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Atlas / NTSB / WPR21LA338

NTSB CAROL · Event

Event WPR21LA338

2021-09-08 Tillamook, Oregon, United States None 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

The pilot's failure to maintain clearance from a powerline during a low reconnaissance, with sun glare.

Factual narrative

The helicopter pilot reported that he was on a low reconnaissance over a field in a canyon intended for agricultural application. During a climb out that was on a heading facing the sun, he lost sight of a previously identified powerline, and attempted to avoid it by referencing the two supporting powerline poles. As the helicopter flew closer, he located the wires and believed that the helicopter’s trajectory would clear the obstacle; however, the helicopter struck the powerline, the pilot lost control, and the helicopter descended and impacted terrain. The helicopter sustained substantial damage to the fuselage and main rotor system. The pilot reported that there were no preaccident mechanical malfunctions or failures with the helicopter that would have precluded normal operation.  Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • Personnel issues-Psychological-Attention/monitoring-Monitoring environment-Pilot
  • Environmental issues-Physical environment-Object/animal/substance-Wire-Effect on equipment
  • Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Altitude-Not attained/maintained
  • Environmental issues-Conditions/weather/phenomena-Light condition-Glare-Effect on operation
  • Personnel issues-Action/decision-Info processing/decision-Decision making/judgment-Pilot

Verbatim from NTSB's published report. Source file NTSB_2021_WPR21LA338.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.