Over hauling kit for passenger emergency alarm signal device with resetting key to RDSO SK No. 97017 alt- 2 consisting of following three items: ( a ) Item- 3, Grooved ring- 1/ Kit ( b ) Item- 13, ' O ' ring- 1/ Kit ( c ) Item- 14, ' O ' ring- 1/ Kit to RDSO Specn No. 02- ABR- 02 with amendment 4 of Sept- 2016, Appendix- J