NTSB investigations: Pratt & Whitney PT6A series
14 cases on aircraft whose registry engine model is Pratt & Whitney PT6A series, where the defining event was Loss of engine power (partial). 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 | 1 |
|---|---|
| 2010 | 1 |
| 2011 | 1 |
| 2014 | 2 |
| 2015 | 3 |
| 2017 | 1 |
| 2018 | 1 |
| 2021 | 1 |
| 2023 | 1 |
| 2025 | 2 |
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\" = '342'))
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" = '342'))
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 CEN25LA313Accident · Minor injuriesClass 3 · LimitedPreliminary reportAir Tractor AT-502 · Lawrenceville, ILOn August 10, 2025, about 1321 central daylight time, an Air Tractor AT-502, was substantially damaged when it was involved in an accident near Lawrenceville, Illinois. The pilot sustained minor injuries. The airplane was operated as a Title 14 Code of…NTSB ERA25LA222Accident · Serious injuriesClass 3 · LimitedPreliminary reportDehavilland DHC-6 Twin Otter · Tullahoma, TNOn June 8, 2025, about 1220 central daylight time, a DeHavilland DHC-6 Twin Otter, N166DH, was involved in an accident near Tullahoma, Tennessee. The commercial pilot and five passengers were seriously injured, and 15 passengers were not injured. The flight…NTSB CEN23LA317Accident · No injuriesClass 3 · LimitedFinal reportGrumman G-164A · Patoka, ILA partial loss of engine power due to the failure of two compressor turbine blades as a result of the engine operating near or above the engine’s operating limits for an undetermined amount of time beyond the recommended engine’s TBO limit, which led to…NTSB ERA21LA287Accident · No injuriesClass 3 · LimitedFinal reportPiper PA46-500TP · Manteo, NCThe improperly secured pneumatic compressor discharge air (P3) line coupling nut on the engine, which ultimately allowed the nut to back off resulting in a partial loss of engine power.NTSB CEN18LA249Accident · No injuriesLimited investigationFinal reportAir Tractor AT502 · Tappen, NDThe partial loss of engine power for reasons that could not be determined based on the available evidence.NTSB ERA18LA031Accident · Minor injuriesLimited investigationFinal reportPiper PA46 · Clearwater, FLA partial loss of engine power for reasons that could not be determined based on the available information.NTSB CEN15LA389Accident · Minor injuriesLimited investigationFinal reportAir Tractor AT 502B · Monroe, NELoss of propeller thrust for reasons that could not be determined, since examination of the airplane's engine, propeller, and associated accessories revealed no anomalies.NTSB ERA15LA293Accident · Serious injuriesLimited investigationFinal reportBeech C90B · Georgetown, KYUndetermined based on the available evidence.NTSB CEN15LA180Accident · Minor injuriesLimited investigationFinal reportCessna 208B · Verdigris, OKThe fuel pump gear manufacturer’s allowance of set-up gears made from a nonconforming material to be put in the production inventory system, the installation of a nonconforming gear in the accident airplane’s production fuel pump, and the gear’s failure,…NTSB CEN15FA034Accident · 4 fatalField investigationFinal reportRaytheon B200 · Wichita, KSThe pilot's failure to maintain lateral control of the airplane after a reduction in left engine power and his application of inappropriate rudder input. Contributing to the accident was the pilot's failure to follow the emergency procedures for an engine…NTSB WPR14LA245Accident · No injuriesLimited investigationFinal reportAir Tractor AT 502B · Princeton, CAThe partial loss of engine power during takeoff for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation.NTSB WPR11LA278Accident · No injuriesLimited investigationFinal reportAir Tractor AT-502 · Blackfoot, IDA partial loss of engine power during takeoff for undetermined reasons.NTSB CEN11IA106Incident · No injuriesIncident investigationFinal reportPiper PA-46-500TP · Olathe, KSThe loss of engine power for undetermined reasons.NTSB DFW08LA167Accident · No injuriesLimited investigationFinal reportAir Tractor AT-502B · Bethany, MOThe pilot's decision to take off with a known deficiency.