It comes after one of its planes suddenly lost altitude last week, with a number of passengers injured.
Related stories
Three men executed on same day in US for the first time in 15 years
Gaza City police chief killed as Israel pushes on with deadly strikes
CPS director apologises for failings in case of rapist-murderer Simon Levy
Unemployed young people to join AI boot camps to get job-ready
Conditions on US aircraft carrier at sea for more than 250 days raise alarms
US government extensively spied on anti-ICE protesters and leftwing groups, records reveal