# NTSB investigations: Unknown or undetermined

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 32 of 35 · 1,713 cases

## Cases, newest first

- [NTSB WPR12WA446](https://openairdocs.org/ntsb/WPR12WA446.md): Hughes 369D · Lake Sumner, New Zealand, New Zealand · Accident · 1 fatal · Foreign investigation · May 21, 2012 · ZK-HXZ · Substantial damage
  > On May 21, 2012, at 0200 universal coordinated time, a Hughes 369D, ZK-HXZ, registered to and operated by Way to Go Heliservices, crashed into Lake Sumner, New Zealand, under unknown circumstances. The helicopter sank in 125 meters of water and was not…
- [NTSB ERA12WA372](https://openairdocs.org/ntsb/ERA12WA372.md): Cessna 182 · Veronica, Argentina · Accident · 1 fatal · Foreign investigation · May 19, 2012 · LV-GTF · Substantial damage
  > On May 19, 2012, about 2140 universal coordinated time, a Cessna 182C, Argentina registration LV-GTF, was substantially damaged when it impacted terrain during a missed approach at Veronica Airfield, Veronica, Buenos Aires, Argentina. The foreign certificated…
- [NTSB DCA12WA085](https://openairdocs.org/ntsb/DCA12WA085.md): Boeing 737 · Riga, Latvia · Incident · No injuries · Foreign investigation · May 19, 2012 · YL-BBN · No damage
  > On May 19, 2012, at approximately 0819 locat time, a Boeing 737-500 operated by AirBaltic was climbing after departure from Riga International Airport, and was cleared by ATC to climb to FL230. At the same time, an Airbus 320, operated by Aeroflot perfromed a…
- [NTSB WPR12FA216](https://openairdocs.org/ntsb/WPR12FA216.md): Aero Vodochody L-39 · Boulder City, NV · Accident · 2 fatal · Field investigation · Final report · May 18, 2012 · N39WT · Substantial damage
  > An in-flight emergency followed by a collision with terrain for reasons that could not be determined because postaccident examination of the airframe, engine, and forward and aft canopies revealed no evidence of mechanical malfunctions or failures that would…
- [NTSB DCA12WA074](https://openairdocs.org/ntsb/DCA12WA074.md): Dornier 228 · Jomson, Nepal · Accident · No injuries · Foreign investigation · May 14, 2012 · 9N-AIG · Destroyed
  > The Nepal Civil Aviation Authority (NCAA) has notified the NTSB of an accident involving a DO-228 that occurred on May 14, 2012. The NTSB has appointed a U.S. Accredited Representative to assist the NCAA investigation under the provisions of ICAO Annex 13 as…
- [NTSB WPR12TA445](https://openairdocs.org/ntsb/WPR12TA445.md): Beech C90 · Boise, ID · Accident · No injuries · Final report · May 10, 2012 · N14CP · Substantial damage
  > Excessive loading on the left wing, which occurred over a period of time. Contributing to the accident was maintenance personnel’s failure to adequately inspect and document the left wing damage.
- [NTSB ERA12WA353](https://openairdocs.org/ntsb/ERA12WA353.md): Embraer EMB712 · Morro do Manduba Guaruja, Brazil · Accident · 2 fatal · Foreign investigation · Apr 26, 2012 · PT-NUH · Substantial damage
  > On April 26, 2012, about 1845 Universal Coordinated Time (UTC), an Embraer 712, Brazilian registration PT-NUH, operated by the Aeroclube de Itanhaem, crashed under unknown circumstances in a dense forest area in Morro do Manduba Guaruja Municipality, Sao…
- [NTSB CEN12FA251](https://openairdocs.org/ntsb/CEN12FA251.md): Cirrus Design SR22 · Newcomerstown, OH · Accident · 1 fatal · Field investigation · Final report · Apr 21, 2012 · N110EB · Substantial damage
  > The pilot’s loss of airplane control in instrument meteorological conditions due to his distraction by electrical system anomalies, which resulted in an uncontrolled descent. The reason for the electrical system anomalies could not be determined.
