# NTSB investigations: Pratt & Whitney R1340 series, AK 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. ## Latest cases - [NTSB ANC26LA067](https://openairdocs.org/ntsb/ANC26LA067.md): Dehavilland DHC-3 · Denali National Park, AK · Accident · No injuries · Class 4 · Limited · Investigation open · Jul 3, 2026 · N424KT · Substantial damage - [NTSB CEN19MA141](https://openairdocs.org/ntsb/CEN19MA141.md): De Havilland DHC-2 · Ketchikan, AK · Accident · 6 fatal · Class 1 · Major · Final report · May 13, 2019 · N952DB · 2 aircraft · Destroyed > The inherent limitations of the see-and-avoid concept, which prevented the two pilots from seeing the other airplane before the collision, and the absence of visual and aural alerts from both airplanes’ traffic display systems, while operating in a geographic… - [NTSB ANC16LA034](https://openairdocs.org/ntsb/ANC16LA034.md): De Havilland DHC3 · Homer, AK · Accident · No injuries · Limited investigation · Final report · Jun 19, 2016 · N104BM · Substantial damage > An in-flight collision with a bald eagle, which resulted in substantial damage to the left wing. - [NTSB ANC15FA071](https://openairdocs.org/ntsb/ANC15FA071.md): Dehavilland DHC 3T · Iliamna, AK · Accident · 3 fatal · Field investigation · Final report · Sep 15, 2015 · N928RK · Substantial damage > The pilot's decision to depart in dark night, visual meteorological conditions over water, which resulted in his subsequent spatial disorientation and loss of airplane control. Contributing to the accident was the pilot's failure to determine the airplane's… - [NTSB ANC15MA041](https://openairdocs.org/ntsb/ANC15MA041.md): Dehavilland DHC-3 · Ketchikan, AK · Accident · 9 fatal · Class 1 · Major · Final report · Jun 25, 2015 · N270PA · Substantial damage > (1) the pilot's decision to continue visual flight into an area of instrument meteorological conditions, which resulted in his geographic disorientation and controlled flight into terrain; and (2) Promech's company culture, which tacitly endorsed flying in… - [NTSB ANC15LA037](https://openairdocs.org/ntsb/ANC15LA037.md): Dehavilland DHC-3T · Skwentna, AK · Accident · No injuries · Limited investigation · Final report · Jun 4, 2015 · N3125N · Substantial damage > The flutter failure of the right elevator servo tab due to the improper fabrication of the servo tab and maintenance personnel’s subsequent failure to detect anomalies with the servo tab. - [NTSB ANC14LA035](https://openairdocs.org/ntsb/ANC14LA035.md): Dehavilland DHC-3T · Homer, AK · Accident · No injuries · Limited investigation · Final report · May 30, 2014 · N3125N · Substantial damage > The flutter failure of the right elevator servo tab due to the improper fabrication of the servo tab and maintenance personnel’s subsequent failure to detect anomalies with the servo tab. - [NTSB ANC11FA107](https://openairdocs.org/ntsb/ANC11FA107.md): Dehavilland DHC-3T · Kodiak, AK · Accident · 1 fatal · Field investigation · Final report · Sep 24, 2011 · N361TT · Substantial damage > The pilot’s failure to maintain clearance from a tree during a low altitude maneuver and his failure to maintain control of the airplane. Contributing to the accident was the pilot’s use of over-the-counter sedating medications. - [NTSB ANC10MA068](https://openairdocs.org/ntsb/ANC10MA068.md): Dehavilland DHC-3 · Aleknagik, AK · Accident · 5 fatal · Class 1 · Major · Final report · Aug 9, 2010 · N455A · Substantial damage > The pilot's temporary unresponsiveness for reasons that could not be established from the available information. Contributing to the investigation's inability to determine exactly what occurred in the final minutes of the flight was the lack of a cockpit… - [NTSB ANC09LA065](https://openairdocs.org/ntsb/ANC09LA065.md): Noorduyn UC-64A · Akiachak, AK · Accident · No injuries · Limited investigation · Final report · Jul 11, 2009 · N225BL · Substantial damage > The loss of engine power due to the failure of a crankshaft component, resulting in an off-airport landing. - [NTSB ANC06LA134](https://openairdocs.org/ntsb/ANC06LA134.md): de