# 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 22 of 45 · 2,248 cases

## Cases, newest first

- [NTSB ERA15LA197](https://openairdocs.org/ntsb/ERA15LA197.md): James Kilroy Pitts Model 12 · LaGrange, GA · Accident · Serious injuries · Limited investigation · Final report · Apr 22, 2015 · N488WT · Substantial damage
  > A partial loss of engine power after 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 ERA15FA191](https://openairdocs.org/ntsb/ERA15FA191.md): Mooney M20TN · Lakeland, FL · Accident · Serious injuries · Field investigation · Final report · Apr 20, 2015 · N608MR · Substantial damage
  > The total loss of engine power for reasons that could not be determined due to thermal damage and because postaccident examination of the engine revealed no anomalies that would have precluded normal operation.
- [NTSB ERA15LA189](https://openairdocs.org/ntsb/ERA15LA189.md): Cessna LC41-550FG · Titusville, FL · Accident · No injuries · Limited investigation · Final report · Apr 18, 2015 · N400BZ · Substantial damage
  > An inflight fire and a total loss of engine power due to oil starvation, after separation of the No. 3 cylinder exhaust valve rocker box cover for reasons that could not be determined based on the available information.
- [NTSB ERA15LA201](https://openairdocs.org/ntsb/ERA15LA201.md): Universal Stinson 108-1 · Macon, MS · Accident · No injuries · Limited investigation · Final report · Apr 16, 2015 · N9799G · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on the available information.
- [NTSB ERA15LA187](https://openairdocs.org/ntsb/ERA15LA187.md): Piper PA-28-140 · Lancaster, NY · Accident · No injuries · Limited investigation · Final report · Apr 15, 2015 · N7598R · Substantial damage
  > The loss of engine power during takeoff for reasons that could not be determined during postaccident examination of the engine or testing of the carburetor.
- [NTSB CEN15LA204](https://openairdocs.org/ntsb/CEN15LA204.md): Grumman G 164A · Maysville, OK · Accident · Minor injuries · Limited investigation · Final report · Apr 15, 2015 · N7951 · 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 CEN15LA198](https://openairdocs.org/ntsb/CEN15LA198.md): Robinson Helicopter R44 II · Dunlap, IL · Accident · No injuries · Limited investigation · Final report · Apr 15, 2015 · N754R · Substantial damage
  > A loss of main rotor rpm for reasons that could not be determined during postaccident examinations.
- [NTSB ANC15LA020](https://openairdocs.org/ntsb/ANC15LA020.md): Cessna 170B · Bettles, AK · Accident · No injuries · Limited investigation · Final report · Apr 13, 2015 · N4697C · Substantial damage
  > A total loss of engine power for reasons that could not be determined because postaccident engine examination and testing revealed no mechanical anomalies that would have precluded normal operation.
- [NTSB ERA15FA181](https://openairdocs.org/ntsb/ERA15FA181.md): Piper PA-31T1 · Fort Lauderdale, FL · Accident · 4 fatal · Field investigation · Final report · Apr 12, 2015 · N119RL · Destroyed
  > A rapid onset of smoke and/or fire inflight for reasons that could not be determined due to the postimpact fire and the condition of the wreckage.
- [NTSB ERA15LA328](https://openairdocs.org/ntsb/ERA15LA328.md): Gulfstream Aerospace G IV · Caribbean Sea, A1 · Accident · No injuries · Limited investigation · Final report · Apr 10, 2015 · N450KK · Substantial damage
  > The in-flight failure of the cabin pressurization relief/safety valve (CPRV) due to an obstruction of the CPRV static port, which allowed the airplane to overpressurize. The reason for the initial overpressurization condition could not be determined.
- [NTSB ERA15LA177](https://openairdocs.org/ntsb/ERA15LA177.md): Mooney M20J · Allentown, PA · Accident · No injuries · Limited investigation · Final report · Apr 6, 2015 · N4826H · Substantial damage
  > A total loss of engine power during takeoff due to an interruption of fuel flow to the engine. The reason for the interruption of the fuel flow could not be determined during postaccident examination and testing.
- [NTSB WPR15LA139](https://openairdocs.org/ntsb/WPR15LA139.md): Beech H35 · Tucson, AZ · Accident · No injuries · Limited investigation · Final report · Mar 30, 2015 · N112F · Substantial damage
  > A partial loss of engine power during initial takeoff climb for reasons that could not be determined because postaccident examination revealed no evidence of a mechanical anomaly that would have precluded normal operation.
