# NTSB investigations: Pratt & Whitney PT6A series: Loss of engine power (total)

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 WPR25FA213](https://openairdocs.org/ntsb/WPR25FA213.md): Scott Macwilliam SR3500 Moose · Quinault, WA · Accident · 1 fatal · Class 3 · Field · Preliminary report · Jul 15, 2025 · N80TM · Substantial damage
  > On 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 WPR24LA070](https://openairdocs.org/ntsb/WPR24LA070.md): Air Tractor AT-502A · Stratford, CA · Accident · No injuries · Class 3 · Limited · Final report · Jan 10, 2024 · N6126U · Substantial damage
  > A partial loss of engine power due to the malfunction of the engine compressor bleed-off valve.
- [NTSB ERA23LA327](https://openairdocs.org/ntsb/ERA23LA327.md): Air Tractor AT502 · Leipsic, OH · Accident · No injuries · Class 3 · Limited · Final report · Aug 4, 2023 · N5048S · Substantial damage
  > The 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 WPR21LA313](https://openairdocs.org/ntsb/WPR21LA313.md): Cessna 425 · Helena, MT · Accident · Serious injuries · Class 3 · Limited · Final report · Aug 11, 2021 · N783MB · Substantial damage
  > A flameout of both engines due to fuel starvation for reasons that could not be determined due to the airplane’s damage.
- [NTSB CEN20LA279](https://openairdocs.org/ntsb/CEN20LA279.md): Air Tractor AT502 · Dalhart, TX · Accident · No injuries · Class 3 · Limited · Final report · Jul 10, 2020 · N61315 · Substantial damage
  > The total loss of engine power due to a failed fuel control unit bearing.
- [NTSB WPR18LA234](https://openairdocs.org/ntsb/WPR18LA234.md): Air Tractor AT 400 · Grand Forks, ND · Accident · Serious injuries · Class 3 · Limited · Final report · Aug 21, 2018 · N7300M · Substantial damage
  > The 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 CEN17LA165](https://openairdocs.org/ntsb/CEN17LA165.md): Air Tractor AT 602 · Vidrine, LA · Accident · No injuries · Limited investigation · Final report · Apr 21, 2017 · N653LA · Substantial damage
  > The 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 WPR16LA107](https://openairdocs.org/ntsb/WPR16LA107.md): Cessna 208B · Acampo, CA · Accident · Minor injuries · Limited investigation · Final report · May 12, 2016 · N1114A · Substantial damage
  > A 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 ERA15WA310](https://openairdocs.org/ntsb/ERA15WA310.md): Cessna 208B · Saba, NT · Accident · Minor injuries · Foreign investigation · Aug 12, 2015 · N924FE · Substantial damage
  > On 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 WPR14LA267](https://openairdocs.org/ntsb/WPR14LA267.md): Air Tractor AT 502B · Sacramento, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 23, 2014 · N61150 · Substantial damage
  > The total loss of engine power for reasons that could not be determined because the airplane was not available for postaccident examination.
- [NTSB WPR14FA068](https://openairdocs.org/ntsb/WPR14FA068.md): Cessna 208B · Kalaupapa, HI · Accident · 1 fatal · Field investigation · Final report · Dec 12, 2013 · N687MA · Destroyed
  > The 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 WPR14FA024](https://openairdocs.org/ntsb/WPR14FA024.md): Cessna 208 · Wailea, HI · Accident · No injuries · Field investigation · Final report · Oct 22, 2013 · N861MA · Substantial damage
  > Improper 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 CEN13LA568](https://openairdocs.org/ntsb/CEN13LA568.md): Air Tractor AT 802 · Gould, AR · Accident · No injuries · Limited investigation · Final report · Aug 28, 2013 · N9119B · Substantial damage
  > The failure of a bearing in the fuel control unit, which resulted in fuel starvation and a total loss of engine power.
- [NTSB CEN13LA473](https://openairdocs.org/ntsb/CEN13LA473.md): Air Tractor AT-502B · Nauvoo, IL · Accident · No injuries · Limited investigation · Final report · Jul 15, 2013 · N6113C · Substantial damage
  > A fatigue failure of an engine compressor turbine blade, which resulted in extensive secondary engine damage and a complete loss of engine power.
- [NTSB CEN13FA080](https://openairdocs.org/ntsb/CEN13FA080.md): Cessna 208B · Bryans Corner, OK · Accident · Minor injuries · Field investigation · Final report · Nov 30, 2012 · N1324G · Substantial damage
  > The total loss of engine power as a result of a fractured compressor turbine blade due to fatigue cracking.
- [NTSB WPR12CA069](https://openairdocs.org/ntsb/WPR12CA069.md): Cessna 208 · Mesquite, NV · Accident · Minor injuries · Data collection · Final report · Dec 17, 2011 · N275PM · Substantial damage
  > The pilot's improper preflight planning, which resulted in a loss of engine power due to fuel exhaustion.
- [NTSB CEN10LA437](https://openairdocs.org/ntsb/CEN10LA437.md): Air Tractor AT-602 · Yates City, IL · Accident · Minor injuries · Limited investigation · Final report · Jul 25, 2010 · N8521L · Substantial damage
  > The loss of engine power for undetermined reasons.
- [NTSB CEN10LA298](https://openairdocs.org/ntsb/CEN10LA298.md): Air Tractor AT-502B · Pollard, AR · Accident · No injuries · Limited investigation · Final report · Jun 4, 2010 · N6083G · Substantial damage
  > A loss of engine power for undetermined reasons.
- [NTSB ERA10IA094](https://openairdocs.org/ntsb/ERA10IA094.md): Cessna 208B · Rome, NY · Incident · No injuries · Incident investigation · Final report · Dec 3, 2009 · N701FX · No damage
  > The operator's inadequate engine wash intervals, which resulted in compressor turbine blade sulphidation and subsequent turbine blade failure.
- [NTSB CEN09CA295](https://openairdocs.org/ntsb/CEN09CA295.md): Air Tractor AT502 · Lisse, TX · Accident · Minor injuries · Data collection · Final report · May 8, 2009 · N248LF · Substantial damage
  > A total loss of engine power for undetermined reasons.
- [NTSB WPR09CA064](https://openairdocs.org/ntsb/WPR09CA064.md): Air Tractor AT-502 · Dinuba, CA · Accident · No injuries · Data collection · Final report · Dec 16, 2008 · N1035F · Substantial damage
  > The 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 CHI08CA257](https://openairdocs.org/ntsb/CHI08CA257.md): Air Tractor AT-400A · Luverne, MN · Accident · No injuries · Data collection · Final report · Aug 16, 2008 · N7307W · Substantial damage
  > The 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 CHI08CA217](https://openairdocs.org/ntsb/CHI08CA217.md): Grumman G-164A · Veedersburg, IN · Accident · No injuries · Data collection · Final report · Jul 28, 2008 · N9892 · Substantial damage
  > The 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 DEN08LA125](https://openairdocs.org/ntsb/DEN08LA125.md): Air Tractor AT-402B · Deerfield, KS · Accident · Minor injuries · Limited investigation · Final report · Jul 20, 2008 · N61318 · Destroyed
  > The 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.

## 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 ('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
```

This list as a web page: https://openairdocs.org/ntsb-events/341/cases?engine=52032

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