By Tim Hepher PRAGUE (Reuters) – Europe's Airbus broke a major commercial barrier on Tuesday when its A320 family of planes overtook the Boeing 737 to become the most-delivered jetliner in history. Boeing's decades-old record fell as a jet was delivered overnight to Saudi carrier Flynas, bringing deliveries to 12,260 since the A320 began service in 1988, according to benchmark data from UK-based consultancy Cirium, used across the industry. Airbus did not immediately respond to a request for comment on the data, tracked by aircraft supply analyst Rob Morris. Between them Boeing and Airbus have delivered more than 25,000 such jets, originally designed to feed large hubs and later widely adopted by low-cost carriers, which Airbus courted after Boeing cut output during a downturn in demand po

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