However, Federation of Indian Airlines will continue to function and its other members are not pulling the plug yet, industry sources said.
The association was set up in 2006 as a lobby group. Other members include GoAir, IndiGo, Jet Airways and SpiceJet.
While Air India said it was leaving the body as it prefers dealing directly with the government, aviation sources pointed out to differences among the members.
"There has been no unanimity amongst the members on various issues, including allowing foreign direct investment in airlines," said an airline source familiar with the working of the group.
Members have also been delaying payments including those of legal fees to the FIA, the source added.
An another issue over which the members disgaree is the government's 5/20 rule which disallows domestic airlines with less than five years of operations and 20
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