# NTSB investigations: Robinson Helicopter R66: Low altitude operation/event

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 WPR26FA031](https://openairdocs.org/ntsb/WPR26FA031.md): Robinson Helicopter R66 · Ekalaka, MT · Accident · 4 fatal · Class 3 · Field · Preliminary report · Oct 23, 2025 · N67GA · Substantial damage
  > On October 22, 2025, about 1830 mountain daylight time, a Robinson Helicopter Co. R66, N67GA, was substantially damaged when it was involved in an accident near Ekalaka, Montana. The pilot and 3 passengers were fatally injured. The helicopter was operated as…
- [NTSB CEN22LA387](https://openairdocs.org/ntsb/CEN22LA387.md): Robinson Helicopter R66 · Millville, MN · Accident · No injuries · Class 4 · Limited · Final report · Aug 16, 2022 · N641RZ · Substantial damage
  > The pilot’s inadequate inflight planning resulted in impact with a power line.
- [NTSB CEN22LA006](https://openairdocs.org/ntsb/CEN22LA006.md): Robinson Helicopter R66 · Delta, MO · Accident · Minor injuries · Class 4 · Limited · Final report · Oct 5, 2021 · N266RK · Substantial damage
  > The pilot’s inadequate inflight planning and his failure to see and avoid a wire which resulted in contact with the wire and subsequent ground impact.
- [NTSB CEN21LA421](https://openairdocs.org/ntsb/CEN21LA421.md): Robinson Helicopter R66 · Reynoldsville, IL · Accident · No injuries · Class 4 · Limited · Final report · Sep 15, 2021 · N166LW · Substantial damage
  > The pilot’s failure to maintain clearance from the wire during low altitude operations in windy conditions.
- [NTSB CEN21LA348](https://openairdocs.org/ntsb/CEN21LA348.md): Robinson Helicopter R66 · Merry, NE · Accident · Serious injuries · Class 4 · Limited · Final report · Jul 30, 2021 · N857TL · Substantial damage
  > The pilot’s failure to maintain clearance from a wire during a low-level aerial application flight.
- [NTSB ERA21LA270](https://openairdocs.org/ntsb/ERA21LA270.md): Robinson Helicopter R66 · Waxhaw, NC · Accident · No injuries · Class 4 · Limited · Final report · Jun 27, 2021 · N7078V · Substantial damage
  > The pilot’s failure to maintain clearance from powerlines during a low-level aerial application flight.
- [NTSB ERA20LA220](https://openairdocs.org/ntsb/ERA20LA220.md): Robinson R66 · Pikeville, NC · Accident · 1 fatal · Class 3 · Limited · Final report · Jun 18, 2020 · N4QW · Substantial damage
  > The pilot’s failure to see and avoid a small diameter wire during low altitude agricultural spraying operations. Contributing to the accident was the pilot’s insufficient property survey.
- [NTSB GAA19CA481](https://openairdocs.org/ntsb/GAA19CA481.md): Robinson R66 · Vandalia, IL · Accident · No injuries · Data collection · Final report · Aug 2, 2019 · N1767L · Substantial damage
  > The pilot's failure to maintain clearance from power lines during an agricultural application flight.

## 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 ('7640130')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s.case_mkey = x.case_mkey AND s.aircrafts_position = x.position AND s."tier2Number" = '220' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/220/sequence?model=7640130

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