FS2004 SGA V2500 Engine Sounds. Sounds for the SGA McDonnell Douglas Series. These are the DC-9 sounds to be used with any aircraft with IAE V2500 engines. These are recorded from the real deal and represent precisely what you would hear in the cockpit of the DC-9 - a very quiet engine sound with a gentle wind noise (which for some odd reason isn't as dominant in a DC-9 cockpit as others, according to out testers with DC9 cockpit experience). The SGA DC-9 family is pre-configured to use the proper soundsets, so as long as you follow the installation instructions, your SGA DC-9s should be ready to use these already. By Erick Cantu.