A victims’ association reported the ruling, which was confirmed by a French judicial official, who spoke only on condition of anonymity because he wasn’t authorized to talk about the case.
Sophia Seco, director of the victims’ group, said they would appeal the investigating magistrates’ decision, calling it “inexplicable.”
“We are very angry,” she told the AP. “How dares French justice settle the case of Air France’s deadliest air crash in this way?”
Air France Flight 447 left Rio for Paris but crashed into the Atlantic Ocean on June 1, 2009, killing all 228 people aboard.
The Accident Investigation Bureau, the BEA, found that external speed sensors were frozen and produced irregular readings on the aircraft, which went into an aerodynamic stall. The captain also wasn’t in the cockpit.
The decision goes against the request of French prosecutors, who wanted Air France to stand trial for manslaughter. The French prosecutors meanwhile had asked to drop the case against Airbus for lack of sufficient evidence.
The crash and its fallout rattled the French government, a key shareholder in France’s flagship carrier. Victims’ groups also raised questions about Air France’s relationship with France-based Airbus, in which the French government also has a shareholding.
The case has led to new air safety rules regarding speed sensors known as pitot tubes.
An Associated Press investigation in 2009 found that Airbus knew since at least 2002 about problems with the type of speed sensor that malfunctioned on Flight 447, but air safety authorities did not order their replacement until after the crash.
Airbus insists that the plane was airworthy, and air accident investigators found a plethora of problems to have caused the crash. Critics say the planemaker and airline didn’t take the pitot tubes problems seriously enough.
Angela Charlton contributed to the report.