# NTSB investigations: Pratt & Whitney PT6A series, 2011

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 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 ENG12IA013](https://openairdocs.org/ntsb/ENG12IA013.md): Beech 1900D · Denver International Airport, CO · Incident · No injuries · Incident investigation · Final report · Dec 3, 2011 · N247GL · Minor damage
  > A failure of the nose landing gear end cap due to fatigue. Contributing to the failure were the ineffective inspection and the unknown effect of grain direction on fatigue life.
- [NTSB ERA12CA003](https://openairdocs.org/ntsb/ERA12CA003.md): Air Tractor AT-502B · Fort Pierce, FL · Accident · Serious injuries · Data collection · Final report · Oct 4, 2011 · N90805 · Substantial damage
  > The pilot's delayed decision to abort the takeoff.
- [NTSB CEN11LA593](https://openairdocs.org/ntsb/CEN11LA593.md): Air Tractor AT-400 · Monango, ND · Accident · Serious injuries · Limited investigation · Final report · Aug 23, 2011 · N23720 · Substantial damage
  > The pilot did not maintain adequate separation from a tree during the aerial-application flight.
- [NTSB WPR11LA388](https://openairdocs.org/ntsb/WPR11LA388.md): Air Tractor AT-602 · Pine Bluffs, WY · Accident · Minor injuries · Limited investigation · Final report · Aug 17, 2011 · N8518Y · Substantial damage
  > The pilot's failure to maintain clearance from power lines during an aerial application flight.
- [NTSB CEN11LA571](https://openairdocs.org/ntsb/CEN11LA571.md): Air Tractor AT-402 · Uvalde, TX · Accident · No injuries · Limited investigation · Final report · Aug 13, 2011 · N10119 · Substantial damage
  > The pilot’s failure to maintain airspeed while maneuvering to avoid power lines during a precautionary landing, which resulted an aerodynamic stall. Contributing to the accident was the fluctuating engine power for undetermined reasons and the pilot's…
- [NTSB WPR11LA278](https://openairdocs.org/ntsb/WPR11LA278.md): Air Tractor AT-502 · Blackfoot, ID · Accident · No injuries · Limited investigation · Final report · Jun 21, 2011 · N1515P · Substantial damage
  > A partial loss of engine power during takeoff for undetermined reasons.
- [NTSB CEN11LA404](https://openairdocs.org/ntsb/CEN11LA404.md): Ayres S2R-T34 · Athleimer, AR · Accident · Minor injuries · Limited investigation · Final report · Jun 16, 2011 · N30902 · Substantial damage
  > Failure of the first stage planetary gearset in the propeller reduction gearbox, which resulted in catastrophic engine failure. Contributing to the failure was the misrepresentation of the gearset being zero-timed by the company that sold the gearset to the…
- [NTSB WPR11CA252](https://openairdocs.org/ntsb/WPR11CA252.md): Air Tractor AT-502B · Odessa, WA · Accident · No injuries · Data collection · Final report · Jun 7, 2011 · N6072X · 2 aircraft · Minor damage
  > The pilot's failure to maintain clearance from the other aircraft.
- [NTSB WPR11LA245](https://openairdocs.org/ntsb/WPR11LA245.md): Piper PA-46-310P · Lake Havasu, AZ · Accident · No injuries · Limited investigation · Final report · Jun 2, 2011 · N712MK · Substantial damage
  > The failure of the low pressure switch in the normal landing gear system, which prevented normal operation of that system, and the misrigging of the emergency extension gear release valve, which prevented the system from being depressurized to allow for the…
- [NTSB ANC11LA048](https://openairdocs.org/ntsb/ANC11LA048.md): Dehavilland DHC-3T · Bettles Field, AK · Accident · No injuries · Limited investigation · Final report · May 28, 2011 · N87AW · Substantial damage
  > The pilot's selection of unsuitable terrain for the landing, which resulted in a loss of directional control.
- [NTSB ERA11LA298](https://openairdocs.org/ntsb/ERA11LA298.md): Thrush S2R-T660 · Greenwood, MS · Accident · No injuries · Limited investigation · Final report · May 13, 2011 · N660KP · Substantial damage
