About 10:09 a.m. on November 12, 1983, Amtrak train No. 21 (The Eagle), with 162 persons aboard, derailed near Woodlawn, Texas, while traveling at 72 mph on the Missouri Pacific Railroad. The train was traveling westbound on the single main track when it passes over a section of rail that a repair crew had just installed to replace a broken rail. The break had occurred at a field weld in a length of new continuous-welded, 136-lb RE section, chrome-vanadium alloy, high-strength, vacuum-treated rail, which had been installed in the track about 1 month earlier. The temporary repair consisted of removing a length of the outer rail in a curve and replacing it with a 19-foot 6-inch length of rail bolted in place. The repair insert was a section of used, 136-1b RE section, standard-carbon rail. The repair crew used an oxyacetylene torch to cut both the new alloy rail and the used standard-carbon rail during the repair. The accident resulted in 4 passenger fatalities and 72 injuries.