Hubballi - Tirupati - Hubballi Passenger has RSA with Tirupati - Kakinada Port - Tirupati Passenger. So electric loco which will come by Kakinada Port - Tirupati Passenger might continue it's duty for Tirupati - Hubballi Passenger. At present same thing is happening with diesel locos. LC from diesel to diesel might or might not happen at Guntakal Junction