# NTSB investigations: Lycoming VO-435 series: Hard landing

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 FTW04CA207](https://openairdocs.org/ntsb/FTW04CA207.md): Bell 47G-3B-1 · Troy, TX · Accident · No injuries · Data collection · Final report · Aug 5, 2004 · N47713 · Substantial damage
  > The flight instructor's improper flare, resulting in a hard landing. A contributing factor was the high density altitude.
- [NTSB LAX96LA326](https://openairdocs.org/ntsb/LAX96LA326.md): Bell 47-G5 · Riverside, CA · Accident · No injuries · Limited investigation · Final report · Aug 30, 1996 · N57RA · Substantial damage
  > The pilot's inaccurate perception of altitude which resulted in an improper flare and subsequent hard landing, and non use of the landing light.
- [NTSB CHI94LA133](https://openairdocs.org/ntsb/CHI94LA133.md): Bell 47-62 · Aurora, MO · Accident · No injuries · Limited investigation · Final report · Mar 5, 1994 · N6711D · Substantial damage
  > The dual students inadequate flare and the pilot in command's (flight instructor) delayed remedial action.
- [NTSB CHI93LA320](https://openairdocs.org/ntsb/CHI93LA320.md): Bell 47-G5 · Schaumburg, IL · Accident · Minor injuries · Limited investigation · Final report · Aug 12, 1993 · N1347X · Substantial damage
  > the pilot's improper autorotation techniques.
- [NTSB CHI90LA205](https://openairdocs.org/ntsb/CHI90LA205.md): Bell 47G-5 · Hudson, IA · Accident · No injuries · Limited investigation · Final report · Jul 30, 1990 · N8140J · Substantial damage
  > Improper touchdown performed by the pilot in command.
- [NTSB ATL87LA249](https://openairdocs.org/ntsb/ATL87LA249.md): Bell 47G3B1 · Enterprise, AL · Accident · No injuries · Limited investigation · Final report · Sep 6, 1987 · N38CD · Substantial damage
  > During a practice autorotation, the instructor pilot delayed in appling power to arrest the autorotative descent. The other pilot reported that the autorotation profile was was not the same as the previous successful autorotation. There were no reported…
- [NTSB LAX84LA462](https://openairdocs.org/ntsb/LAX84LA462.md): Bell 47G-2 · El Cajon, CA · Accident · No injuries · Limited investigation · Final report · Aug 29, 1984 · N18807 · Substantial damage
  > The helicopter made a hard landing during a test flt. The plt reported that the collective was very stiff and he was notable to stop the descent during landing. FAA inspected the helicopter after the accident and found no discrepancies in the control system…
- [NTSB ANC83LA035](https://openairdocs.org/ntsb/ANC83LA035.md): Bell 47G-2 · Anchorage, AK · Accident · Minor injuries · Limited investigation · Final report · Jan 19, 1983 · N2822B · Substantial damage
  > The helicopter made a landing during which the tail boom was severed. This was a dual instructional flight and accordingto the instructor, a high reconnaissance was performed before selecting their approach to the pinnacle. The pinnacle is a 3000 foot 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 ('41525')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 200))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41525&occurrence=200

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