EASA CofA to Permit?
Just wondering if it is possible to switch an aircraft from EASA CofA to Permit to Fly? I appreciate there are restrictions on Permit aircraft (Day VFR etc.) but if they don't matter than can it be done?
If not lets say I had a CofA machine and wanted to modify it with an unapproved modification and wanted the work to be done by a non-certified engineer. Would this make a difference? Or do I now have an un-flyable heap?