France charged the Yemen air carrier in 2013 with manslaughter over the crash of an Airbus A310 which the French authorities said should never have been allowed to fly.
All but one of the 142 passengers, who included dozens of French nationals and 11 crew members, died in the June 2009 disaster in the Indian Ocean as the plane tried to land in the Comoros capital Moroni.
The teenager was rescued after being spotted swimming in choppy waters in the middle of bodies and plane debris.
Many of the passengers were Comorans heading home from France for summer break, which often include family and wedding celebrations on the islands.
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They had been flying from Paris and Marseille to the Comoros via the Yemeni capital Sanaa, where they were transferred from the plane that had carried them from France to the A310.
The 19-year-old jet had been banned from European airspace.
France opened an investigation in July 2009 to determine the cause of the accident.
The families of the victims then filed a suit in April 2011 accusing the airline of trying to block the truth and putting the lives of people in danger.
They had complained of delays in the investigation and accused Yemen of applying pressure to prevent its carrier from being held responsible.
Some 800 people who were close to the victims had demanded more than 70 million euros in damages.
Victims' associations, however, countered that entire families were "decimated".
A Comoros report into the crash concluded that "inappropriate actions of the crew" at the flight controls caused the plane to stall and led to the crash.