# NTSB investigations, SD: Powerplant sys/comp malf/fail

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 CEN17IA094](https://openairdocs.org/ntsb/CEN17IA094.md): Eurocopter Deutschland MBB BK 117 C-2 · Sioux Falls, SD · Incident · No injuries · Class 2 · Incident · Final report · Jan 27, 2017 · N911MK · Minor damage
  > The gas generator rear bearing oil scavenge line blocked with coke, which resulted in a failed rear bearing due to an excess of oil lubrication. Contributing to the incident was the operator not completely performing the maintenance items and not utilizing an…
- [NTSB CEN13LA431](https://openairdocs.org/ntsb/CEN13LA431.md): Schweizer 269C · Gary, SD · Accident · Minor injuries · Limited investigation · Final report · Jul 23, 2013 · N7507A · Substantial damage
  > The failure of the engine connecting rod due to fatigue.
- [NTSB CEN13LA220](https://openairdocs.org/ntsb/CEN13LA220.md): Walker Phil RV-6A · Spearfish, SD · Accident · Minor injuries · Limited investigation · Final report · Apr 4, 2013 · N525PW · Substantial damage
  > The coil-distributor wire loosening in flight, which rendered the ignition system inoperative and subsequently caused the loss of engine power.
- [NTSB CEN12LA242](https://openairdocs.org/ntsb/CEN12LA242.md): Bell 407 · Aberdeen, SD · Accident · Minor injuries · Limited investigation · Final report · Apr 14, 2012 · N509MT · Substantial damage
  > The fatigue failure of two turbine engine blades due to vibration.
- [NTSB CEN12FA100](https://openairdocs.org/ntsb/CEN12FA100.md): Cessna 421C · Sioux Falls, SD · Accident · 4 fatal · Field investigation · Final report · Dec 9, 2011 · N421SY · Substantial damage
  > The pilot’s failure to maintain adequate airspeed after shutting down one engine, which resulted in an inadvertent aerodynamic stall and impact with terrain. Contributing to the accident was the pilot’s failure to follow the guidance contained in the pilot’s…
- [NTSB CEN11LA563](https://openairdocs.org/ntsb/CEN11LA563.md): Grumman Acft ENG Cor-Schweizer G-164A · Mansfield, SD · Accident · No injuries · Limited investigation · Final report · Aug 10, 2011 · N127FC · Substantial damage
  > The loss of engine power due to debris in the engine air intake system.

## 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."eventStateOrRegion" = 'SD' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '340' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/340/sequence?state=SD

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