Massey University's flight training school at Auckland and Palmerston North says security agencies have tried to check the background of Middle Eastern student pilots.
School of Aviation head Professor Graham Hunt said the school had trained pilots from 23 different countries over the past decade, including students from Middle Eastern countries.
But Professor Hunt said efforts to do "background checks" had run up against privacy laws.
"Privacy legislation prevents the school from handing out personal details of students."
He said would-be terrorists were unlikely to bother to train at Massey, because they would not want to wade through a masters degree in aviation just to get flight training that could be bought at a commercial flying school.