Already Secondary Maintenance is happening in VSKP side right from the start.. The only difference between PM and SM is the Preventive Maintenance Schedules of coaches like IOH,POH. Rest all activities like checking of air brake system, vaccum brake system at pitlines, checking of passenger amenities & fittings, cleaning are done at both ends.. Now since all Coaches of AP have been earmarked to ECoR, the responsibility of maintaining schedules for preventive maintenance must have been transferred to Ecor too.. Nevertheless, there will be a Change in Number of this service soon.