DHC-6-300 Twin Otter
There is an issue with the cockpit gauge shaders, that make the steam gauges unreadable. See screenshot, the Air Speed Indicator has been edited per below. The file path is /.fgfs/Aircraft/org.flightgear.fgaddon.trunk/Aircraft/dhc6/Models/Flightdeck/Instruments/asi/asi0.xml. All the steam gauges with the glass_shader.png will need edited.
<!-- <animation> <type>shader</type> <shader>chrome</shader> <texture>Aircraft/Generic/Effects/glass_shader.png</texture> <object-name>vitre</object-name> </animation> -->