First officer found sleeping at controls of a Transavia 737 , says Dutch airline . Returning from a bathroom break , the pilot could n't immediately enter the cockpit . The first officer was asleep in his seat and did not wake up until he saw smoke coming out of the left side of the plane. The incident took place in September en route from Greece , Dutch officials say .
First officer found sleeping at controls of a Transavia 737 , says Dutch airline . Returning from a bathroom break , the pilot could n't immediately enter the cockpit . He eventually gained access , and the plane landed safely in Amsterdam . The incident took place in September en route from Greece , Dutch officials say .