LOS ANGELES (AP) — The mother of a man killed when a helicopter crashed during a reality television shoot is suing the aircraft's operators and producers behind the show.

Darren Rydstrom was one of three people killed when a Bell 206B Jetranger helicopter crashed during an early morning flight on Feb. 10 in northeast Los Angeles County. His mother's wrongful death suit was filed Wednesday in Los Angeles.

The men were filming a scene for an untitled military-themed show being produced for the Discovery Channel, which is not named in the lawsuit.

The case's defendants are Van Nuys Copters and Orbic Air, the companies responsible for the lease of the helicopters; the estate of pilot David Gibbs; and reality television producers J.D. Roth and Todd Nelson.

Phone messages left for the defendants were not immediately returned Thursday.