# NTSB investigations: Turbomeca ARRIEL-1SER: Loss of control - in flight

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 NYC07MA073](https://openairdocs.org/ntsb/NYC07MA073.md): Aerospatiale AS350BA · Princeville, HI · Accident · 4 fatal · Major investigation · Final report · Mar 9, 2007 · N354NT · Substantial damage
  > The failure of maintenance personnel to properly tighten (torque) the flight control servo lower attachment clevis, and reinstall a functioning lock washer, which resulted in a flight control disconnect and a complete loss of helicopter control. Contributing…
- [NTSB IAD05MA078](https://openairdocs.org/ntsb/IAD05MA078.md): Sikorsky S-76C · New York, NY · Accident · Serious injuries · Major investigation · Final report · Jun 17, 2005 · N317MY · Substantial damage
  > An inadvertent encounter with a left quartering tailwind. Factors in the accident were settling with power, the high gross weight of the helicopter, and the crew's failure to accurately assess the winds in the area.
- [NTSB LAX05GA192](https://openairdocs.org/ntsb/LAX05GA192.md): Eurocopter AS 350 B2 · Bisbee, AZ · Accident · Serious injuries · Final report · Jun 2, 2005 · N5205F · Substantial damage
  > the pilot's failure to maintain an adequate forward airspeed, which resulted in an in-flight loss of control due to a loss of tail rotor effectiveness, while operating near the out of ground effect hover capability of the helicopter. Contributing factors to…
- [NTSB LAX05FA053](https://openairdocs.org/ntsb/LAX05FA053.md): Eurocopter AS-350-B3 · Apache Junction, AZ · Accident · 1 fatal · Field investigation · Final report · Dec 15, 2004 · N971AE · Substantial damage
  > A loss of control during the final approach to land for undetermined reasons.
- [NTSB LAX05LA020](https://openairdocs.org/ntsb/LAX05LA020.md): American Eurocopter AS350-BA · Oxnard, CA · Accident · Minor injuries · Limited investigation · Final report · Nov 9, 2004 · N655TV · Substantial damage
  > The inadvertent in-flight engagement of the collective down lock, which resulted in an uncontrolled descent and ground impact. The collective down lock engagement was likely due to a combination of the reduced clearance between the lock plate and the…
- [NTSB LAX04LA254](https://openairdocs.org/ntsb/LAX04LA254.md): Eurocopter AS-350-B2 · Scottsdale, AZ · Accident · Minor injuries · Limited investigation · Final report · Jul 1, 2004 · N513TS · Destroyed
  > Inadvertent in-flight engagement of the collective down lock, which resulted in an uncontrolled descent and ground impact. The collective down lock engagement was caused by the improper installation and/or adjustment of the collective locking system, which…
- [NTSB DEN03LA020](https://openairdocs.org/ntsb/DEN03LA020.md): Aerospatiale AS-350BA · Monticello, UT · Accident · Minor injuries · Limited investigation · Final report · Dec 2, 2002 · N20840 · Substantial damage
  > the pilot's failure to maintain rotor rpm. A related factor was the presence of an object in the path during the touchdown.
- [NTSB ATL02LA097](https://openairdocs.org/ntsb/ATL02LA097.md): Aerospatiale 350B · Gainesville, GA · Accident · No injuries · Limited investigation · Final report · May 13, 2002 · N696CH · Substantial damage
  > The check airman’s failure to follow prescribed procedures that resulted in the lost of control and subsequent in-flight collision with the terrain. A factor was gusting wind conditions.
- [NTSB LAX01MA272](https://openairdocs.org/ntsb/LAX01MA272.md): Eurocopter AS350-B2 · Meadview, AZ · Accident · 6 fatal · Major investigation · Final report · Aug 10, 2001 · N169PA · Destroyed
  > The pilot’s loss of control of the helicopter for undetermined reasons.
- [NTSB LAX00LA195](https://openairdocs.org/ntsb/LAX00LA195.md): Eurocopter AS350B2 · Mesa, AZ · Accident · No injuries · Limited investigation · Final report · May 11, 2000 · N851HW · Substantial damage
  > the instructor pilot's failure to maintain control of the helicopter.
- [NTSB LAX99LA282](https://openairdocs.org/ntsb/LAX99LA282.md): Aerospatiale AS350BA · Kahului, HI · Accident · No injuries · Limited investigation · Final report · Aug 24, 1999 · N6094S · Substantial damage
  > The pilot's initial misjudgment of the wind speed and his decision to continue a downwind landing approach when his speed and altitude profile was inadequate, and his failure to maintain main rotor rpm, resulting in settling with power and a hard 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 ('60030')
    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" = 250))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=60030&occurrence=250

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