FRANKFURT, Germany (AP) — In the latest round of their decades-long battle for dominance in commercial aircraft, Europe’s Airbus established a clear sales lead over Boeing even before the American company encountered more fallout from manufacturing problems and ongoing safety concerns.

Airbus has outpaced Boeing for five straight years in plane orders and deliveries, and just reported a 28% quarterly increase in net profit. It was already winning market share by beating Boeing to develop a line of fuel-efficient, mid-sized aircraft that are cheaper for airlines to fly.

And now Boeing is facing a government-mandated production cap on its best-selling plane.

Yet the European company is unlikely to extend its advantage in the Airbus-Boeing duopoly much further despite having customers clamoring for more commercial aircraft, according to aviation analysts. The reason: Airbus already is making planes as fast as it can and has a backlog of more than 8,600 orders to fill.