New Delhi- Govt said that Private airline IndiGo has expressed interest in buying stake in the national debt-laden carrier, Air India.Civil aviation dept clarify that offers have also been made informally by other natonal and international airlines.Air India, often referred to as the Maharaja after its turbaned mascot said Govt. The cabinet took the first step in offloading the airline with an in-principle approval for the sale of a stake in Air India, which is bogged down by $8 billion or Rs. 52,000 crore in debt.