- [NTSB ERA15FA173](https://openairdocs.org/ntsb/ERA15FA173.md): Bell Helicopter Textron 206 L-1 · Saucier, MS · Accident · 2 fatal · Field investigation · Final report · Mar 30, 2015 · N50KH · Destroyed
  > A loss of engine power for reasons that could not be determined due to postaccident fire damage.
- [NTSB WPR15LA138](https://openairdocs.org/ntsb/WPR15LA138.md): Hiller UH 12E · Firebaugh, CA · Accident · No injuries · Limited investigation · Final report · Mar 29, 2015 · N130HA · Substantial damage
  > A 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 CEN15LA185](https://openairdocs.org/ntsb/CEN15LA185.md): Giackino Donald W Rotorway 162F · Marquette, MI · Accident · No injuries · Limited investigation · Final report · Mar 28, 2015 · N556DG · Substantial damage
  > The loss of helicopter control for reasons that could not be determined based on the available evidence.
- [NTSB CEN15LA206](https://openairdocs.org/ntsb/CEN15LA206.md): Piper PA 32R-301T · Stephenville, TX · Accident · Serious injuries · Limited investigation · Final report · Mar 27, 2015 · N9284 · Substantial damage
  > The partial loss of engine power after takeoff for undetermined reasons, which necessitated a forced landing, during which the airplane impacted trees and a power line.
- [NTSB ERA15LA179](https://openairdocs.org/ntsb/ERA15LA179.md): Bell 206B · Taylors Island, MD · Accident · No injuries · Limited investigation · Final report · Mar 24, 2015 · N43CM · 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 GAA15CA018](https://openairdocs.org/ntsb/GAA15CA018.md): Cessna 172S · Camarillo, CA · Accident · No injuries · Data collection · Final report · Mar 23, 2015 · N2104H · Substantial damage
  > The pilot involved and the phase of flight when the damage occurred were not determined.
- [NTSB CEN15LA179](https://openairdocs.org/ntsb/CEN15LA179.md): Picard Roy J RV 4 · Marathon, TX · Accident · Serious injuries · Limited investigation · Final report · Mar 23, 2015 · N945RV · Substantial damage
  > A total loss of engine power for reasons that could not be determined because postaccident examination of the airplane revealed no evidence of any mechanical anomalies that would have precluded normal operation.
- [NTSB WPR15LA131](https://openairdocs.org/ntsb/WPR15LA131.md): Mccurry Charles P F 1 Rocket · Sedona, AZ · Accident · Serious injuries · Limited investigation · Final report · Mar 21, 2015 · N747MC · Substantial damage
  > The partial loss of engine power during final approach for reasons that could not be determined during postaccident examination of the engine.
- [NTSB ERA15LA155](https://openairdocs.org/ntsb/ERA15LA155.md): Richard Fuist Rotorway Talon · Indian Lake Estates, FL · Accident · Minor injuries · Limited investigation · Final report · Mar 14, 2015 · N220AF · Substantial damage
  > A loss of helicopter control following an uncommanded increased left cyclic pressure during landing for reasons that could not be determined because postaccident examination of the helicopter revealed no evidence of any mechanical malfunctions or anomalies.
- [NTSB CEN15LA170](https://openairdocs.org/ntsb/CEN15LA170.md): Maule M 7-260C · Oregon, MO · Accident · No injuries · Limited investigation · Final report · Mar 10, 2015 · N55000 · Substantial damage
  > Engine vibration for reasons that could not be determined based on the available evidence.
- [NTSB GAA15LA019](https://openairdocs.org/ntsb/GAA15LA019.md): Aeronca 7AC · Garrison, IA · Accident · No injuries · Limited investigation · Final report · Mar 9, 2015 · N83643 · Substantial damage
  > The malfunction of the right brake for reasons that could not be determined because postaccident examination revealed no anomalies that would have precluded normal operation.
- [NTSB ERA15LA151](https://openairdocs.org/ntsb/ERA15LA151.md): Piper PA23 · San Juan, PR · Accident · No injuries · Limited investigation · Final report · Mar 9, 2015 · N1153P · Substantial damage
  > The total loss of right engine power 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 WPR15LA127](https://openairdocs.org/ntsb/WPR15LA127.md): Jimenez Vans RV 7A · Dayton, NV · Accident · Minor injuries · Limited investigation · Final report · Mar 8, 2015 · N51MJ · Substantial damage
  > A loss of engine power during descent for reasons that could not be determined because postaccident examination of the engine revealed no anomalies that would have precluded normal operation.
