My suggestion is , after cancellation of this train, the rake can use for a tvc - vijayawada weekly. The kerala super fast takes about 23 hrs between these two stations. so if we take the alappuzha route , it is need only 22 hrs from tvc to bza. Thus a train from tvc on wednesday around 3pm reach tirupathy in the next day morning and at bza arond 1pm. On return , an around 4pm starting train in the same day will reach at tvc around 2pm in the next day ie on friday. i think there is enough time for maintenance for saturday morning mumbai exp... your suggestions pls