No fatalities

STEPHEN J HOFFMAN MS-500 accident at Houston, TX, 29 Oct 2022

Houston, TX, United States

On October 29, 2022, a STEPHEN J HOFFMAN MS-500 was involved in an aviation accident near Houston, TX. No fatalities were reported. Investigators recorded the probable cause as: The pilot’s failure to secure the magneto switch before attempting to hand rotate the engine which resulted in an inadvertent engine start, a runaway airplane, and subsequent impact with parked airplanes. This summary draws on records from NTSB; 1 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-08-03Data APIEditorial standards

Probable cause

The pilot’s failure to secure the magneto switch before attempting to hand rotate the engine which resulted in an inadvertent engine start, a runaway airplane, and subsequent impact with parked airplanes. Contributing to the accident was the failure to properly secure the airplane with chocks.

— NTSB Determination

Contributing factors

PilotIncorrect use/operation