In the mid-1970s, in
seeking to upgrade from their Convair 340/440s, Aspen acquired a fleet
Convair 580s. These were not reworks of their existing Convairs,
but 580s recently converted by
General Dynamics from some old ex-United Convair
340s. Aspen's own 340s actually continued
airline in conjunction with the new 580s for several years before being
sold off. These ex-
United 580s were later
augmented with some ex Allegheny 580s resulting in a total employment
some 16 of these
Allison turbo-propped airliners at one time or another.
Seen above is N5814
wearing the original Aspen
livery, landing at San Diego on an overcast day in May 1977 in this
by Frank C. Duarte, Jr.