Originally Posted by
a_fman
It's funny to read that
The Boeing MD-80, a quiet, fuel-efficient twinjet, was certified by the Federal Aviation Administration in August 1980 and entered airline service in October 1980. Its Pratt & Whitney JT8D-200 engines, combined with its efficient aerodynamic design, allow the MD-80 to meet all current noise regulations while producing operating costs among the lowest in commercial aviation.
while, at the same time, reading how desperate AA is to replace the MD80s with 737s to reduce fuel usage and operating costs. For example,
this thread.