Stepping up of Pay Anomaly

R/Sir/Madam Please advise me for stepping up of Pay Anomaly case Can I persue my case in law of court, if Yes what is the procedure ? Joined PSU : Myself: May 2001 & other person: June 2001(both as Jr. Engineer (S1) i.e. same cadre and Pay scale) Promotion due on 1st April 2011 as Asstt. Engineer (E1) Myself promoted as Asstt. Engineer (E1) on 1st April 2011 after quilified the written exam & Interview both, but the Other Person Disqualified in the merit and not promoted as Asstt. Engineer but Management promoted him as Jr. Engineer Spl grade (S3). In the same stage both persons got the same basic pay after the promotional increament because both joine same cadre, same pay scale and in same LOP. But in the next year i.e. 1st April 2012, the other person promoted as Asstt. Engineer (E1) Due to this situation the other person got more salary than me i.e. due to one more increament than me even that person is one year junior to me in this cadre. Brief Details: EMPLOYEE REQUESTING FOR STEPPING EMPLOYEE WITH WHOM STEPPING UP CLAIMED JOINED PSU As JE Grade-II on [deleted] As JEGrade-I on [deleted] DESIGNATION ENGINEER (ELECTRICAL) – E02A ENGINEER (ELECTRICAL) – E02A ANOMALY STATEDTO ARISE APRIL – 2012 APRIL – 2012 DATE OF INCREMENT 1ST JANUARY 1ST JANUARY SCALE OF PAY LOWER POST 16400-3%-40500 (E1 Grade) 16000-3%-40000 (S3 Grade) HIGHER POST 16400-3%-40500 (E1 Grade) 16400-3%-40500 (E1 Grade) BASIC PAY a) IN PREVIOUS SCALE ONDIFFERENT DATES (IF AVAILABLE) Year Basic Pay Grade Year Basic pay Grade Apr-2011 26900/- E1 Apr-2011 26900/- S3 Apr-2012 27710/- E1 Apr-2012 28550/- E1 Jan-2018 35150/- E02A Jan-2018 36210/- E02A ON THE DATE OF ANOMALY 27710/- 28550/- (As on April-2012) (As on April-2012)