NTSB investigations: Pratt & Whitney PT6A series
24 cases on aircraft whose registry engine model is Pratt & Whitney PT6A series, where the defining event was Loss of engine power (total). Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 2008 | 4 |
|---|---|
| 2009 | 2 |
| 2010 | 2 |
| 2011 | 1 |
| 2012 | 1 |
| 2013 | 4 |
| 2014 | 1 |
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 1 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "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 ('52032', '52034')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e.\"isDefiningEvent\" AND e.\"tier2Number\" = '341'))
ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
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 ('52032', '52034')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '341'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB WPR25FA213Accident · 1 fatalClass 3 · FieldPreliminary reportScott Macwilliam SR3500 Moose · Quinault, WAOn July 15, 2025, at about 1440 Pacific daylight time, an experimental amateur-built Murphy Moose SR3500 airplane, N80TM, sustained substantial damage when it was involved in an accident near Quinault, Washington. The pilot received minor injuries, one…NTSB WPR24LA070Accident · No injuriesClass 3 · LimitedFinal reportAir Tractor AT-502A · Stratford, CAA partial loss of engine power due to the malfunction of the engine compressor bleed-off valve.NTSB ERA23LA327Accident · No injuriesClass 3 · LimitedFinal reportAir Tractor AT502 · Leipsic, OHThe incorrect assembly of the turbine engine’s reduction gear box second-stage ring gear, which resulted in an internal failure of multiple engine components and a total loss of power.NTSB WPR21LA313Accident · Serious injuriesClass 3 · LimitedFinal reportCessna 425 · Helena, MTA flameout of both engines due to fuel starvation for reasons that could not be determined due to the airplane’s damage.NTSB CEN20LA279Accident · No injuriesClass 3 · LimitedFinal reportAir Tractor AT502 · Dalhart, TXThe total loss of engine power due to a failed fuel control unit bearing.NTSB WPR18LA234Accident · Serious injuriesClass 3 · LimitedFinal reportAir Tractor AT 400 · Grand Forks, NDThe loss of engine power while maneuvering due to the failure of the power turbine blade assembly for reasons that could not be determined based on available evidence.NTSB CEN17LA165Accident · No injuriesLimited investigationFinal reportAir Tractor AT 602 · Vidrine, LAThe total loss of engine power for reasons that could not be determined because an examination of the engine and a test run did not reveal any mechanical malfunctions or failures that would have precluded normal operation.NTSB WPR16LA107Accident · Minor injuriesLimited investigationFinal reportCessna 208B · Acampo, CAA total loss of engine power due to a fatigue fracture of the fuel pressure line that connected the fuel control unit and the fuel flow transducer due to vibration as the result of a fatigue fracture of an associated support clamp. Contributing to the…NTSB ERA15WA310Accident · Minor injuriesForeign investigationCessna 208B · Saba, NTOn August 12, 2015, at 1630 Universal Coordinated Time (UTC), a Cessna 208B, U.S. Registration N924FE, operated by Mountain Air Cargo, was substantially damaged following a loss of engine power and ditching in the Caribbean Sea near Saba, Netherlands…NTSB WPR14LA267Accident · Minor injuriesLimited investigationFinal reportAir Tractor AT 502B · Sacramento, CAThe total loss of engine power for reasons that could not be determined because the airplane was not available for postaccident examination.NTSB WPR14FA068Accident · 1 fatalField investigationFinal reportCessna 208B · Kalaupapa, HIThe loss of engine power due to the fracture of multiple blades on the compressor turbine wheel, which resulted in a ditching. The reason for the blade failures could not be determined due to secondary thermal damage to the blades.NTSB WPR14FA024Accident · No injuriesField investigationFinal reportCessna 208 · Wailea, HIImproper maintenance that resulted in contamination of the engine's compressor turbine disc and blade assembly by glass bead remnants, which resulted in a blade failure.NTSB CEN13LA568Accident · No injuriesLimited investigationFinal reportAir Tractor AT 802 · Gould, ARThe failure of a bearing in the fuel control unit, which resulted in fuel starvation and a total loss of engine power.NTSB CEN13LA473Accident · No injuriesLimited investigationFinal reportAir Tractor AT-502B · Nauvoo, ILA fatigue failure of an engine compressor turbine blade, which resulted in extensive secondary engine damage and a complete loss of engine power.NTSB CEN13FA080Accident · Minor injuriesField investigationFinal reportCessna 208B · Bryans Corner, OKThe total loss of engine power as a result of a fractured compressor turbine blade due to fatigue cracking.NTSB WPR12CA069Accident · Minor injuriesData collectionFinal reportCessna 208 · Mesquite, NVThe pilot's improper preflight planning, which resulted in a loss of engine power due to fuel exhaustion.NTSB CEN10LA437Accident · Minor injuriesLimited investigationFinal reportAir Tractor AT-602 · Yates City, ILThe loss of engine power for undetermined reasons.NTSB CEN10LA298Accident · No injuriesLimited investigationFinal reportAir Tractor AT-502B · Pollard, ARA loss of engine power for undetermined reasons.NTSB ERA10IA094Incident · No injuriesIncident investigationFinal reportCessna 208B · Rome, NYThe operator's inadequate engine wash intervals, which resulted in compressor turbine blade sulphidation and subsequent turbine blade failure.NTSB CEN09CA295Accident · Minor injuriesData collectionFinal reportAir Tractor AT502 · Lisse, TXA total loss of engine power for undetermined reasons.NTSB WPR09CA064Accident · No injuriesData collectionFinal reportAir Tractor AT-502 · Dinuba, CAThe failure of maintenance personnel to properly install the engine's Py line correctly, which resulted in the total loss of engine power and subsequent force landing. Contributing to the accident was the lack of suitable terrain.NTSB CHI08CA257Accident · No injuriesData collectionFinal reportAir Tractor AT-400A · Luverne, MNThe failure of the compressor turbine blades which resulted in the loss of power. Factors associated with the accident were the low altitude and the trees.NTSB CHI08CA217Accident · No injuriesData collectionFinal reportGrumman G-164A · Veedersburg, INThe oil filler cap not reinstalled by the pilot prior to the aerial application flight and the total loss of engine oil during an aerial application. Additional causes were the low altitude of the operation and the unsuitable terrain encountered by the pilot…NTSB DEN08LA125Accident · Minor injuriesLimited investigationFinal reportAir Tractor AT-402B · Deerfield, KSThe pilot inadvertently stalling the airplane. Contributing factors in this accident were the pilot intentionally performing low altitude maneuvers (side slips), unporting and starving the engine of fuel, and his initiating a climb at low airspeed.