# NTSB investigations, 2014: Ground resonance

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 ERA14LA293](https://openairdocs.org/ntsb/ERA14LA293.md): Schweizer 269C-1 · Allentown, PA · Accident · Minor injuries · Limited investigation · Final report · Jun 17, 2014 · N152CC · Substantial damage
  > Inadequate inspection and maintenance of the helicopter’s landing gear dampers, which resulted in ground resonance during helicopter shutdown.
- [NTSB ANC14LA041](https://openairdocs.org/ntsb/ANC14LA041.md): Airbus/Eurocopter AS 350 B3 · Anchorage, AK · Accident · No injuries · Class 3 · Limited · Final report · Jun 11, 2014 · N356EV · Substantial damage
  > The pilot’s improper engine start procedure, which resulted in an overspeed of the engine and main rotor drive system.
- [NTSB CEN14LA269](https://openairdocs.org/ntsb/CEN14LA269.md): Schweizer 269C · Temple, TX · Accident · No injuries · Limited investigation · Final report · May 31, 2014 · N902CP · Substantial damage
  > Ground resonance due to maintenance personnel’s improper inspection of the landing gear dampers, which resulted in the dampers operating outside of allowable limits.

## 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") = 2014
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '232' 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/232/sequence?year=2014

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