# NTSB investigations: Lycoming IO-540-W1A5

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 WPR26LA035](https://openairdocs.org/ntsb/WPR26LA035.md): Maule M-7-235A · Friday Harbor, WA · Accident · No injuries · Class 3 · Limited · Preliminary report · Oct 31, 2025 · N9234N · Substantial damage
  > On October 31, 2025, at about 1227 Pacific daylight time, a Maule M-7-235A, N9234N, was substantially damaged when it was involved in an accident at Friday Harbor Airport (FHR), Friday Harbor, Washington. The pilot was not injured. The airplane was operated…
- [NTSB CEN21LA183](https://openairdocs.org/ntsb/CEN21LA183.md): Maule MT7 · Jewett, TX · Accident · Minor injuries · Class 4 · Limited · Final report · Apr 5, 2021 · N811SG · Substantial damage
  > The pilot’s failure to maintain control of the airplane after it struck a hidden berm during the intentional off-airport landing, which resulted in a hard landing.
- [NTSB ERA20LA134](https://openairdocs.org/ntsb/ERA20LA134.md): Maule MT-7 · Swansboro, NC · Accident · 2 fatal · Class 3 · Limited · Final report · Mar 24, 2020 · N899ZZ · Destroyed
  > The airplane’s turning descent into water while enroute in night instrument meteorological conditions for reasons that could not be determined.
- [NTSB SEA08CA074](https://openairdocs.org/ntsb/SEA08CA074.md): Maule M-7-235 · Red Lodge, MT · Accident · No injuries · Data collection · Final report · Feb 10, 2008 · N997RM · Substantial damage
  > The pilot's inadequate compensation for the crosswind and failure to maintain directional control during the landing roll.
- [NTSB DFW06CA215](https://openairdocs.org/ntsb/DFW06CA215.md): Maule MT-7 · Ponca, AR · Accident · No injuries · Data collection · Final report · Sep 15, 2006 · N143RM · Substantial damage
  > The pilot's improper flare resulting in a hard landing.

## 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 ('41660'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41660

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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.