- [NTSB CEN15LA169](https://openairdocs.org/ntsb/CEN15LA169.md): Hoke Bobby F Rans S 12 · Rusk, TX · Accident · Serious injuries · Limited investigation · Final report · Mar 7, 2015 · N154BH · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on the available information. Contributing to the accident was the pilot's failure to maintain control while maneuvering for a forced landing, which resulted in the airplane…
- [NTSB ERA15LA145](https://openairdocs.org/ntsb/ERA15LA145.md): Cessna 152 · Venice, FL · Accident · Minor injuries · Limited investigation · Final report · Mar 3, 2015 · N498TC · Substantial damage
  > A total loss of engine power for reasons that could not be determined because postaccident testing of the engine revealed no anomalies.
- [NTSB ERA15FA141](https://openairdocs.org/ntsb/ERA15FA141.md): Colyaer SL Freedom · Boynton Beach, FL · Accident · 2 fatal · Field investigation · Final report · Mar 2, 2015 · N787Z · Destroyed
  > An in-flight loss of control for reasons that could not be determined based on the available evidence.
- [NTSB ERA15FA139](https://openairdocs.org/ntsb/ERA15FA139.md): Adams Donald L DA1 · Sebring, FL · Accident · 1 fatal · Field investigation · Final report · Mar 2, 2015 · N797A · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB WPR15LA137](https://openairdocs.org/ntsb/WPR15LA137.md): Piper PA 46-310P · Redmond, OR · Accident · No injuries · Limited investigation · Final report · Mar 1, 2015 · N9133G · Substantial damage
  > A loss of engine power during cruise flight 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 ERA15LA140](https://openairdocs.org/ntsb/ERA15LA140.md): Bombardier Canadair CL600-2A12 · Marco Island, FL · Accident · Serious injuries · Limited investigation · Final report · Mar 1, 2015 · N600NP · Substantial damage
  > The failure of a spring inside the No. 2 brake’s upper brake control valve and the fracture of the coupling subassembly of the No. 1 wheel speed sensor during landing, which resulted in the loss of braking action, and the pilot-in-command’s (PIC) deactivation…
- [NTSB ERA15LA142](https://openairdocs.org/ntsb/ERA15LA142.md): Piper PA28 · Jacksonville, FL · Accident · No injuries · Limited investigation · Final report · Feb 27, 2015 · N2122K · Substantial damage
  > The total loss of engine power due to carburetor ice.
- [NTSB WPR15LA106](https://openairdocs.org/ntsb/WPR15LA106.md): Grumman Acft ENG Cor-Schweizer G 164A · Alfalfa, OR · Accident · No injuries · Limited investigation · Final report · Feb 18, 2015 · N4863 · Substantial damage
  > A total loss of engine power after takeoff for reasons that could not be determined, because examination of the engine did not reveal any mechanical anomalies that would have precluded normal operation.
- [NTSB CEN15LA147](https://openairdocs.org/ntsb/CEN15LA147.md): Piper PA 31-350 · Chicago, IL · Accident · No injuries · Limited investigation · Final report · Feb 16, 2015 · N727SC · Substantial damage
  > The collapse of the nose and right main landing gears during landing for reasons that could not be determined because examination of the landing gear system revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB WPR15LA113](https://openairdocs.org/ntsb/WPR15LA113.md): Mooney M20E - NO Series · Bakersfield, CA · Accident · No injuries · Limited investigation · Final report · Feb 14, 2015 · N11LV · Substantial damage
  > The collapse of all three landing gear during the takeoff roll for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation.
- [NTSB CEN15FA141](https://openairdocs.org/ntsb/CEN15FA141.md): Richard Lacourse Wheeler Express · Kersey, CO · Accident · 2 fatal · Field investigation · Final report · Feb 11, 2015 · N564ER · Destroyed
  > The pilot's failure to maintain airplane control during an off-airport forced landing following a total loss of engine power for reasons that could not be determined during postaccident examination of the engine. Contributing to the accident was the pilots'…
- [NTSB ANC15LA011](https://openairdocs.org/ntsb/ANC15LA011.md): Cessna 180 · Glennallen, AK · Accident · No injuries · Limited investigation · Final report · Feb 9, 2015 · N9280C · Substantial damage
  > An in-flight fire and a partial loss of engine power for reasons that could not be determined based on the available information.
- [NTSB WPR15LA096](https://openairdocs.org/ntsb/WPR15LA096.md): Robinson Helicopter R44 II · Calexico, CA · Accident · No injuries · Limited investigation · Final report · Feb 1, 2015 · N510KJ · Substantial damage
  > A partial loss of engine power 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 WPR15LA092](https://openairdocs.org/ntsb/WPR15LA092.md): Alexander RV-7 · Seabeck, WA · Accident · 1 fatal · Limited investigation · Final report · Jan 26, 2015 · N747BA · Destroyed
  > A loss of airplane control for reasons that could not be determined because the airplane impacted water, and the majority of the wreckage was not recovered.
