# NTSB investigations: Lycoming IO-720 series, CO

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 FTW97LA061](https://openairdocs.org/ntsb/FTW97LA061.md): Piper PA-24-400 · Broomfield, CO · Accident · No injuries · Limited investigation · Final report · Dec 10, 1996 · N8450P · Substantial damage
  > failure of the pilot to maintain proper alignment with the runway, while landing. A factor relating to the accident was: the variable/gusty wind condition with possible windshear.
- [NTSB DEN91FA039](https://openairdocs.org/ntsb/DEN91FA039.md): Piper PA-24-400 · Snowmass, CO · Accident · 2 fatal · Field investigation · Final report · Feb 8, 1991 · N8510P · Destroyed
  > The pilot's failure to maintain a proper altitude in mountainous terrain.
- [NTSB DEN87LA117](https://openairdocs.org/ntsb/DEN87LA117.md): Piper PA-36-375 · Lamar, CO · Accident · No injuries · Limited investigation · Final report · May 1, 1987 · N2335X · Substantial damage
  > The commercial plt was on takeoff from a dirt strip with a fully loaded ag acft, for an aerial application flt. After lifting off prematurely, the acft settled to the rwy. The left wing struck a post skidding the acft to the left. After crossing an irrigation…
- [NTSB DEN68F0097](https://openairdocs.org/ntsb/DEN68F0097.md): Piper PA-24 · Idaho Sprngs, CO · Accident · Minor injuries · Closed · Aug 3, 1967 · N8487P · Substantial damage

## 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" = 'CO' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41546'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41546&state=CO

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