Modified brush holder assembly without carbon brushes for TM TAO 659 to RDSO Drg. No. SKEL/ 4505 ALT- 2 & Mod Sh. No. ELRS/ MS/ WAM- 4/ 0216 of 12. 02. 99 & its Amdt. No. 1 to 5 or latest. Note:- 1 ) Spring drum should be of 10 holes to Drg. No. WR- BL- EL/ 4- TM- 109 2 ) The Material of split pin should be stainless steel.