- [NTSB ERA12LA290](https://openairdocs.org/ntsb/ERA12LA290.md): Cessna 421C · Accident · 1 fatal · Limited investigation · Final report · Apr 19, 2012 · N48DL · Substantial damage
  > Pilot incapacitation, which resulted in the pilot’s inability to maintain airplane control and the airplane’s subsequent ocean impact.
- [NTSB WPR12LA160](https://openairdocs.org/ntsb/WPR12LA160.md): Cessna 150H · Kent, WA · Accident · Serious injuries · Limited investigation · Final report · Apr 7, 2012 · N6616S · Substantial damage
  > The pilot’s failure to maintain airplane control while maneuvering in the traffic pattern, which resulted in a collision with trees.
- [NTSB ERA12WA298](https://openairdocs.org/ntsb/ERA12WA298.md): Agusta A119 · Leningradsky, Russia · Accident · 4 fatal · Foreign investigation · Apr 6, 2012 · RA-01980 · Substantial damage
  > On April 6, 2012, about 1240 Universal Coordinated Time (UTC), an AgustaWestland S.p.A., A119 helicopter, Russian registration RA-01980, crashed onto a frozen lake (Yanisyarvi), Sortavalsk district, Leningradsky region, about 5 KM from camp Chernye Kamni,…
- [NTSB DCA12WA055](https://openairdocs.org/ntsb/DCA12WA055.md): ATR ATR72 · Roshchino, Russia · Accident · No injuries · Foreign investigation · Apr 2, 2012 · VP-BYZ · Destroyed
  > The Russian Interstate Aviation Committee (MAK) has notified the NTSB of an accident involving an ATR-72 that occurred on April 2, 2012. The NTSB has appointed a U.S. Accredited Representative to assist the MAK investigation under the provisions of ICAO Annex…
- [NTSB ERA12WA249](https://openairdocs.org/ntsb/ERA12WA249.md): Beech 300 · Puerto Aguiree, Chile · Accident · 8 fatal · Foreign investigation · Mar 22, 2012 · CC-AEB · Destroyed
  > On March 22, 2012, at 0358 UTC, a Beech BE 300, Chilean registration CC-AEB registered to Banco Popular Espanol, S.A. and operated by Inaer Helicopter Chile SA as an air ambulance flight, departed controlled flight at Flight level 280 while in radio contact…
- [NTSB ERA12WA221](https://openairdocs.org/ntsb/ERA12WA221.md): Piper PA-34 · Belém, Brazil · Accident · 3 fatal · Foreign investigation · Feb 25, 2012 · PR-LAB · Substantial damage
  > On February 25, 2012, about 1150 coordinated universal time, a Piper PA-34-220T, Brazilian registration PR-LAB, was substantially damaged when it impacted terrain shortly after departure from Belém-Brigadeiro Protásio de Oliveira Airport (SBJC), Belém,…
- [NTSB ERA12FA175](https://openairdocs.org/ntsb/ERA12FA175.md): Cessna T182T · Lebanon, NH · Accident · 1 fatal · Field investigation · Final report · Feb 9, 2012 · N6062E · Substantial damage
  > The pilot’s failure to maintain airspeed during a return to the airport after takeoff, which resulted in an aerodynamic stall and loss of airplane control.
- [NTSB ERA12FA149](https://openairdocs.org/ntsb/ERA12FA149.md): Aero Vodochody L39C · Rainbow City, AL · Accident · 1 fatal · Field investigation · Final report · Jan 21, 2012 · N16RZ · Substantial damage
  > An in-flight loss of control in instrument meteorological conditions.
- [NTSB ERA12LA150](https://openairdocs.org/ntsb/ERA12LA150.md): M-Squared Breese 2 · Bayou La Batre, AL · Accident · No injuries · Limited investigation · Final report · Jan 19, 2012 · N582MS · Substantial damage
  > The pilot's inability to maintain control of the airplane for reasons that could not be determined because postaccident examination of the rudder control system did not reveal any anomalies that would have precluded control of the airplane.
