As part of the new “Airbus 321 Neo” small passenger Aircraft certification process with new engine optional engines types that take place during the ninth February 2016 at Hamburg of its first flight, its recent certification process is the new optional CFM International’s LEAP-1A engines… In which the standard engines for the Airbus 321 Neo is Pratt and Whitney – PW1100G-JM engines in which as been certified among with the aircraft…… As with the new engine installation it’s still required for the engines to be test with the Aircraft to simulate the required environmental conditions to check its compatibilities in regarding how it’ll perform in real world situations in with the comprehensive series of safety and performances testing in a joint collaboration with the European Aviation Safety Agency (EASA) and the Federal Aviation Administration (FAA). It was Extreme conditions climatic tested in Florida on May 2016, at -65 degrees Fahrenheit – -54 Degrees Celsius, then it was tested for Velocity for Minimum Control on ground at Toulouse of that same month as well joining it sister in July the A320Neo with the same engine type in getting certified with more than four hundred hours of flight time..