Hello First of all it seems to be a great peace of work you have done, congraulations for that. I have the issue, that when I switch from the cabin to outside and back, all lights in de pannels goes on. Just a using the Instrument Light test. Then I have to switch to the overhead panel and turn back a airflow switch?? The same issue can be happen, using a F-key, for example to use the Reverse.. Best regards