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Atlas / NTSB / WPR25LA010

NTSB CAROL · Event

Event WPR25LA010

2024-10-09 Vale, Oregon, United States None 1 aircraft Status: Completed

Registry · N646H

FAA Aircraft Registry record.

Make / Model

ENSTROM HELICOPTER CORP 280C

Year of manufacture

1977 · 47 years old at event

TCDS

H1CE · ENSTROM HELICOPTER CORP THE

Engine

LYCOMING HI0-360 SER (205 hp)

Seats / Engines

3 seats · 1 engine

Last airworthiness date

19970210

ADS-B equipped

Yes — Mode-S A87C34

Registrant of record

STYER DAVID B

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot’s failure to maintain engine and rotor rpm during takeoff, that resulted in a hard landing.

Factual narrative

The pilot of the helicopter reported that, after completing an aerial application, he returned to the mix vehicle for an additional load. While reloading the helicopter, he noticed the wind direction was changing and “blowing harder” and may have shifted to a quartering tailwind. During takeoff from the mix vehicle, the engine and main rotor blade rpm started to decay. He aborted the takeoff and made a run on landing to an open field near the mix vehicle. During the landing the main rotor blades tilted aft and severed the tailboom. The helicopter sustained substantial damage to the tailboom. The pilot reported that there were no preaccident mechanical failures or malfunctions 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).

  • Aircraft-Aircraft propeller/rotor-Main rotor system-Main rotor blade system-Capability exceeded
  • Aircraft-Aircraft propeller/rotor-Main rotor system-(general)-Incorrect use/operation
  • Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot
  • Aircraft-Aircraft power plant-Engine (reciprocating)-(general)-Incorrect use/operation

Verbatim from NTSB's published report. Source file NTSB_2024_WPR25LA010.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.