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Occurred on 07/29/02 10 miles prior to arriving in Washington DC.

Heat kink on CSX tracks believed to be cause of derailment.  173 passengers & crew.

Capitol Consist:

154 P42DC 
74 P42DC 
1750 Baggage
39029 Trans/Dorm
32046 Sleeper
32096 Sleeper
38023 Diner
33045 Lounge
31537 Coach/Smoking
34018 Coach
34053 Coach
1521 MHC
1556 MHC
1714 Baggage/Mail
1453 MHC

1401 and 70005, behind the 1556, had been switched out at Toledo. 

Source: Amtrak, via Geen Poon, via Trainorders.com.