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Atlas / NTSB / SEA05CA173

NTSB CAROL · Event

Event SEA05CA173

2005-08-16 Donnelly, Idaho, United States None 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

The pilot's failure to maintain clearance of a tree during a landing attempt due to loss of visibility from a self induced brown-out condition. Contributing factors were the pilot's failure to identify a hazardous landing site, and the tree.

Factual narrative

On August 16, 2005, at approximately 1715 mountain daylight time, a Hughes 369E, N500FU, was substantially damaged when the main rotor blade impacted a tree during a landing attempt near Donnelly, Idaho. The commercial pilot and his three passengers were not injured. Heliflite LLC, Boise, Idaho, was operating the flight under Title 14 CFR Part 91. Visual meteorological conditions prevailed for the personal cross-country flight which had originated 1 hour 15 minutes before the event. A flight plan had not been filed. The pilot said that he had landed at the site several times before, but that much construction work had been done since his last visit. He said that as he descended to his landing zone, the main rotor downwash from his helicopter created "brown-out" visibility conditions. He floated past his landing spot and the helicopter's main rotor struck a tree. The pilot said that pieces of the main blades subsequently damaged the vertical and horizontal stabilizer, and the tail rotor was damaged. The pilot said that he had landed at the site several times before, but that much construction work had been done since his last visit. He said that as he descended to his landing zone, the main rotor downwash from his helicopter created "brown-out" visibility conditions. He floated past his landing spot and the helicopter's main rotor struck a tree. The pilot said that pieces of the main blades subsequently damaged the vertical and horizontal stabilizer, and the tail rotor was damaged. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_2005_SEA05CA173.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.