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Atlas / NTSB / WPR21LA293

NTSB CAROL · Event

Event WPR21LA293

2021-07-28 Mountain Home, Idaho, United States Airport · U76 None 1 aircraft Status: Completed

Registry · N46MU

FAA Aircraft Registry record.

Make / Model

ENSTROM F-28A

TCDS

H1CE · ENSTROM HELICOPTER CORP THE

Engine

LYCOMING I0-360-B1E (180 hp)

Seats / Engines

3 seats · 1 engine

Last airworthiness date

19740913

ADS-B equipped

Yes — Mode-S A59868

Registrant of record

MEDIC CHOPPERS LLC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's improper fuel planning and improper in-flight decision-making, which resulted in a total loss of engine power due to fuel exhaustion and a subsequent hard landing on uneven terrain.

Factual narrative

The pilot reported that, while the helicopter was in the hanger, he put 4 gallons of fuel into the left fuel tank. He then intended to hover taxi to the fuel island for fuel. He observed people and an aircraft near the fuel island, and he hover taxied to a dirt area. While about 12-15 ft above ground level, the engine had a complete loss of power. He further reported that he was too low to autorotate, landed hard on uneven terrain and collapsed the left skid. An inspection revealed that both fuel tanks were empty. The helicopter sustained substantial damage to the fuselage and main rotor blades. 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).

  • Aircraft-Fluids/misc hardware-Fluids-Fuel-Fluid level
  • Personnel issues-Task performance-Planning/preparation-Fuel planning-Pilot
  • Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot
  • Personnel issues-Action/decision-Info processing/decision-Decision making/judgment-Pilot
  • Environmental issues-Physical environment-Terrain-Sloped/uneven terrain-Contributed to outcome

Verbatim from NTSB's published report. Source file NTSB_2021_WPR21LA293.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.