# NTSB investigations: Pratt & Whitney PT6 series 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 WPR23LA338](https://openairdocs.org/ntsb/WPR23LA338.md): Bell 212 · Balch Camp, CA · Accident · Serious injuries · Class 3 · Limited · Final report · Sep 10, 2023 · N873HL · Destroyed > The pilot’s inadequate performance planning for the operation that resulted in an excessive gross weight for the operating conditions, leading to a loss of altitude during maneuvering and contact with trees. Contributing to the accident was the pilot’s… - [NTSB WPR21LA268](https://openairdocs.org/ntsb/WPR21LA268.md): Bell 212HP · Weed, CA · Accident · No injuries · Class 3 · Limited · Final report · Jul 7, 2021 · N911KW · Substantial damage > The pilot’s failure to maintain altitude during an approach to a lake. Contributing to the accident was the pilot’s failure to release the full water bucket as the helicopter was settling, which reduced the helicopter’s out-of-ground-effect performance. - [NTSB DCA20MA059](https://openairdocs.org/ntsb/DCA20MA059.md): Sikorsky S76 · Calabasas, CA · Accident · 9 fatal · Class 1 · Major · Final report · Jan 26, 2020 · N72EX · Destroyed > The pilot’s decision to continue flight under visual flight rules into instrument meteorological conditions, which resulted in the pilot’s spatial disorientation and loss of control. Contributing to the accident was the pilot’s likely self-induced pressure… - [NTSB CEN14CA082](https://openairdocs.org/ntsb/CEN14CA082.md): Sikorsky S 76B · Port Fourchon, LA · Accident · No injuries · Data collection · Final report · Dec 5, 2013 · N707MY · Substantial damage > The pilot's loss of control of the helicopter when it entered a settling with power condition during sudden gusty wind conditions on takeoff resulting in the helicopter subsequently impacting terrain. - [NTSB WPR13IA020](https://openairdocs.org/ntsb/WPR13IA020.md): Agusta A119 · Dolan Springs, AZ · Incident · No injuries · Incident investigation · Final report · Oct 20, 2012 · N207CF · Minor damage > Insufficient clearance between a truck and the main rotor blades of a helicopter on the ground with the engine running because of the lack of on-scene coordination between the agencies that responded to and were tasked with managing the vehicle accident site. - [NTSB CEN12FA250](https://openairdocs.org/ntsb/CEN12FA250.md): Sikorsky S-76B · Gulf of Mexico, LA · Accident · No injuries · Field investigation · Final report · Apr 17, 2012 · N56RD · Substantial damage > The intermittent loss of engine power due to a "stuck" stepper motor in the No. 2 engine's fuel control as a result of an inadequate overhaul. Contributing to the accident was the pilot's decision to continue flying the helicopter with a known defect, his… - [NTSB WPR11LA277](https://openairdocs.org/ntsb/WPR11LA277.md): Bell 212 · Mesa, AZ · Accident · Serious injuries · Limited investigation · Final report · Jun 21, 2011 · N49678 · Destroyed > The pilot's failure to maintain helicopter control while in a low hover. - [NTSB WPR11FA163](https://openairdocs.org/ntsb/WPR11FA163.md): Sikorsky S-58ET · El Segundo, CA · Accident · Serious injuries · Field investigation · Final report · Mar 13, 2011 · N33602 · Substantial damage > A partial loss of engine power and the failure of the external hook to release the load for undetermined reasons. - [NTSB WPR10FA029](https://openairdocs.org/ntsb/WPR10FA029.md): Agusta A119 · Blythe, CA · Accident · No injuries · Field investigation · Final report · Oct 23, 2009 · N119AH · Substantial damage > The loss of engine power during cruise flight for undetermined reasons. - [NTSB WPR09TA356](https://openairdocs.org/ntsb/WPR09TA356.md): Bell 212 · Willow Creek, CA · Accident · 1 fatal · Final report · Jul 21, 2009 · N212HP · No damage > The rappeller's failure to properly latch the rappelling harness to the rappelling assembly before exiting the helicopter. - [NTSB LAX08LA200](https://openairdocs.org/ntsb/LAX08LA200.md): Sikorsky S-76A · Santa Maria, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 27, 2008 · N343AA · Substantial damage > The copilot's misjudged clearance from an object during a hovering turn for landing. Contributing to the accident were the inadequately marked heliport surface and the close proximity of an obstruction near the landing area. - [NTSB LAX07FA056](https://openairdocs.org/ntsb/LAX07FA056.md): Bell 412SP · Hesperia, CA · Accident · 3 fatal · Field investigation · Final report · Dec 11, 2006 · N410MA · Destroyed > The pilot's inadvertent encounter with instrument meteorological conditions and subsequent failure to maintain terrain clearance. Contributing to the accident were the dark night conditions, fog, and mountainous terrain. - [NTSB LAX06TA284](https://openairdocs.org/ntsb/LAX06TA284.md): Bell 212 · Happy Camp, CA · Accident · No injuries · Final report · Sep 4, 2006 · N873HL · Substantial damage > Failure of compressor second stage stator vane for undetermined reasons while maneuvering. - [NTSB DEN05FA103](https://openairdocs.org/ntsb/DEN05FA103.md): Agusta A119 · Mancos, CO · Accident · 3 fatal · Field investigation · Final report · Jun 30, 2005 · N403CF · Substantial damage > a loss of engine power for undetermined reasons and the pilot's inability to get into autorotation prior to impacting the ground. A factor contributing to the accident was the helicopter's low altitude when power was lost. - [NTSB ANC03GA023](https://openairdocs.org/ntsb/ANC03GA023.md): Bell 212 · McMurdo Station, AY · Accident · Serious injuries · Final report · Jan 17, 2003 · N1079U · Substantial damage > The pilot's continued operation of the helicopter with an unstable external load, which resulted in damage to the cargo hook assembly, adjacent throttle controls, and subsequent loss of engine power, precipitating an emergency descent and impact with terrain.… - [NTSB DEN01TA134](https://openairdocs.org/ntsb/DEN01TA134.md): Bell 205A-1 · Jackson, WY · Accident · No injuries · Final report · Jul 31, 2001 · N205BR · 2 aircraft · Substantial damage > the Bell 212 helicopter pilot's inadequate visual lookout which resulted in a midair collision. - [NTSB DEN00TA160](https://openairdocs.org/ntsb/DEN00TA160.md): Bell 212 · Jackson, WY · Accident · Minor injuries · Final report · Aug 31, 2000 · N8224V · Substantial damage > Loss of control for undetermined reasons. - [NTSB MIA00FA030](https://openairdocs.org/ntsb/MIA00FA030.md): Bell 212 · Philadelphia, MS · Accident · 2 fatal · Field investigation · Final report · Nov 27, 1999 · N8144M · Destroyed > The failure of the pilot and company maintenance personnel during preflight and periodic inspections to identify the signs of fretting and looseness in the "red" main rotor blade pitch change horn to main rotor blade grip attachment, resulting in the… - [NTSB FTW81DPG59](https://openairdocs.org/ntsb/FTW81DPG59.md): Aero Comdr S2R · Swifton, AR · Accident · No injuries · Closed · Aug 5, 1981 · N8817Q · Substantial damage - [NTSB FTW78DRA33](https://openairdocs.org/ntsb/FTW78DRA33.md): Aero-Comdr S-2R · Beasley, TX · Accident · No injuries · Closed · Jul 18, 1978 · N8817Q · 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('52033')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=52033 --- 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.