No fatalities

ROBINSON HELICOPTER CO R66 accident at Delta, MO, 5 Oct 2021

Delta, MO, United States

On October 5, 2021, a ROBINSON HELICOPTER CO R66 operated by THOMPSON FLYING SERVICE LLC was involved in an aviation accident near Delta, MO. No fatalities were reported. Investigators recorded the probable cause as: 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. This summary draws on records from NTSB; 16 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-08-03Data APIEditorial standards

Probable cause

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 Determination

Contributing factors

PilotEffect on equipmentDamaged/degraded