  > A partial loss of engine power during low-altitude maneuvering for undetermined reasons.
- [NTSB WPR11CA222](https://openairdocs.org/ntsb/WPR11CA222.md): Thrush S2R-T34 · Pleasant Grove, CA · Accident · No injuries · Data collection · Final report · May 11, 2011 · N510CW · Substantial damage
  > The pilot's failure to maintain directional control during the landing.
- [NTSB WPR11FA221](https://openairdocs.org/ntsb/WPR11FA221.md): Air Tractor AT-802A · Miles City, MT · Accident · 1 fatal · Field investigation · Final report · May 9, 2011 · N8523H · Substantial damage
  > The pilot's continued visual flight rules flight into deteriorating weather conditions in an airplane not equipped for instrument flight, which resulted in a collision with terrain.
- [NTSB CEN11LA323](https://openairdocs.org/ntsb/CEN11LA323.md): Air Tractor AT-402A · Arriba, CO · Accident · Serious injuries · Limited investigation · Final report · May 5, 2011 · N5192F · Substantial damage
  > The pilot’s controlled flight into terrain for undetermined reasons.
- [NTSB WPR11LA218](https://openairdocs.org/ntsb/WPR11LA218.md): Piper PA46-500TP · Rock Springs, WY · Accident · No injuries · Limited investigation · Final report · May 3, 2011 · N46ME · Substantial damage
  > The overstress fracture of the right aileron midspan hinge bracket due to modal vibrations created by a deflated right main landing gear tire during the takeoff roll.
- [NTSB CEN11CA309](https://openairdocs.org/ntsb/CEN11CA309.md): Cessna 208B · El Paso, TX · Accident · No injuries · Data collection · Final report · Apr 27, 2011 · N208TF · Substantial damage
  > The pilot's loss of control as result of the gusting wind.
- [NTSB CEN11LA296](https://openairdocs.org/ntsb/CEN11LA296.md): Air Tractor AT-802A · New Madrid, MO · Accident · Serious injuries · Limited investigation · Final report · Apr 19, 2011 · N802KC · 2 aircraft · Substantial damage
  > The failure of both pilots to see and avoid the other airplane, which resulted in a midair collision.
- [NTSB CEN11CA287](https://openairdocs.org/ntsb/CEN11CA287.md): Air Tractor AT503 · Telephone, TX · Accident · Minor injuries · Data collection · Final report · Apr 13, 2011 · N503AD · Substantial damage
  > The pilot's failure to maintain adequate airspeed which resulted in an aerodynamic stall.
- [NTSB CEN11CA224](https://openairdocs.org/ntsb/CEN11CA224.md): Ayres S2R-T34 · Swan Lake, AR · Accident · Minor injuries · Data collection · Final report · Mar 12, 2011 · N92KM · Substantial damage
  > An in-flight collision with power lines following an encounter with a wind gust.
- [NTSB WPR11FA158](https://openairdocs.org/ntsb/WPR11FA158.md): Cessna 208B · Bakersfield, CA · Accident · No injuries · Field investigation · Final report · Mar 10, 2011 · N930FE · Substantial damage
  > The malfunction of a master brake cylinder, which resulted in a loss of braking action and subsequent loss of directional control and collision with three vehicles during taxi. Contributing to the accident was the inappropriate design and manufacture of the…
- [NTSB ERA11FA183](https://openairdocs.org/ntsb/ERA11FA183.md): Dehavilland DHC-6-100 · Hampton, GA · Accident · 2 fatal · Field investigation · Final report · Mar 8, 2011 · N157KM · Substantial damage
  > The pilot did not maintain airspeed while maneuvering, which resulted in an aerodynamic stall.
- [NTSB ANC11LA009](https://openairdocs.org/ntsb/ANC11LA009.md): Cessna 208B · Kipnuk, AK · Accident · No injuries · Limited investigation · Final report · Jan 6, 2011 · N715HE · Substantial damage
  > The pilot’s decision to land long on the icy snow-covered runway, resulting in a runway excursion and collision with terrain.

## 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 year(c."eventDate") = 2011
  AND 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'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52032&year=2011

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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.