18LA138](https://openairdocs.org/ntsb/CEN18LA138.md): Piper PA 24 · New Braunfels, TX · Accident · Minor injuries · Limited investigation · Final report · Apr 12, 2018 · N7386P · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on the available information.
- [NTSB ERA18FA118](https://openairdocs.org/ntsb/ERA18FA118.md): Cessna R182 · Ashville, AL · Accident · 1 fatal · Field investigation · Final report · Mar 28, 2018 · N3167C · Destroyed
  > Descent and impact with terrain for reasons that could not be determined.
- [NTSB ERA18LA107](https://openairdocs.org/ntsb/ERA18LA107.md): Cessna 177 · Key West, FL · Accident · Minor injuries · Limited investigation · Final report · Mar 15, 2018 · N713CX · Substantial damage
  > A partial loss of engine power during initial climb for reasons that could not be determined because examination of the wreckage did not reveal any evidence of preimpact malfunctions or failures that would have precluded normal operation.
- [NTSB WPR18LA105](https://openairdocs.org/ntsb/WPR18LA105.md): Piper PA 28-180 · Montague, CA · Accident · No injuries · Class 3 · Limited · Final report · Mar 11, 2018 · N6611J · Substantial damage
  > Impact with powerlines and terrain after takeoff for reasons that could not be determined based on the available information.
- [NTSB CEN18FA116](https://openairdocs.org/ntsb/CEN18FA116.md): Piper PA 31P · Laredo, TX · Accident · 2 fatal · Field investigation · Final report · Mar 8, 2018 · N82605 · Destroyed
  > An engine malfunction for undetermined reasons and the subsequent loss of control, due to the pilot's improper decision to maneuver the airplane below minimum controllable airspeed and his improper response to the loss of engine power.
- [NTSB CEN18LA115](https://openairdocs.org/ntsb/CEN18LA115.md): Messerschmitt-Bolkow-Blohm BK 117 B-2 · Sheboygan, WI · Accident · No injuries · Limited investigation · Final report · Mar 5, 2018 · N1174U · Substantial damage
  > The restricted cyclic control movement for reasons that could not be determined because postaccident examination and testing of the cyclic control system did not reveal any evidence of mechanical malfunctions or failures that would have precluded normal…
- [NTSB ERA18LA094](https://openairdocs.org/ntsb/ERA18LA094.md): Cessna 172 · Ocean City, MD · Accident · 2 fatal · Limited investigation · Final report · Mar 1, 2018 · N615JA · Destroyed
  > The pilot's flight in dark night visual meteorological conditions, which resulted in an impact with water for reasons that could not be determined based on the available information.
- [NTSB ERA18FA088](https://openairdocs.org/ntsb/ERA18FA088.md): Air Tractor AT-802 · Greenwood, MS · Accident · 1 fatal · Field investigation · Final report · Feb 26, 2018 · N581LA · Substantial damage
  > The pilot's failure to maintain clearance from a tree for reasons that could not be determined based on the available evidence.
- [NTSB CEN18FA108](https://openairdocs.org/ntsb/CEN18FA108.md): Beech 58 · Ulysses, KS · Accident · 2 fatal · Field investigation · Final report · Feb 23, 2018 · N678DD · Destroyed
  > An inflight loss of control and collision with terrain for reasons that could not be determined.
- [NTSB CEN18FA107](https://openairdocs.org/ntsb/CEN18FA107.md): Cessna 441 · Rossville, IN · Accident · 3 fatal · Field investigation · Final report · Feb 23, 2018 · N771XW · Destroyed
  > An in-flight loss of control for reasons that could not be determined based on the available evidence.

Next page: https://openairdocs.org/ntsb-findings/05000000/cases.md?page=14

## 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=13

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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, except the copies of manufacturers’ service documents, which belong to their rights holders.