# NTSB investigations: Allison 250-C20 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 SEA07CA139](https://openairdocs.org/ntsb/SEA07CA139.md): Hughes 369D · Torrance, CA · Accident · No injuries · Data collection · Final report · May 29, 2007 · N935M · Substantial damage
  > The pilot's loss of helicopter control while maneuvering at low altitude, which resulted in a hard landing. The wind gusts were a contributing factor.
- [NTSB LAX07CA177](https://openairdocs.org/ntsb/LAX07CA177.md): MD Helicopters 500-E · Yerington, NV · Accident · Minor injuries · Data collection · Final report · May 27, 2007 · N526BH · Substantial damage
  > The failure of the student and instructor to maintain an adequate main rotor rpm, and the instructor’s inadequate in-flight supervision while conducting a low-level simulated emergency procedure, which resulted in a hard landing.
- [NTSB ATL03LA095](https://openairdocs.org/ntsb/ATL03LA095.md): Aerospatiale AS355F2 · Bainbridge, GA · Accident · No injuries · Limited investigation · Final report · May 17, 2003 · N42AT · Substantial damage
  > The pilot's improper flare during an attempted landing.
- [NTSB FTW03LA147](https://openairdocs.org/ntsb/FTW03LA147.md): Bell 206B · Hurst, TX · Accident · No injuries · Limited investigation · Final report · May 7, 2003 · N81519 · Substantial damage
  > The improper flare by the pilot receiving instruction, which resulted in the hard landing. A contributing factor was the flight instructor's inadequate supervision.
- [NTSB NYC02LA105](https://openairdocs.org/ntsb/NYC02LA105.md): Bell 206 · Columbus, OH · Accident · No injuries · Limited investigation · Final report · May 30, 2002 · N820H · Substantial damage
  > The flight instructor's delay in applying remedial action. A factor in the accident was the pilot allowing the rotor rpm to become too low during the deceleration and touchdown phase of the autorotation.
- [NTSB IAD01TA051](https://openairdocs.org/ntsb/IAD01TA051.md): Hughes 369D · Taylorsville, KY · Accident · Minor injuries · Final report · Apr 29, 2001 · N50AP · Substantial damage
  > the flight instructor's inadequate aircraft control during a practice autorotation which resulted in a hard landing.
- [NTSB FTW98LA235](https://openairdocs.org/ntsb/FTW98LA235.md): Bell 206BIII · Hurst, TX · Accident · No injuries · Limited investigation · Final report · May 21, 1998 · N206TA · Substantial damage
  > The pilot's delayed recovery from a simulated autorotative landing.
- [NTSB NYC97LA041](https://openairdocs.org/ntsb/NYC97LA041.md): Bell 206A · Linden, NJ · Accident · No injuries · Limited investigation · Final report · Jan 3, 1997 · N555SJ · Substantial damage
  > the pilot allowing the rotor RPM to decay and his failure to take remedial action in time to recover the autorotation.
- [NTSB NYC95LA198](https://openairdocs.org/ntsb/NYC95LA198.md): Bell 206B · Bingham, ME · Accident · Minor injuries · Limited investigation · Final report · Aug 18, 1995 · N16915 · Destroyed
  > the pilot's inadequate landing flare resulting in a hard landing and roll over, and a subsequent collision with trees.
- [NTSB SEA92LA088](https://openairdocs.org/ntsb/SEA92LA088.md): Hughes 369E · Hillsboro, OR · Accident · No injuries · Limited investigation · Final report · May 1, 1992 · N5211Y · Substantial damage
  > The pilot in command's excessive application of collective.
- [NTSB SEA91FA124](https://openairdocs.org/ntsb/SEA91FA124.md): Bell 206BII · Brewster, WA · Accident · No injuries · Field investigation · Final report · May 28, 1991 · N90307 · Substantial damage
  > The pilot-in-command's selection of unsuitable terrain for the emergency simulation.
- [NTSB ATL89FA051](https://openairdocs.org/ntsb/ATL89FA051.md): Bell 206B · Pinson, AL · Accident · No injuries · Field investigation · Final report · Dec 2, 1988 · N3TV · Substantial damage
  > Two FAA inspectors were conducting currency training when the helicopter landed hard during a practice power recovery autorotation. The pilot had delayed in applying power and collective pitch. Upon contact with the ground, all engine instruments indicated…
- [NTSB CHI87LA180](https://openairdocs.org/ntsb/CHI87LA180.md): Hughes 369HS · Griffith, IN · Accident · No injuries · Limited investigation · Final report · Jul 30, 1987 · N42405 · Substantial damage
  > The tail boom of the helicopter was severed after rotor blade contact during a hard landing. The acc occurred during an autorotation demo for the police dept with a power recovery. Application of power was late and the helicopter landed hard and bounced. The…
- [NTSB LAX87LA157](https://openairdocs.org/ntsb/LAX87LA157.md): McDonnell Douglas 369E · Phoenix, AZ · Accident · No injuries · Limited investigation · Final report · Mar 19, 1987 · N1601Y · Substantial damage
  > During factory flt training, prior to delivery of the new helicopter to the owner, the CFI said he asked the student to perform a series of emergency procedures which included quick stops from an initial takeoff followed by hovering autorotations. The CFI…

## 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 ('03020')
    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=03020&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.