Customer Bulletin 410-- Inspect Outfitter Flourescent Lighting Incorporated the following Gulfstream Aerospace Aircraft Service - Changes: ASC 43 Windshield Heat - Temp Sensor Test Switch - Install ' 48A Aux Power - APO Fs.ry Test - Improvement 413 APU Starter Drop-tut Light #49 Cockpit Display & Nose Compartment Fans - Replace 497