Before start checklist doesn't work in Step by Step guide / Checklists Posted Tuesday at 08:46 AM Please tell us first, which version you are using / talking about e.g. P3D v4.5 or P3D v5 as well as the update. Your installation should be on the actual experimental Airbus version. If you look into this section of the forum you will find a lot of threads dealing with the same subject and all could be solved. If you have GSX installed I allways sugest (after the Cockpit Preparation CL has been finished) just to use the GSX function "Prepare for Pushback". This function automatically removes the jetway, closes all doors etc. and automatically the "Before Start CL" should start......(running in parallel with the GSX pushback).