AOH MAINTENANCE SCHEDULE KIT ( SUB KIT AOH- 2B ) OF 25 UNCOMMON ITEMS SPECIFIC TO M/ s. BT TYPE ( NOW M/ s. REPL ) TAP CHANGER AS PER ANNEXURE- Q3 AND ANNEXURE- AOH- HW- 3 OF RDSO Technical Circular No. RDSO/ 2010/ EL/ TC/ 0102 Rev. 2 dt. 06. 08. 2021.