# NTSB investigations: Pratt & Whitney Canada PT6T-6

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 WPR19LA255](https://openairdocs.org/ntsb/WPR19LA255.md): Sikorsky S58 · Azusa, CA · Accident · No injuries · Class 3 · Limited · Final report · Sep 11, 2019 · N1168U · Substantial damage
  > The in-flight separation of a section of the tail rotor blade due to a fatigue crack, which resulted in the pilot’s forced autorotation into a field.
- [NTSB CHI04LA047](https://openairdocs.org/ntsb/CHI04LA047.md): Sikorsky S-58JT · Ypsilanti, MI · Accident · Minor injuries · Limited investigation · Final report · Dec 22, 2003 · N598S · Destroyed
  > The pilot became disoriented and attempted to land the helicopter at the wrong ramp resulting in his failure to maintain obstacle clearance during the approach. The light poles were a factor to the accident.
- [NTSB LAX03FA232](https://openairdocs.org/ntsb/LAX03FA232.md): Sikorsky S-58ET · Rancho P.Verdes, CA · Accident · Serious injuries · Field investigation · Final report · Jul 12, 2003 · N15AH · Destroyed
  > A total loss of antitorque control, due to the fatigue-induced failure of a gear within the drive shaft's intermediate gear box (IGB). Contributing factors were the pilot's improper on-ground decision to continue flight operations following discovery of…
- [NTSB CHI02FA189](https://openairdocs.org/ntsb/CHI02FA189.md): Sikorsky S-58ET · Brookville, IN · Accident · 1 fatal · Field investigation · Final report · Jul 10, 2002 · N580US · Substantial damage
  > The pilot's intentional low altitude fight and his failure to maintain clearance from power transmission lines. Factors to the accident were the power transmission lines followed by the inability to control the aircraft after the collision with power…
- [NTSB CHI92TL#02](https://openairdocs.org/ntsb/CHI92TL%2302.md): Sikorsky S-58ET · North Platte, NE · Accident · No injuries · Class 3 · Final report · Aug 27, 1992 · N58ET · Substantial damage
- [NTSB LAX89FA160](https://openairdocs.org/ntsb/LAX89FA160.md): Sikorsky S-58ET · Santa Ana, CA · Accident · Minor injuries · Field investigation · Final report · Apr 15, 1989 · N1168U · Substantial damage
  > Failure of the landing gear resulting from excessive loading during ground operations, and fatigue cracking.
- [NTSB LAX81FA006](https://openairdocs.org/ntsb/LAX81FA006.md): Sikorsky S58DT · Lovelock, NV · Accident · 3 fatal · Closed · Oct 17, 1980 · N94523 · Destroyed

## 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 ('52106'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52106

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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.