Airbus says three out of four plane engines failed in the crash of an A400M military plane last month near Seville, Spain that killed four people.
Airbus Defense and Space made the announcement in Paris Wednesday, saying Spanish accident investigators confirmed that the engines of the plane were faulty in the May 9 crash.
It said the investigators made the judgment after completing preliminary analysis of the airplane's digital flight data and cockpit voice recorders.
Airbus blames the failures on a software problem.
Two members of the crew survived the crash.
Airbus says the aircraft was under flight trials at the airport and was scheduled to be delivered to a Turkish buyer.