Can anyone think of any rail vehicles in which people have died as part of an accident where the vehicle has returned to service? There are obviously plenty of cases where other vehicles from the unit have re-entered service (e.g. 205018/205029 at Cowden), however I'm struggling to think of any recent examples where an actual vehicle has re-entered service. The Watford 321s were effectively completely new vehicles.
There were 2 C08 vehicles (6606 and 6734) which were rebuilt from the 2 vehicles from the 2005 London Bombing, although the only original bits were from the solebar down, everything above the solebar having been scrapped.