CenTex Aerospace received FAA STC approval for its Halo 250 conversion for King Air 200s today. The conversion raises the mtow for 200-series King Airs from 12,500 to 13,420 pounds and moves the turboprop twin into the commuter category. Included in the Halo 250 conversion are new safety systems that provide improved stall warning in icing conditions, aural over-speed warning, elevator out-of-trim warning, engine fire extinguisher capability, emergency cabin lighting and illuminated escape path floor markings.