"All the engines affected have been inspected and this is a unique incident," Airbus spokesman Florian Taitsch told Reuters.

Taitsch said the European Aviation Safety Agency ordered the inspections and follow-up checks after unexplained cracks were discovered in the combustion chamber of an A400M engine owned by Malaysia.

No problems had been found in any of the other affected engines, which belong to the first 31 delivered A400M aircraft, Taitsch said.

(Reporting by Andrea Shalal; Editing by Michael Nienaber)