overhauling of pressure parts, air pre-heaters of unit no-03 of 3x210 mw, atps, anpara, sonebhadra-2 h.p. jet cleaning of boiler pressure parts and de-slugging of tubes of water wall, scw, platen s / h, crh, hrh, final s / h, ltsh, economizer, baskets of aph. 3 general survey of boiler pressure parts 4 repairing of furnace ceiling of penthouse in first pass, second pass and roof of dog house, inspection and rectification of all hanger support, refractory work at different area of boiler and air tightness test ( att ) 5 rectification / replacement of damaged / eroded pressure parts tubes / bends / dmw / reducer. 6 build up of eroded portion of the tubes caused by ash / steam erosion using suitable welding electrodes matching with parent metal composition. depth of erosion up to 2.5 mm, length of erosion up to 250 mm 7 repairing and rectification of economizer coil with measurement and rectification of coil pitches ( one coil counted for top & bottom ) 8 fins welding of water wall, scw and saw cut fins. 9 providing additional ss half shield in s / h, screen & hanger tubes, w / w tubes, ltsh / economizer coil / bends and other area of pressure parts. 10 repairing / rectification of buck stay corner attachment in boiler 1st & 2nd pass 11 alignment of horizontal & vertical buck stay beam. 12 replacement of all types of seals with holding strips including seal tabs in both aph. 13 replacement of all static seals and rotor post seal with repairing of seal ring segments and spool piece in both aph. 14 repairing of eroded sector plates of both aph. 15 repairing of bracing pipe in fg side with proper shield in both aph. 16 removal and shifting of h.e. baskets of both aph to zero meter for jet cleaning with minor repairing. 17 removal and shifting of c.e. baskets of both aph to zero meter for jet cleaning. 18 repairing work by replacing plate not less than 300x1000 mmm in both aph. 19 leveling of all sector plates ce & he, adjustment of axial seal plates, rotor leveling, sealing of adjusters of sector plates and replacement of axial seal plate assembly of both aph. 20 inspection and servicing of support bearing assembly of both aph. 21 checking, inspection and servicing of guide bearing and servicing of lube oil system and all its components of both aph. 22 checking of drive unit including servicing of gear box, fluid coupling, air motor and servicing / repairing / replacement of soot blowers of both aph. 23 repairing of expansion bellows of pa / sa / fg duct. 24 repairing / rectification of and tightening of all hanger supports / tie rods of pa / sa / fg duct 25 replacement of expansion bellows of fg duct above aph. 26 optional work 27 replacement of he / ce sector plate 28 replacement of support bearing 29 replacement of guide bearing