Aircraft Availability

From:         edzapata@digital.net (Edgar Zapata)
Organization: NASA KSC Vehicle Engineering
Date:         27 Apr 95 02:53:18 
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Availability as MTBF/(MTBF+MTTR) or operational availability as
MTBF/(MTBF+MDT) must be a statistic airlines use for their fleets or
for a particular aircraft.  Having exhausted any other avenues would
anyone know how an airline figures this number or what it might
typically be for say, American 727's or Northwest DC-10's?

The subject is of interest in the spacecraft industry now; in particular
the RLV project by NASA/Industry (my concern here...)

Thanks anyone.