** Travel Food Services TAVE.NS stock falls 2% to 1,279.9 rupees
** Airport quick service restaurants operator says CBI has alleged irregularities with 2012-2013 concessionaire contracts for food services in Chennai and Kolkata airports
** Adds, subsidiaries, Travel Food Services Kolkata and Travel Food Services Chennai, which merged into the co in September, named in first information report
** Case was disclosed in pre-IPO prospectus, co says
** TAVE up about 13.5% since July 14 debut
(Reporting by Ananta Agarwal in Bengaluru)
((Ananta.Agarwal@thomsonreuters.com))