The work will be done by Sri Lankan Engineering, the aircraft maintenance arm of Sri Lanka's national airline, at it main hangar complex at the Bandaranaike International Airport north of Colombo, a company statement said.
IndiGo is India's largest domestic low-fare carrier, and is now that country's third largest airline in terms of passengers carried.
D A G Jayasuriya, Head of Engineering at Sri Lankan, said the airline has done several heavy maintenance checks for airlines such as Airblue and Emirates over the last several years.
"We have demonstrated time and again that we provide the highest level of expertise and a rapid time of completion at very competitive rates," he said.
"Our objective now is to secure continuous business from major airlines and smaller airlines that are expanding rapidly.
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Manoj Gunawardena, Sri Lankan's chief executive, said Sri Lankan Engineering is now ready to carry out work for all airlines in the region.
"It is our intention to develop ou