21.   Then, rising as a swarm, they would be sucked into jet engine air intakes, their bodies fracturing the whirling turbine blades.

22.   This provides better control over air intake for better performance, improved fuel economy and lower emissions.

23.   Through that low-lying air intake.

24.   Experts said possible causes of engine problems ranged from birds flying into the air intake to mechanical failure.

25.   More constant air intake contributes to the control of fuel flow at a constant level.

26.   Theories include an aerodynamic stall or a loss of power because of a flock of birds sucked into engine air intakes.