20250818013389A

Accident · Substantial damage

FAA accident report · Helio H-391B · Monroe, MI · August 18, 2025

Date
August 18, 2025 · 12:34 local
Place
Monroe, MI
Airport
Custer
Phase of flight
Landing: Touchdown
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N4431U
NTSB investigation
NTSBCEN25LA325
Reported as
Helio H-391B
People aboard
2
Fatal injuries
0
Other injuries
0
Pilot’s certificate
Private pilot
Pilot’s flight hours
12 in this make and model12 in the last 90 days

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

Pilot lost control attempting to land with a crosswind. The aircraft turned 90 degrees right into the wind and skidded on the left main wheel. Upon exiting the runway and coming into contact with the grass, the left main landing gear snapped off and the aircraft came to rest 180 degrees on the fuselage and left wing, resulting in crinkling of the wing and propeller contact with the ground. The propeller contact curled the blades and broke the gear reduction unit and the propeller and hub separated from the engine.

As the FAA filed it

PILOT LOST CONTROL ATTEMPTING TO LAND WITH A CROSSWIND. THE AIRCRAFT TURNED 90 DEGREES RIGHT INTO THE WIND AND SKIDDED ON THE LEFT MAIN WHEEL. UPON EXITING THE RUNWAY AND COMING INTO CONTACT WITH THE GRASS, THE LEFT MAIN LANDING GEAR SNAPPED OFF AND THE AIRCRAFT CAME TO REST 180 DEGREES ON THE FUSELAGE AND LEFT WING, RESULTING IN CRINKLING OF THE WING AND PROPELLER CONTACT WITH THE GROUND. THE PROPELLER CONTACT CURLED THE BLADES AND BROKE THE GEAR REDUCTION UNIT AND THE PROPELLER AND HUB SEPARATED FROM THE ENGINE.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

Other reports on N4431U · 2

Matched to the same aircraft by N-number and date.