"The flier assured the passengers via a statement that read", We would like to assure our passengers that 96 percent to 98 percent of our flights are operating as usual".
The other four, two of whom were also Airbus A320 Neo jets, were allowed to resume operations on Monday after repairs.
The DGCA said it has not got a "firm commitment" from the USA engine manufacturer Pratt and Whitney on addressing fresh safety concerns, which forced it to ground the fleet.
"The aircraft was to operate flight 6e 559 to Srinagar from Jammu but was grounded due to fuel leak from engine 1 after which the plane was grounded", New Delhi based Economic Times reported.
In a statement, IndiGo said, "An A320 (non neo) aircraft VT INZ operating Cochin-Mumbai and another A320 (non neo) aircraft VT IFU operating Mumbai-Goa, had technical snags detected during departure".
A number of A320neo aircraft powered by P&W engines were earlier grounded due to safety concerns, and another aircraft has now been added to this number. However, during engine start the Pilot-in-Command observed a hydraulic (not oil) leakage from no 2 engine. "Both these aircraft were immediately withdrawn for rectification". The setback also comes at a time when IndiGo plans to seek permission from the government to fly long-haul global flights.
The IndiGo flight (6E 132) which was grounded at Delhi's Indira Gandhi International Airport operated in the Bangalore-Delhi sector before a problem in the engine was detected by the pilot.
According to IndiGo's website, more than 900 flights were cancelled between March 16 and 31. On the whole, 138 flights stand cancelled.
Mumbai: Budget carrier IndiGo grounded one more A320neo in its fleet after as many as five aircraft in its fleet faced glitches over the past 24 hours, compounding the problems of the airline already hit by cancellation of flights.
The problem with the PW1100G engines was first red-flagged by the European Aviation Safety Agency (EASA) last month, following which certain restrictions were imposed on flying such aircraft.
Both Indigo and GoAir continued to fly the planes with these engines as it is believed that A320Neo planes, which come with two engines, can be operated even if one engine fails.