# NTSB investigations: Bell-Continental Copters 47G2

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 CEN12LA120](https://openairdocs.org/ntsb/CEN12LA120.md): Continental Copters 47G2 · Lohn, TX · Accident · Serious injuries · Limited investigation · Final report · Jan 1, 2012 · N9021R · Substantial damage
  > The improper installation of the tail rotor gearbox by maintenance personnel, which led to accelerated wear of the ring and pinion gears, resulting in the loss of tail rotor effectiveness and subsequent forced landing.
- [NTSB LAX99LA047](https://openairdocs.org/ntsb/LAX99LA047.md): Bell 47G2 · Helendale, CA · Accident · No injuries · Limited investigation · Final report · Dec 12, 1998 · N9021R · Substantial damage
  > The pilot's failure to follow proper procedures to recover from main rotor blade aerodynamic retreating blade stall.
- [NTSB LAX97LA285](https://openairdocs.org/ntsb/LAX97LA285.md): Bell 47G2 · Mojave, CA · Accident · No injuries · Limited investigation · Final report · Aug 12, 1997 · N9021R · Substantial damage
  > The student's improper use of the throttle and collective controls and the flight instructor's inadequate supervision of the flight.
- [NTSB NYC72FHJ01](https://openairdocs.org/ntsb/NYC72FHJ01.md): Bell-Cci 47G2 · Amityville, NY · Accident · No injuries · Closed · Jul 11, 1971 · N9021R · Substantial damage

## 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.aircraft_model_code IN ('1181069'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=1181069

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