On 29 May 2016, Enders conceded in an interview published in Bild am Sonntag that some of the "massive problems" of the A400M were of Airbus' own making: "We underestimated the engine problems...Airbus had let itself be persuaded by some well-known European leaders into using an engine made by an inexperienced consortium." Furthermore, it had assumed full responsibility for the engine. On 27 July 2016, Airbus confirmed that it took a $1 billion charge over delivery issues and export prospects. Enders stated: "Industrial efficiency and the step-wise introduction of the A400M's military functionalities are still lagging behind schedule and remain challenging."