- [NTSB CEN12WA138](https://openairdocs.org/ntsb/CEN12WA138.md): Piper PA-31-235 · Powys, Wales, United Kingdom, United Kingdom · Accident · No injuries · Foreign investigation · Jan 18, 2012 · G-BWHF · Substantial damage
  > On January 18, 2012, about 1145 universal time (UTC), a United Kingdom registered Piper PA-31-235, G-BWHF, sustained substantial damage when it impacted terrain near Leighton Welshpool, Powys, Wales, United Kingdom. The pilot and the passenger were fatally…
- [NTSB CEN12FA072](https://openairdocs.org/ntsb/CEN12FA072.md): Piper PA-28-180 · Perryville, AR · Accident · 4 fatal · Field investigation · Final report · Nov 17, 2011 · N7746W · Substantial damage
  > The pilot's loss of control in flight.
- [NTSB ERA12IA060](https://openairdocs.org/ntsb/ERA12IA060.md): Cessna 550 · Key West, FL · Incident · No injuries · Incident investigation · Final report · Nov 3, 2011 · N938D · Minor damage
  > The pilots’ failure to appropriately apply the landing gear wheel brakes after landing, to properly perform the hard brake pedal-no braking condition procedure following the reported brake failure and to apply the emergency brakes. The reason for the reported…
- [NTSB ERA12FA057](https://openairdocs.org/ntsb/ERA12FA057.md): Eckenrode Carl J Vans RV-6 · Taylorsville, GA · Accident · 1 fatal · Field investigation · Final report · Nov 1, 2011 · N262MA · Substantial damage
  > The airplane's entry into an uncontrolled descent for reasons that could not be determined because postaccident examination of the airplane and the pilot’s medical history did not reveal any anomalies that would have precluded normal operation.
- [NTSB CEN12LA047](https://openairdocs.org/ntsb/CEN12LA047.md): Saber Trike unk · Okmulgee, OK · Accident · Serious injuries · Limited investigation · Final report · Oct 15, 2011 · UNREG · Substantial damage
  > The in-flight collision with electrical wires for undetermined reasons.
- [NTSB ERA12FA051](https://openairdocs.org/ntsb/ERA12FA051.md): Cessna 150F · Moncks Corner, SC · Accident · 1 fatal · Field investigation · Final report · Oct 13, 2011 · N3086X · Substantial damage
  > The debilitating effects of ethylene glycol poisoning, which resulted in the pilot’s inability to maintain control of the airplane.
- [NTSB CEN12FA001](https://openairdocs.org/ntsb/CEN12FA001.md): Robinson Helicopter R66 · Philip, SD · Accident · 1 fatal · Field investigation · Final report · Oct 1, 2011 · N266CY · Destroyed
  > The in-flight separation of the main rotor mast following a mast bumping event. The reason for the mast bumping event could not be determined due to postaccident damage.
- [NTSB DCA11WA108](https://openairdocs.org/ntsb/DCA11WA108.md): Aviocar CASA C212 · Aceh, Indonesia · Accident · 18 fatal · Foreign investigation · Sep 29, 2011 · PK-TLF · Substantial damage
  > The National Transportation Safety Committee of Indonesia (KNKT) has notified the NTSB of an accident involving a Aviocar CASA C212 that occurred on September 29, 2011. The NTSB has appointed a U.S. Accredited Representative to assist the KNKT investigation…
- [NTSB WPR11WA476](https://openairdocs.org/ntsb/WPR11WA476.md): Bell 412SP · Mataram, West Nusa, Indonesia · Accident · 2 fatal · Foreign investigation · Sep 25, 2011 · PK-OVC · Substantial damage
  > On September 25, 2011, at 1341 local time (0541 UTC) a Bell Helicopter 412SP, Indonesia registry PK-OVC, crashed in a jungle under unknown circumstances 150 kilometers east of Selaparang Airport, Mataram, West Nusa Tenggara, Indonesia. The Helicopter was…
- [NTSB DCA11WA099](https://openairdocs.org/ntsb/DCA11WA099.md): Airbus A320 · Cusco, Peru · Incident · No injuries · Foreign investigation · Sep 19, 2011 · N493TA · No damage
  > On September 19, 2011, at 1620 UTC, an Airbus A320-233, N493TA, experienced smoke in the cockpit. The airplane landed uneventfully at Alejandro Velasco Astete International Airport (SPZO), Peru, its original destination. None of the passengers or crewmembers…
- [NTSB CEN11WA639](https://openairdocs.org/ntsb/CEN11WA639.md): Piper PA-31P · Ciudad Apodaca, Mexico · Accident · 2 fatal · Foreign investigation · Sep 12, 2011 · N69DJ · Destroyed
- [NTSB ERA11WA509](https://openairdocs.org/ntsb/ERA11WA509.md): Robinson R44 · Rio de Janeriro, Brazil · Accident · 2 fatal · Foreign investigation · Sep 10, 2011 · PR-CEC · Substantial damage
  > On September 10, 2011, about 2330 universal coordinated time, a Robinson R44 II, Brazilian registration PR-CEC, was substantially damaged when it impacted wooded terrain during an aerial photography flight, near Rio de Janeiro, Brazil. The foreign…
- [NTSB WPR11FA429](https://openairdocs.org/ntsb/WPR11FA429.md): Brewster LONG-EZ · Kanab, UT · Accident · 1 fatal · Field investigation · Final report · Sep 4, 2011 · N9DZ · Substantial damage
  > The pilot's loss of airplane control during cruise flight.
