# NTSB investigations: Lycoming HIO-360 series, 2011

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 CEN12CA031](https://openairdocs.org/ntsb/CEN12CA031.md): Hughes 269A · Fort Worth, TX · Accident · No injuries · Data collection · Final report · Oct 14, 2011 · N10375 · Substantial damage
  > The inadvertent entry into ground resonance after a hovering autorotation.
- [NTSB WPR11LA462](https://openairdocs.org/ntsb/WPR11LA462.md): Hughes 269C · Ramona, CA · Accident · No injuries · Limited investigation · Final report · Sep 22, 2011 · N1088Y · Substantial damage
  > The flight instructor’s failure to follow the proper procedure while demonstrating a practice autorotation, which resulted in a total loss of engine power and subsequent hard landing.
- [NTSB ERA11LA428](https://openairdocs.org/ntsb/ERA11LA428.md): Schweizer 269C · Darlington, MD · Accident · Minor injuries · Limited investigation · Final report · Jul 29, 2011 · N39SH · Substantial damage
  > Inadequate maintenance of the helicopter's landing gear dampers, which resulted in a main rotor out-of-balance condition and ground resonance encounter.
- [NTSB WPR11LA325](https://openairdocs.org/ntsb/WPR11LA325.md): Hughes 269C · Wenatchee, WA · Accident · Minor injuries · Limited investigation · Final report · Jul 12, 2011 · N3623Z · Substantial damage
  > The pilot's failure to maintain control while hovering out of ground effect at low altitude, which resulted in the helicopter settling into trees.
- [NTSB CEN11CA442](https://openairdocs.org/ntsb/CEN11CA442.md): Schweizer 269C · Katy, TX · Accident · No injuries · Data collection · Final report · Jul 3, 2011 · N72DC · Substantial damage
  > The pilot's failure to maintain adequate rotor rpm during a low-altitude maneuvering flight.
- [NTSB CEN11LA414](https://openairdocs.org/ntsb/CEN11LA414.md): Enstrom F-28C-2 · Blair, NE · Accident · No injuries · Limited investigation · Final report · Jun 23, 2011 · N5694A · Substantial damage
  > The failure of a tail rotor pitch change link due to the retaining bolt becoming separated in flight. Contributing to the accident was the pilot’s inadequate preflight inspection.
- [NTSB CEN11LA397](https://openairdocs.org/ntsb/CEN11LA397.md): Schweizer 269C · Grand Forks, ND · Accident · No injuries · Limited investigation · Final report · Jun 15, 2011 · N2077E · Substantial damage
  > The student pilot's inadequate recovery from an autorotation and the CFI's delayed remedial action.
- [NTSB WPR11CA250](https://openairdocs.org/ntsb/WPR11CA250.md): Schweizer 269C · Las Vegas, NV · Accident · Serious injuries · Data collection · Final report · Jun 4, 2011 · N6128U · Substantial damage
  > The pilot's failure to maintain adequate clearance from terrain while attempting a transition from hovering flight to forward flight over a mesa in windy, downdraft conditions.
- [NTSB ERA11LA116](https://openairdocs.org/ntsb/ERA11LA116.md): Schweizer 269C-1 · Stuart, FL · Accident · No injuries · Limited investigation · Final report · Jan 15, 2011 · N21086 · Substantial damage
  > The student pilot's inadvertent activation of the collective control, which allowed the helicopter to become airborne and impact the ramp.

## 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") = 2011
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41524'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41524&year=2011

---
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.