photo by caribb American is also going to base some of the new 737s out of its Chicago hub. Previously, it had kept almost all of its 737-800s flying out of its Dallas and Miami hubs, and kept the MD-80s at Chicago. But when the MD-80 faced serious mechanical issues last year, the airline was forced to scrub hundreds of flights at O'Hare. The introduction of 737s there should lower their reliance on a single aircraft type for the bulk of their domestic flying.














