Amateur-built STORM N516VB accident near Eustis, Florida

Probable cause

The pilot's failure to maintain directional control during an aborted takeoff. Contributing to the accident were the loss of engine power due to a malfunctioning alternator, which precipitated the off-field landing, and the pilot’s decision to attempt to take off from an area with high grass, which precipitated the loss of directional control.

NTSB analysis

The commercial pilot reported that he was conducting a local flight in the weight-shift-control aircraft when the engine lost total power. He added that he landed the aircraft in a field and determined that the main battery was "completely dead," so he obtained another battery and installed it on the aircraft. He test ran the engine before takeoff, and it performed satisfactorily. During the subsequent takeoff in high grass, the aircraft did not accelerate as expected, and the engine began to lose power. The pilot aborted the takeoff and applied the wheel brakes. The brakes locked, and he lost directional control. The aircraft then impacted a fence and a house before coming to rest on its left side.

The pilot reported that the alternator on the automotive engine, which had an electronic ignition, was likely not charging and that this resulted in the battery becoming depleted and the subsequent loss of engine power. He also reported that he did not account for the effect of the high grass on the airplane's performance and should have aborted the takeoff sooner.

Text from the NTSB. Open the NTSB docket for ERA16LA305 for the full record.