Harda Incident has nothing to do with this Loco Issue.
I have cited the Instance of Harda Incident for showing the maintenance standard of Railways. However, from the accident pictures a layman can guess what will be the toll of casualty whatever may be the figure furnished by Railways.
So " No loco is given a go ahead to haul a train unless it satisfactorily clears all the tests" this statement is also not beyond doubt.(Loco Performance figure of E-Loco is a TESTIMONY of recurring failures of Tap Changer Locos)
FYI...
more... kindly take a look at News Entry# 236830 I think you will understand the maintenance standard of Railways.