19419/19420 MAS-ADI Biweekly Exp also gets VTA Diesel Loco (Alco Loco) from Ahmedabad to Chennai. Some members have reported that Vatva Diesel (WDMx/WDGx) is sometimes detached at GTL and the train gets AC Electric Loco (WAPx/WAGx/WAMx) from Guntakal to Chennai!