DENVER - Paramedics were called to a plane at Denver International Airport on Sunday night after passengers complained about feeling ill after sitting on the jet for three hours without air conditioning.
Lufthansa flight 447 from Denver to Frankfurt was scheduled to depart at 5:40 p.m.
However, the plane's air conditioning system had a mechanical problem, according to airport spokeswoman Laura Coale.
Passengers sat on the plane while crews tried to fix the problem.
Coale said paramedics were called after passengers complained of heat exhaustion.
While all of the passengers refused medical treatment, the passengers were allowed to deplane. They reboarded at 9:20 p.m. and departed at 10:24 p.m.