With the thought that climbing an old-fashioned ramp to board a jet plane is like using a ladder to mount a race horse, American Airlines last week introduced the first true jet-age boarding system. At a cost of more than $100,000, it put into operation at San Francisco's International Airport a system of "jetwalks."
The system consists of two soundproof and weatherproof corridors, red-carpeted and glass-enclosed, which extend from the terminal at plane-door level on a high, fixed base. First-class passengers enter a short jetwalk that leads to the plane's front door via a short gondola that slides to the door...
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