- [NTSB CEN11WA603](https://openairdocs.org/ntsb/CEN11WA603.md): Cessna TU206G · Sioux Lookout, Canada · Accident · 1 fatal · Foreign investigation · Aug 29, 2011 · N242SA · Substantial damage
- [NTSB CEN11CA662](https://openairdocs.org/ntsb/CEN11CA662.md): Piper PA-30 · Saguache, CO · Accident · No injuries · Data collection · Final report · Aug 26, 2011 · N75BA · Substantial damage
  > The pilot's failure to maintain airplane control during the aborted takeoff.
- [NTSB CEN11WA695](https://openairdocs.org/ntsb/CEN11WA695.md): Cessna 210K · (Atlantic Ocean) · Accident · 6 fatal · Class 5 · Foreign · Aug 19, 2011 · N8214M · Destroyed
- [NTSB ERA11LA501](https://openairdocs.org/ntsb/ERA11LA501.md): Piper PA-22-108 · Monmouth, ME · Accident · No injuries · Limited investigation · Final report · Aug 18, 2011 · N5048Z · Substantial damage
  > Operation of the airplane by a non-certificated pilot and his failure to maintain airplane control.
- [NTSB ANC11LA080](https://openairdocs.org/ntsb/ANC11LA080.md): Piper PA-18-150 · Cape Yakataga, AK · Accident · 2 fatal · Limited investigation · Final report · Aug 16, 2011 · N4205Z · Substantial damage
  > A collision into water during initial climb after takeoff for undetermined reasons.
- [NTSB WPR11WA351](https://openairdocs.org/ntsb/WPR11WA351.md): Robinson R22 · Fitzroy Crossing, Australia, Australia · Accident · 1 fatal · Foreign investigation · Jul 27, 2011 · VH-YOL · Substantial damage
  > On July 27, 2011, at 0930 universal coordinated time, a Robinson R-22 Beta, VH-YOL, registered to and operated by a private owner, collided with terrain near Fitzoy Crossing, Australia. The helicopter was substantially damaged and the pilot, the sole…
- [NTSB CEN11LA504](https://openairdocs.org/ntsb/CEN11LA504.md): Quasar Acft 214SL · Fort Worth, TX · Accident · No injuries · Limited investigation · Final report · Jul 22, 2011 · N89QL · Substantial damage
  > A fuel leak in the engine compartment, which resulted in an engine fire.
- [NTSB WPR11LA307](https://openairdocs.org/ntsb/WPR11LA307.md): Stinson 108-2 · Columbia, CA · Accident · Minor injuries · Limited investigation · Final report · Jul 5, 2011 · N9351K · Substantial damage
  > The airplane’s failure to climb at a sufficient rate to clear trees and terrain beyond the end of the runway for reasons that could not be determined because postaccident examination did not reveal any mechanical malfunctions or failures that would have…
- [NTSB CEN11CA445](https://openairdocs.org/ntsb/CEN11CA445.md): Skytrails Lsa Predator · Coldspring, TX · Accident · Minor injuries · Data collection · Final report · Jul 4, 2011 · N5358Z · Substantial damage
  > The pilot's inadequate consideration of obstructions on his flight path and inability to maintain altitude following an unexplained loss of lift.
