# NTSB investigations: Robinson Helicopter R22 ALPHA, CA

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 LAX99LA186](https://openairdocs.org/ntsb/LAX99LA186.md): Robinson R22A · San Luis Obispo, CA · Accident · Minor injuries · Limited investigation · Final report · May 19, 1999 · N8558N · Substantial damage
  > The student's inadvertent and uncoordinated application of forward cyclic during an autorotation flare, which resulted in a loss of main rotor rpm; and the flight instructor's inadequate supervision.
- [NTSB LAX98FA098](https://openairdocs.org/ntsb/LAX98FA098.md): Robinson R22 · Littlerock, CA · Accident · 1 fatal · Field investigation · Final report · Feb 26, 1998 · N8457J · Destroyed
  > The pilot's improper use of the rotorcraft cyclic control in response to encountering terrain induced turbulence. A factor in the accident was the pilot's failure to obtain a preflight weather briefing which contained precautionary notices for turbulence.
- [NTSB LAX91LA097](https://openairdocs.org/ntsb/LAX91LA097.md): Robinson R22A · Piru, CA · Accident · No injuries · Limited investigation · Final report · Feb 10, 1991 · N8491A · Substantial damage
  > Failure of the CFI to maintain main rotor RPM during a demonstrated autorotation.
- [NTSB LAX90LA204](https://openairdocs.org/ntsb/LAX90LA204.md): Robinson R22A · Torrance, CA · Accident · No injuries · Limited investigation · Final report · May 30, 1990 · N8557Z · Substantial damage
  > This accident was a dynamic roll over due to the right skid encountering soft soil during the forced landing.
- [NTSB LAX90LA074](https://openairdocs.org/ntsb/LAX90LA074.md): Robinson R22 · Ramona, CA · Accident · No injuries · Limited investigation · Final report · Jan 21, 1990 · N2258R · Substantial damage
  > The pilot encountered a tailwind while on final approach, but delayed the go-around. During the go-around the pilot failed to maintain airspeed and entered a descent (settling with power).
- [NTSB LAX90LA013](https://openairdocs.org/ntsb/LAX90LA013.md): Robinson R22A · Simi Valley, CA · Accident · Minor injuries · Limited investigation · Final report · Oct 26, 1989 · N84817 · Substantial damage
  > Student pilot's failure to maintain the proper altitude.
- [NTSB LAX89FA092](https://openairdocs.org/ntsb/LAX89FA092.md): Robinson R22A · Santa Barbara, CA · Accident · 2 fatal · Field investigation · Final report · Jan 22, 1989 · N8529C · Destroyed
  > Failure of the pilot to maintain adequate altitude, proper airspeed for the reduced visibility, and an adequate visual outlook to avoid a collision with power transmission cable. Contributing to the accident was reduced visibility due to fog.
- [NTSB LAX88FA032](https://openairdocs.org/ntsb/LAX88FA032.md): Robinson R22A · Moraga, CA · Accident · 2 fatal · Field investigation · Final report · Nov 3, 1987 · N8475A · Destroyed
  > A divergence of the main rotor from its normal plane of rotation for an undetermined reason, which resulted in rotor contact with the cockpit area.
- [NTSB LAX83FA226](https://openairdocs.org/ntsb/LAX83FA226.md): Robinson R22 · Torrance, CA · Accident · No injuries · Field investigation · Final report · May 12, 1983 · N83574 · Substantial damage
  > The helicopter was on an FAA certification test flt with a part-time company employee in the left seat as pilot- in-command (PIC). An FAA test plt was in the right seat. The purpose of the flt was to establish new data for the helicopter's height-velocity…

## 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."eventStateOrRegion" = 'CA' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('7640104'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=7640104&state=CA

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