Derailment

THE SOUTHBOUND LOCOMOTIVE 4006 WAS SET OUT THE MORNING OF 1/11/24 AT BROAD PASS FOR 3-4 INCH FLAT SPOTS AND LOCKED UP WHEELS. MECHANICAL INSPECTED THE AFTERNOON OF 1/11 AND FOUND NO CONDEMNABLE FLATSSPOTS. MECHANICAL CUT THE TRACTION MOTOR PINION OFF, ALLOWING THE WHEELS TO MOVE FREE. THE 4006 WASRELEASED AND TO BE PICKED UP IN ROUTE BY THE SB FREIGHT THE EVENING OF 1/12. AT 0730 1/13, THE SB FREIGHT EXPERIENCE A UDE AT MP 246.8 BETWEEN CAR 46 AND 47. UPON INSPECTIONS THE FOURTH AXLE OF THE 4006 WAS FOUND TO BE OFF THE RAIL.