"Motor" sound in Cold and Dark start up

There have been several users who have reported that when starting a PMDG aircraft in P3D using the Cold and Dark start up that a sounds can be heard even with no ground equipment present.   A user identified the possible sound of the source as the "fuel_pump.wav" file in the C:\Program Files (x86)\Lockheed Martin\Prepar3D v3\Sound folder.  If you encounter this issue please try disabling this file and see if the problem is corrected for you.