Havilland DHC-3 · Wainwright, AK · Accident · No injuries · Limited investigation · Final report · Sep 2, 2006 · N3125N · Substantial damage > The pilot's failure to adequately compensate for wind conditions during the landing roll, which resulted in a loss of control, and subsequent collision with a ditch when the airplane departed the runway. A factor contributing to the accident was a crosswind. - [NTSB ANC06LA103](https://openairdocs.org/ntsb/ANC06LA103.md): de Havilland DHC-3 · Juneau, AK · Accident · Serious injuries · Limited investigation · Final report · Jul 31, 2006 · N93356 · Substantial damage > The pilot's failure to maintain altitude/clearance during approach, which resulted in the airplane impacting the surface of the water. Factors associated with the accident were the flat-light and glassy water conditions, which affected the pilot's ability to… - [NTSB ANC03LA021](https://openairdocs.org/ntsb/ANC03LA021.md): de Havilland DHC-3 · Nikolai, AK · Accident · No injuries · Limited investigation · Final report · Dec 28, 2002 · N3904 · Substantial damage > An improper and undocumented major repair of the elevator torque tube support assembly by an unknown person, which resulted in an in-flight disconnection of the airplane's right elevator, and a jammed rudder. A factor associated with the accident is the… - [NTSB ANC02LA115](https://openairdocs.org/ntsb/ANC02LA115.md): de Havilland DHC-3 · Tenakee Springs, AK · Accident · No injuries · Limited investigation · Final report · Sep 4, 2002 · N335AK · Substantial damage > The pilot's misjudgment of the airplane's speed/distance from a dock resulting in the airplane drifting into a wooden piling during a taxi from landing. A factor in the accident was the presence of a tidal current. - [NTSB ANC01LA138](https://openairdocs.org/ntsb/ANC01LA138.md): de Havilland DHC-3 · Cordova, AK · Accident · Minor injuries · Limited investigation · Final report · Sep 7, 2001 · N254AW · Substantial damage > The loss of engine power during cruise due to the fracture of an engine cylinder exhaust valve. - [NTSB ANC01LA062](https://openairdocs.org/ntsb/ANC01LA062.md): Noorduyn UC-64A · Seward, AK · Accident · No injuries · Limited investigation · Final report · Jun 4, 2001 · N225BL · Substantial damage > The pilot's inadvertent stall of the airplane during takeoff. Factors associated with the accident were the pilot's inadequate weather evaluation, his inadequate compensation for wind conditions, and turbulence. - [NTSB ANC99LA057](https://openairdocs.org/ntsb/ANC99LA057.md): de Havilland DHC-3 · Healy, AK · Accident · No injuries · Limited investigation · Final report · Apr 27, 1999 · N3125N · Substantial damage > The pilot's selection of an unsafe/hazardous area for landing. Factors in the accident were the presence of a tail wind, the pilot's inadequate evaluation of the wind conditions, and a narrow airstrip. - [NTSB ANC91LA061](https://openairdocs.org/ntsb/ANC91LA061.md): Rockwell S-2R · Larsen Bay, AK · Accident · 1 fatal · Limited investigation · Final report · May 25, 1991 · N4851X · Destroyed > The pilot's decision to continue VFR into IMC conditions and failure to maintain proper altitude. Contributing to the accident was the low ceiling and fog. - [NTSB ANC91LA022](https://openairdocs.org/ntsb/ANC91LA022.md): De Havilland DHC-3 · Nome, AK · Accident · Serious injuries · Limited investigation · Final report · Jan 28, 1991 · N212NY · Substantial damage > The failure of the 1, 2, 6, 7, 8 and 9 piston linkrods which were broken at the master rod attach end. Contributing to the accident was the rough, uneven terrain. - [NTSB ANC90LA184](https://openairdocs.org/ntsb/ANC90LA184.md): De Havilland DHC-3 · King Salmon, AK · Accident · No injuries · Limited investigation · Final report · Sep 23, 1990 · N5322G · Substantial damage > The pilot-in-command's failure to maintain airplane control during the takeoff roll, and failure of not attaining airspeed on takeoff. - [NTSB ANC90LA103](https://openairdocs.org/ntsb/ANC90LA103.md): De