It was SriLankan Engineering's biggest contract to-date, the airline said in a statement.
"This is the third consecutive year in which IndiGo has awarded SriLankan Engineering the contract to carry out C-checks on its Airbus A320-200 fleet, and is a significant expansion from the C-checks on 13 aircraft in 2009 and another 13 in 2010."
C-checks are carried out on an aircraft every 18 months, and work on the IndiGo fleet is being carried out throughout the year.
SriLankan Engineering has gained a reputation as the regional specialist in maintenance of Airbus aircraft at its hub at Bandaranaike International Airport (BIA).
Apart from supporting the needs of the national carrier, SriLankan Airlines own all-Airbus fleet, SriLankan Engineering has carried out projects on aircraft of other regional carriers.
These include as Pakistans Airblue and Indias GoAir, as well as routine work on aircraft of several airlines that operate to BIA, north of the capital Colombo.
South Asia is one of the most rapidly growing regions in the global air transport industry, and SriLankan Engineering is ideally positioned to serve the needs of all types of airlines in the Subcontinent, Middle East, and Southeast Asia, said SriLankans Head of Engineering Priyantha Rose.
We are currently carrying out a long-term programme to enhance our facilities at BIA."
SriLankan Engineering has in recent years been positioning itself as a Maintenance-Repair-Overhaul (MRO) organisation in the region.
(LBO) ry
12-04 1554