With its structural issues fixed the Electra was free to gain its place in the Eastern fleet, although this was never at the forefront as Rickenbacker had believed it would be. Quickly over taken by Boeing 727s and Douglas DC-9s the Electra nevertheless found its niche replacing the older piston prop-liners and operating the high density shuttle routes.
The Electra's final service for Eastern took place on October 30, 1977 marking over 17 years of service with the airline, quite an achievement considering the type's inauspicious start. Time had finally caught up with the Electras which, although capable of beating a DC-9 for time on the route due to propjets efficiency at low altitudes, was becoming very expensive to maintain. The propellers especially were nearly four times as expensive as they had once been. Even at the end of the 1970s the Electra was still sought after in the second-hand market and of the 14 survivors in the Eastern fleet all but one found second homes.
Cearley Jr, G.W. Eastern Air Lines: An Illustrated History
Russell, D.L. Eastern Air Lines: A History, 1926-1991
Serling, R.J. From the Captain to the Colonel: An Informal History of Eastern Air Lines