Court documents say the estate of Adam "DJ AM" Goldstein is suing several defendants for wrongful death.
Goldstein sustained serious injuries in a plane crash in September 2008 in South Carolina and later died of an accidental overdose of prescription drugs and cocaine in August in New York.
Before his death, Goldstein filed a negligence and breach of contract lawsuit.
The amended complaint filed Friday in Los Angeles Superior Court names several defendants, including Clay Lacy Aviation and Learjet Inc.
The 26-year-old Goldstein was known for his disc jockey skills and his relationships with actress-singer Mandy Moore and reality TV star Nicole Richie.
Attorneys for Clay Lacy Aviation did not respond to a request for comment. A message left with a lawyer for Learjet was not immediately returned.