Replacement of Defective ECo,LTR,LTS, HTS, HTR, ITS hanger feed coil tubes, eroded water wall tubes, fin welding of water wall tubes, metal build up on eroded portions of water wall tubes and coil tubes, providing of carbon steel pads on water wall tubes, carrying out D -meter survey, erection and dismantling of temporary platforms at bottom ash hopper and where ever necessary, rectification of heavily deformed ITSH coil tubes and rectification of burner bottoms and tops of Unit-II boiler during Annual Overhaul period for the year 2017-18