rectification of air ducts & servicing/repairs of guillotine gates, hot & cold air dampers & shut off gates, manual operated guillotine gates, repair/replacement of s.s. wire-mesh at the bottom of furnace (inside the bottom ash hopper); repairs to refractory, replacement of damaged insulation in boiler and fg duct of 210 mw u-1 to 4 boilers (for any 2 units). (oh-5).
