Deccan Aviation specializes in field maintenance and repair of various models of Bell helicopters such as Bell 206B-3, 206L3, 206L4, 407, 212 and Eurocopter AS355.

Deccan Aviation also specializes in carrying out overhaul (in-depth maintenance or shop maintenance or repair) of major components of Bell 206 and Bell 407 helicopters such as the main gear box, tail gear box, freewheel unit, main rotor system, and tail rotor system.

Additionally, Deccan Aviation specializes in carrying out module replacement and hot section inspection of Rolls Royce Model 250 engines and Pratt & Whitney PT-6 engines.