A single-engine Van's RV-10 crashed around 2:15 p.m ... or about 1,100 of those plans are the specific model involved in the crash. "It's a kit-built airplane," NTSB investigator Elliott Simpson ...

Accident investigators are scrutinizing an unsecured cockpit door as a causal factor in the fatal crash of an Van’s RV-10 crash into a factory near Fullerton Municipal Airport (KFUL) in California.