Asia, especially India, is a key market for planemakers, with analysts expecting Indian passenger numbers to more than triple over the next 20 years as millions more people become wealthy enough to fly for the first time.SpiceJet, which was briefly forced to ground its fleet in late 2014 when it ran out of cash, is the fourth-largest Indian airline behind InterGlobe Aviation's IndiGo, Jet Airways and state-run Air India. It operates a fleet of 35 Boeing 737s and 20 Bombardier Q400s, agreed in January to acquire 100 new MAX 737 aircraft as part of its expansion plans in the world's fastest growing aviation market.The budget carrier plans to grow its operational fleet to 200 airplanes by the end of the decade and expand regionally with the new 737 MAX family of airplanes. SpiceJet will take delivery of its first 737 MAX in 2018. (Reporting by Aditi Shah, Tim Hepher; Editing by Amrutha Gayathri and Mark Potter)