# NTSB investigations: Lycoming IO-720 series, TX

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 WPR26LA218](https://openairdocs.org/ntsb/WPR26LA218.md): Piper PA-24-400 · Graham, TX · Accident · Minor injuries · Class 4 · Limited · Investigation open · Jun 13, 2026 · N400HL · Substantial damage
- [NTSB CEN09LA023](https://openairdocs.org/ntsb/CEN09LA023.md): Piper PA-36-285 · Silverton, TX · Accident · Serious injuries · Limited investigation · Final report · Oct 18, 2008 · N57740 · Substantial damage
  > The pilot's failure to maintain clearance from a transmission wire.
- [NTSB FTW97LA105](https://openairdocs.org/ntsb/FTW97LA105.md): Piper PA-36-375 · Danevang, TX · Accident · No injuries · Limited investigation · Final report · Feb 18, 1997 · N7167E · Substantial damage
  > The utility's company failure to notify affected parties of the downed line, and the pilot's failure to maintain clearance with the downed wire. A factor was the downed wire.
- [NTSB FTW96LA353](https://openairdocs.org/ntsb/FTW96LA353.md): Piper PA-36-300 · Hale Center, TX · Accident · No injuries · Limited investigation · Final report · Aug 20, 1996 · N57831 · Substantial damage
  > the pilot's inadequate preflight planning/preparation and failure to obtain and/or maintain adequate airspeed after takeoff, which resulted in an inadvertent stall/mush. The overweight condition of the airplane and high density altitude were related factors.
- [NTSB FTW82FQG15](https://openairdocs.org/ntsb/FTW82FQG15.md): Piper PA-36 · Floydada, TX · Accident · 1 fatal · Final report · Mar 4, 1982 · N2394Y · Destroyed
  > The aircraft crashed about 500 ft north of the field that was being sprayed. After impact, it traveled about 90 ft on a heading of 060 degrees. Green glass fragments were found at the initial impact point as well as propeller slash marks that were nearby. No…
- [NTSB FTW79FRJ01](https://openairdocs.org/ntsb/FTW79FRJ01.md): Piper PA-24 · Longview, TX · Accident · Serious injuries · Closed · Oct 13, 1978 · N400CW · Substantial damage
- [NTSB FTW78FPA11](https://openairdocs.org/ntsb/FTW78FPA11.md): Piper PA-24 · Paris, TX · Accident · No injuries · Closed · Dec 25, 1977 · N8509P · Substantial damage
- [NTSB FTW77FQG35](https://openairdocs.org/ntsb/FTW77FQG35.md): Piper PA-24 · Sterling City, TX · Accident · No injuries · Closed · May 8, 1977 · N8481P · Substantial damage
- [NTSB FTW73DRG06](https://openairdocs.org/ntsb/FTW73DRG06.md): Piper PA-24 · Pflugerville, TX · Accident · No injuries · Closed · Aug 1, 1972 · N847SP · Substantial damage
- [NTSB FTW71FQD20](https://openairdocs.org/ntsb/FTW71FQD20.md): Dehavilland 6A · Sanderson, TX · Accident · Minor injuries · Closed · Apr 24, 1971 · N1472V · Substantial damage
- [NTSB FTW71FQG29](https://openairdocs.org/ntsb/FTW71FQG29.md): Piper PA-24 · Lubbock, TX · Accident · No injuries · Closed · Aug 29, 1970 · N8468P · Substantial damage
- [NTSB FTW69F0222](https://openairdocs.org/ntsb/FTW69F0222.md): Piper PA-24 · Wink, TX · Accident · No injuries · Closed · Sep 19, 1968 · N8467P · Substantial damage
- [NTSB FTW67F0576](https://openairdocs.org/ntsb/FTW67F0576.md): Piper PA-24 · San Marcos, TX · Accident · No injuries · Closed · Feb 26, 1967 · N8594P · 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."eventStateOrRegion" = 'TX' 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=TX

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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.