Havilland DHC-3 · Beaver Village, AK · Accident · Minor injuries · Limited investigation · Final report · Jun 30, 1990 · N17689 · Substantial damage > Mechanical failure of an exhaust rocker arm. - [NTSB ANC89LA156](https://openairdocs.org/ntsb/ANC89LA156.md): de Havilland DHC-3 · Sheenjek River, AK · Accident · No injuries · Limited investigation · Final report · Sep 2, 1989 · N17689 · Substantial damage > Failure of the pilot to go around when he was unable to attain the proper touchdown point and his excessive application of brakes during the landing. Contributing factors were: the downdraft, excessive remedial action, and soft terrain. - [NTSB SEA88LA132](https://openairdocs.org/ntsb/SEA88LA132.md): De Havilland DHC-3 · Wrangell, AK · Accident · No injuries · Limited investigation · Final report · Jul 15, 1988 · N55CX · Substantial damage > Plt attempted flight through a mountain pass in the presence of low clouds and fog. Visual ground reference was lost and the acft collided with a snow bank. Plt cited personal and company-induced pressures as factors. Operator completed accident report. - [NTSB ANC88LA066](https://openairdocs.org/ntsb/ANC88LA066.md): De Havilland DHC-3 · Eagle, AK · Accident · No injuries · Limited investigation · Final report · Jun 2, 1988 · N3125N · Substantial damage > The pilot was attempting to land a heavily loaded De Havilland otter (DHC-3) on a gravel strip in rural Alaska. Upon touchdown, the pilot reported that the airplane veered slightly to the right. He unlocked the tail wheel centering device and attempted to… - [NTSB ANC85LA014](https://openairdocs.org/ntsb/ANC85LA014.md): de Havilland Otter DHC-3 · Dan Creek, AK · Accident · No injuries · Limited investigation · Final report · Oct 28, 1984 · N2899J · Substantial damage > According to the plt the acft hit a downdraft, landed hard and struck the wing on the rwy surface. The wind was reported from 360 deg 15 KTS gusting to 20 KTS. - [NTSB ANC83IA007](https://openairdocs.org/ntsb/ANC83IA007.md): de Havilland DHC-3 · Homer, AK · Incident · No injuries · Incident investigation · Final report · Oct 27, 1982 · N3904 · Minor damage > After removing the floats and reinstalling the wheels on the aircraft, the pilot received permission to take off on a roadway bridge thats spans beluga lake. The purpose of the flight was to ferry the plane to nearby Homer airport. On takeoff, the aircraft… - [NTSB ANC81DA076](https://openairdocs.org/ntsb/ANC81DA076.md): Dehavilland DHC-3 · South Naknek, AK · Accident · No injuries · Closed · Jul 4, 1981 · N98T · Substantial damage - [NTSB ANC75AA011](https://openairdocs.org/ntsb/ANC75AA011.md): Dehavilland DHC-3 · Bethel, AK · Accident · No injuries · Closed · Aug 6, 1974 · N98T · Substantial damage - [NTSB ANC75AA004](https://openairdocs.org/ntsb/ANC75AA004.md): Aero Comdr 600S2R · Umiat, AK · Accident · No injuries · Closed · Jul 9, 1974 · N5521X · Substantial damage - [NTSB ANC74AA043](https://openairdocs.org/ntsb/ANC74AA043.md): Dehavilland DHC-3 · Eek, AK · Accident · No injuries · Closed · Nov 2, 1973 · N98T · Substantial damage - [NTSB ANC69A0042](https://openairdocs.org/ntsb/ANC69A0042.md): Dehavilland DHC-3 · Port Moller, AK · Accident · No injuries · Closed · Mar 10, 1969 · N98T · Substantial damage - [NTSB ANC67A0053](https://openairdocs.org/ntsb/ANC67A0053.md): Dehaviland DHC-3 · Anchorage, AK · Accident · No injuries · Closed · Jan 17, 1967 · N98T · Substantial damage - [NTSB ANC66A0052](https://openairdocs.org/ntsb/ANC66A0052.md): Sikorsky S55 · Kenai, AK · Accident · No injuries · Closed · Jun 29, 1966 · N874 · Substantial damage - [NTSB ANC66F0005](https://openairdocs.org/ntsb/ANC66F0005.md): American 100B · Dry Bay, AK · Accident · No injuries · Closed · Jun 24, 1965 · N709Y · Substantial damage ## 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."eventStateOrRegion" = 'AK' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('52016')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=52016&state=AK --- 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.