- [NTSB CEN11LA449](https://openairdocs.org/ntsb/CEN11LA449.md): Abbey Victor RV9-A · Leander, TX · Accident · Minor injuries · Limited investigation · Final report · Jun 30, 2011 · N59VA · Substantial damage
  > The partial loss of engine power for reasons that could not be determined because examination of the engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB WPR11LA272](https://openairdocs.org/ntsb/WPR11LA272.md): Air Tractor AT-301 · Hogeland, MT · Accident · 1 fatal · Limited investigation · Final report · Jun 21, 2011 · N3661B · Substantial damage
  > Collision with the ground while maneuvering at low altitude for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation.
- [NTSB CEN11LA385](https://openairdocs.org/ntsb/CEN11LA385.md): Wiley C W RV-6A · Colgate, OK · Accident · No injuries · Limited investigation · Final report · Jun 13, 2011 · N80WW · Substantial damage
  > The loss of engine power for undetermined reasons.
- [NTSB WPR11FA256](https://openairdocs.org/ntsb/WPR11FA256.md): Bellanca 17-31ATC · Ukiah, OR · Accident · 3 fatal · Field investigation · Final report · Jun 11, 2011 · N79BF · Substantial damage
  > The non-instrument-rated pilot's decision to conduct a visual flight rules flight over mountainous terrain into a region covered by clouds, which likely resulted in spatial disorientation and subsequent loss of airplane control.
- [NTSB CEN11WA382](https://openairdocs.org/ntsb/CEN11WA382.md): Air Tractor AT-502B · La Fora, Tiquisate, Guatemala · Accident · 1 fatal · Foreign investigation · Jun 11, 2011 · N502BB · Substantial damage
- [NTSB ERA11WA310](https://openairdocs.org/ntsb/ERA11WA310.md): Piper PA-34-200 · Sao Pedro, Brazil · Accident · 4 fatal · Foreign investigation · May 16, 2011 · PT-IFS · Destroyed
  > On May 16, 2011, about 0130 universal coordinated time, a Piper PA-34-200, Brazilian registration PT-IFS, was destroyed when it impacted hilly terrain under unknown circumstances near Sao Pedro, Sao Paulo, Brazil. The Brazilian certificated pilot and three…
- [NTSB ERA11WA305](https://openairdocs.org/ntsb/ERA11WA305.md): Cessna 210M · Breu Branco, Brazil · Accident · 3 fatal · Foreign investigation · May 14, 2011 · PR-HSM · Substantial damage
  > On May 14, 2011, about 1430 universal coordinated time, a Cessna 210M, Brazilian registration PR-HSM, was substantially damaged when it impacted wooded terrain under unknown circumstances, in a remote, dense forest near Breu Branco, Brazil. The foreign…
- [NTSB ERA11FA299](https://openairdocs.org/ntsb/ERA11FA299.md): Piper PA-22-150 · Benezette, PA · Accident · 1 fatal · Field investigation · Final report · May 13, 2011 · N7603D · Substantial damage
  > The pilot's loss of airplane control for reasons that could not be determined from the available evidence.
- [NTSB ERA11FA293](https://openairdocs.org/ntsb/ERA11FA293.md): Beech F33A · Tarentum, PA · Accident · Serious injuries · Field investigation · Final report · May 11, 2011 · N17825 · Substantial damage
  > The pilot's delay in aborting the takeoff, which resulted in a runway overrun. Contributing to the accident was the pilot's inadequate preflight planning and excessive loading of the airplane.
- [NTSB ANC11WA028](https://openairdocs.org/ntsb/ANC11WA028.md): Cessna 195A · Campbell River, Canada · Accident · 1 fatal · Foreign investigation · Apr 28, 2011 · N41X · Destroyed
- [NTSB CEN11LA308](https://openairdocs.org/ntsb/CEN11LA308.md): Piper PA-28-180 · Streetman, TX · Accident · Minor injuries · Limited investigation · Final report · Apr 25, 2011 · N6492J · Substantial damage
  > The airplane’s inability to establish a climb for undetermined reasons, which resulted in a collision with trees.

Next page: https://openairdocs.org/ntsb-events/000/sequence.md?page=33

## 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 s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '000' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/000/sequence?page=32

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