In a move that will help reduce its debt by $100 million, cash-strapped SpiceJet on Monday announced that Carlyle Aviation Partners will acquire a 7.5% stake in the airline by converting outstanding dues as well as snap up shareholding in the cargo business. As it faces multiple headwinds, the no-frills carrier will also tap the Qualified Institutional Buyer (QIB) route to raise up to Rs 2,500 crore.