While inbound from Wilmington on 19.6.80, TriStar wake vortex caused this Caravelle to land heavily at the approach end of r/y 26. The left main gear collapsed and the aircarft came to rest almost a mile past the runway threshold. Originally delivered to United as N1010U in 10.61 and sold to Sterling as OY-SAM in 1.72, going back to the States with Midwest Air Charter in 5.78