There can be an issue with the cockpit gauge shaders, that make the steam gauges unreadable. See screenshot. The Air Speed Indicator has been edited per below. <pre>The <!-- and --> was used to comment out the shade.</pre> The file path is <code>/.fgfs/Aircraft/org.flightgear.fgaddon.trunk/Aircraft/dhc6/Models/Flightdeck/Instruments/asi/asi0.xml</code> All the steam gauges with the glass_shader.png will need edited.