- [NTSB WPR15LA089](https://openairdocs.org/ntsb/WPR15LA089.md): Cirrus SR22 - NO Series · Maui (Pacific Ocean) · Accident · No injuries · Limited investigation · Final report · Jan 26, 2015 · N7YT · Substantial damage
  > The pilot's inability to transfer fuel from the aft auxiliary fuel tank to the main fuel tanks for reasons that could not be determined because the airplane was ditched and not recovered.
- [NTSB WPR15CA091](https://openairdocs.org/ntsb/WPR15CA091.md): Cessna 172N · Makaha, HI · Accident · Minor injuries · Data collection · Final report · Jan 26, 2015 · N422BP · Substantial damage
  > A partial loss of engine power for reasons that could not be determined because the airplane was ditched and not recovered.
- [NTSB WPR15LA090](https://openairdocs.org/ntsb/WPR15LA090.md): Cessna 150E · Silver Springs, NV · Accident · Minor injuries · Limited investigation · Final report · Jan 25, 2015 · N4017U · Substantial damage
  > The loss of engine power for reasons that could not be determined during a postaccident examination of the airplane.
- [NTSB ERA15FA109](https://openairdocs.org/ntsb/ERA15FA109.md): Piper PA-23 · Lakeland, FL · Accident · 2 fatal · Field investigation · Final report · Jan 22, 2015 · N465JA · Destroyed
  > An in-flight loss of control for reasons that could not be determined during postaccident investigation; the loss of control likely occurred during a simulated loss of power in the right engine during an instructional flight.
- [NTSB WPR15FA088](https://openairdocs.org/ntsb/WPR15FA088.md): Beech 36 · Mountain Pass, CA · Accident · 2 fatal · Field investigation · Final report · Jan 21, 2015 · N999CJ · Destroyed
  > An in-flight loss of control for reasons that could not be determined based on available information.
- [NTSB WPR15LA087](https://openairdocs.org/ntsb/WPR15LA087.md): Piper PA 28-140 · Helena, MT · Accident · Minor injuries · Limited investigation · Final report · Jan 20, 2015 · N4666R · Substantial damage
  > Loss of engine power after takeoff for reasons that could not be determined because postaccident examination did not reveal any evidence of an anomaly that would have precluded normal operation.
- [NTSB WPR15LA086](https://openairdocs.org/ntsb/WPR15LA086.md): Cessna 172N · Ualapue, HI · Accident · Serious injuries · Limited investigation · Final report · Jan 17, 2015 · N5660E · Substantial damage
  > A partial loss of engine power during cruise flight for reasons that could not be determined because the airplane was not recovered.
- [NTSB CEN15LA114](https://openairdocs.org/ntsb/CEN15LA114.md): Cessna 150G · Pontiac, IL · Accident · Minor injuries · Limited investigation · Final report · Jan 9, 2015 · N2871S · Substantial damage
  > The flight instructor’s loss of directional control during an attempted go-around with a crosswind. Contributing to the accident was the loss of engine power for reasons that could not be determined during examination of the engine.
- [NTSB ERA15LA094](https://openairdocs.org/ntsb/ERA15LA094.md): Cessna 172 · Norfolk, VA · Accident · No injuries · Limited investigation · Final report · Jan 6, 2015 · N2102P · Substantial damage
  > The engine’s failure to regain full power after a simulated engine failure for reasons that could not be determined during postaccident examinations and testing.
- [NTSB ERA15LA090](https://openairdocs.org/ntsb/ERA15LA090.md): Cessna P206 · Key West, FL · Accident · Minor injuries · Limited investigation · Final report · Jan 3, 2015 · N2534X · Substantial damage
  > A total loss of engine power for reasons that could not be determined during postaccident examinations and testing.
- [NTSB WPR15TA071](https://openairdocs.org/ntsb/WPR15TA071.md): MD Helicopter 369FF · Las Vegas, NV · Accident · Serious injuries · Final report · Dec 31, 2014 · N530KK · Substantial damage
  > A total loss of engine power during cruise flight for reasons that could not be determined because postaccident examination and testing did not reveal any anomalies that would have precluded normal operation.

Next page: https://openairdocs.org/ntsb-findings/05000000/cases.md?page=23

## 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=22

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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.