Hi
Generally when the review petition is filed in the supreme court and is under scrutiny, one copy of the Petition and Court Fee Stamp tendered shall be retained and the defects shall be communicated to the petitioner.
If the defects are not removed within 90 days from the date of communication of the defects. the matter shall be listed with Office Report on default before the Judge in Chambers for appropriate orders.
Generally a defect can be of any kind and the same is notified to party in person or advocate on record.
You can check the link ( http://www.sci.nic.in/IBAOR/notified_aor_list.html) to know
1) the section under which the defects have been notified
2) date of filing of petition,
3) Defects notification date and
4) Delay in rectification of defects
Also in almost 99.5% of cases a review petition in supreme court will always fail .
Also since yours is a service matter, you can be rest assured that the government will be definitely penalised for unnecessarily prolonging the issue by filing frivolous review petition
Hence no worries.