How to apply for revision petition in drt

Hey, you can refer to the Debts Recovery Tribunal Rules, 1993 for any questions regarding any procedure in DRT courts. 

According to the Debts Recovery Tribunal (Procedure) Rules, 1993, under section 5A:

(1) Any party considering itself aggrieved by an order made by the Tribunal on account of some mistake or error apparent on the face of the record desires to obtain a review of the order made against him, may apply for a review of the order to the Tribunal which had made the order.

(2) No application for review shall be made after the expiry of a period of sixty days from the date of the order and no such application shall be entertained unless it is accompanied by an affidavit verifying the application.

(3) Where it appears to the Tribunal that there is no sufficient ground for a review, it shall reject the application  [but where the Tribunal is of opinion that the application] for review should be granted, shall grant the same: PROVIDED that no such application shall be granted without previous notice to the opposite party to enable him to appear and to be heard in support of the order, a review of which is applied for.]

For reference, you can refer to the case of Standard Chartered Bank v. MSTC Limited, in the Supreme Court. Here the court talks about filing review appeal within the given time period, and implications of not doing so.