By April 2011, a total of 1,400 flight hours over 450 flights had been achieved. In May 2011, the TP400-D6 engine received certification from the EASA. In May 2011, the A400M fleet had totaled 1,600 hours over 500 flights; by September 2011, the total increased to 2,100 hours and 684 flights. Due to a gearbox problem, an A400M was shown on static display instead of a flight demonstration at the 2011 Paris Air Show. By October 2011, the total flight hours had reached 2,380 over 784 flights.