# NTSB investigations: Allison 250-C30 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 DFW06CA058](https://openairdocs.org/ntsb/DFW06CA058.md): Bell 206L-4 · Fort Worth, TX · Accident · No injuries · Data collection · Final report · Jan 25, 2006 · N225GH · Substantial damage
  > The flight instructors failure to maintain main rotor RPM and improper flare, which resulted in a hard landing.
- [NTSB LAX01LA292](https://openairdocs.org/ntsb/LAX01LA292.md): Bell 206-L4 · Mesa, AZ · Accident · No injuries · Limited investigation · Final report · Aug 28, 2001 · N995PM · Substantial damage
  > The pilot's improper autorotation in that he failed to attain the proper descent rate resulting in a hard landing and subsequent airframe damage. A factor was the high temperature.
- [NTSB LAX00LA024](https://openairdocs.org/ntsb/LAX00LA024.md): Bell 206-L4 · Santa Clarita, CA · Accident · No injuries · Limited investigation · Final report · Oct 23, 1999 · N36R · Substantial damage
  > The pilot's delay in adding power during a power-on recovery from an autorotation, which resulted in a hard landing and rollover. The flight instructor's inadequate supervision of the flight was also causal.
- [NTSB NYC86IA109](https://openairdocs.org/ntsb/NYC86IA109.md): Sikorsky S-76 · Atlantic City, NJ · Incident · No injuries · Incident investigation · Final report · Mar 20, 1986 · N38 · Minor damage
  > During a preflight examination of a Sikorsky S76 the instructor and student discovered a hole in the leading edge of the pylon above the intermediate gear box and scuff mark on the main rotor blade caps. The instructor and student had just completed a 2.1 hr…

## 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 ('03015')
    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=03015&occurrence=200

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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.