# NTSB investigations: Lycoming IO-540 series, 2026

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 CEN26LA317](https://openairdocs.org/ntsb/CEN26LA317.md): Robinson Helicopter R44 II · Natchez, MS · Accident · No injuries · Class 4 · Limited · Final report · Sep 13, 2026 · N7527L · Substantial damage
  > The pilot’s failure to complete a preflight weight and balance calculation, which resulted in a center of gravity beyond the forward limit, and adversely affected the helicopter’s controllability during takeoff.
- [NTSB WPR26LA306](https://openairdocs.org/ntsb/WPR26LA306.md): Aero Rampart Steen Skybolt · Roseburg, OR · Accident · No injuries · Class 4 · Limited · Investigation open · Aug 15, 2026 · N32DA · Substantial damage
- [NTSB ERA26LA296](https://openairdocs.org/ntsb/ERA26LA296.md): Piper PA32 · Dawsonville, GA · Accident · Serious injuries · Class 3 · Limited · Investigation open · Aug 9, 2026 · N3011X
- [NTSB ERA26FA271](https://openairdocs.org/ntsb/ERA26FA271.md): Smith Aerostar 601 · Lake Clear, NY · Accident · 3 fatal · Class 3 · Field · Preliminary report · Jul 14, 2026 · N800AA · Destroyed
  > On July 13, 2026, about 2236 eastern daylight time, a Smith Aerostar 601P, N800AA was destroyed when it was involved in an accident near Lake Clear, New York. The private pilot and two passengers were fatally injured. The airplane was operated as a Title 14…
- [NTSB ERA26LA244](https://openairdocs.org/ntsb/ERA26LA244.md): Cessna 182S · Naples, FL · Accident · No injuries · Class 3 · Limited · Preliminary report · Jun 20, 2026 · N7270H · Substantial damage
  > On June 20, 2026 at 1030 eastern daylight time, a Cessna 182S, N7270H, was substantially damaged when it was involved in an accident near Naples, Florida. The pilot and three passengers were uninjured. The airplane was operated as a Title 14 Code of Federal…
- [NTSB WPR26LA228](https://openairdocs.org/ntsb/WPR26LA228.md): Lancair Legacy 2000 · Los Angeles, CA · Accident · Minor injuries · Class 3 · Limited · Preliminary report · Jun 16, 2026 · N84BZ · Substantial damage
  > On June 16, 2026, about 0906 Pacific daylight time, an experimental amateur built Lancair Legacy 2000, N84BZ, was substantially damaged when it was involved in an accident near Los Angeles, California. The pilot sustained minor injuries. The airplane was…
- [NTSB WPR26LA200](https://openairdocs.org/ntsb/WPR26LA200.md): Maule M-7-260C · Kanab, UT · Accident · No injuries · Class 4 · Limited · Final report · May 21, 2026 · N261MM · Substantial damage
  > The pilot’s failure to maintain directional control during the landing roll with gusting crosswind conditions.
- [NTSB GAA26WA181](https://openairdocs.org/ntsb/GAA26WA181.md): Piper PA-23-250 · Cumayasa, La Romana, Dominican Republic · Incident · No injuries · Class 5 · Foreign · Apr 29, 2026 · N63941 · Substantial damage
- [NTSB ANC26LA029](https://openairdocs.org/ntsb/ANC26LA029.md): Maule M-7-235 · Wasilla, AK · Accident · No injuries · Class 3 · Limited · Preliminary report · Apr 3, 2026 · N93ML · Substantial damage
  > On April 3, 2026, at 1300 Alaska daylight time, a Maule M 7 235 airplane, N93ML, was substantially damaged during an accident near Wasilla, Alaska. The pilot and one passenger were not injured. The airplane was operated as a personal flight under the…
- [NTSB CEN26FA147](https://openairdocs.org/ntsb/CEN26FA147.md): Experimental Homebuilt Airshark · Statesboro, GA · Accident · 1 fatal · Class 3 · Field · Preliminary report · Mar 25, 2026 · N220AS · Substantial damage
  > On March 25, 2026, about 1453 eastern daylight time, an experimental homebuilt Airshark airplane, N220AS, was substantially damaged when it was involved in an accident near Statesboro, Georgia. The pilot was fatally injured. The airplane was operated as a…
- [NTSB CEN26LA148](https://openairdocs.org/ntsb/CEN26LA148.md): Robinson Helicopter R44 II · Stonewall, TX · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Mar 24, 2026 · N233JD · Substantial damage
  > On March 24, 2026, about 0930 central daylight time, a Robinson R44 II helicopter, N233JD, was substantially damaged when it was involved in an accident near Stonewall, Texas. The pilot and passenger were seriously injured. The helicopter was operated as a…
- [NTSB CEN26LA122](https://openairdocs.org/ntsb/CEN26LA122.md): Cessna 182 · Golden, MO · Accident · No injuries · Class 4 · Limited · Final report · Feb 21, 2026 · N7276V · Substantial damage
  > The pilot’s failure to establish stabilized approach that would have allowed the airplane to touch down with adequate runway remaining. Contributing to the accident was the pilot’s failure to execute a go-around.
- [NTSB WPR26FA097](https://openairdocs.org/ntsb/WPR26FA097.md): Socata TB21 · Prescott, AZ · Accident · 1 fatal · Class 3 · Field · Preliminary report · Feb 5, 2026 · N967WM · Destroyed
  > On February 4, 2026, about 1950 mountain standard time, a Socata TB21, N967WM, was destroyed when it was involved in an accident near Prescott, Arizona. The pilot was fatally injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91…
- [NTSB CEN26LA101](https://openairdocs.org/ntsb/CEN26LA101.md): Robinson Helicopter R44 II · Sullivan, MO · Accident · Minor injuries · Class 4 · Limited · Final report · Jan 29, 2026 · N916VK · Destroyed
  > The pilot’s failure to maintain clearance from powerlines during low-level operations.
- [NTSB WPR26LA083](https://openairdocs.org/ntsb/WPR26LA083.md): Robinson R44 · Parkman, WY · Accident · No injuries · Class 4 · Limited · Final report · Jan 19, 2026 · N996NR · 2 aircraft · Substantial damage
  > The pilots’ failure to maintain separation while conducting air work in a common operational area. Contributing to the accident was the pilots’ divided attention associated with the mission activity and unreliable radio communications.
- [NTSB WPR26LA084](https://openairdocs.org/ntsb/WPR26LA084.md): Maule M-7-235B · Cody, WY · Accident · No injuries · Class 4 · Limited · Final report · Jan 17, 2026 · N116G · Substantial damage
  > The pilot's failure to maintain directional control during landing roll.

## 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") = 2026
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41530', '41585'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41530&year=2026

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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.