I am having an issue with this model. It has to be a functional technical model (meaning all of the doors and flaps must be able to move). I have done that but now that I need to animate moving the entire object, I am struggling because it seems that no matter what I do my other animations break. I have tried parenting everything to the main body of the aircraft, that breaks my stuff that doesn't have the mirror modifier. If I parent everything to an empty, it breaks a lot of my animations on other empties. If anyone is able to help here is the link to my .blend file
UPDATE: OK sorry for the late reply. After doing what you said, I realized what was happening. I was overwriting the parented objects. So by following what was suggested here, I was able to fix my issue.