THE PURSUIT OF D.B.COOPER opens. Written by Jeffrey Allen Fiskin, with uncredited input from W.D.Richter and Ron Shelton. After creative differences prompt original directors John Frankenheimer and Buzz Kulik to bail, 70% of existing film is reshot by new director Roger Spottiswode. Robert Duvall and Treat Williams head the cast in little-seen, escapist crime caper positing a fictionalised addendum to the unsolved parachuting hijacker mystery,