I'm playing at day 240 and I've got the problem that the aircraft armor is stuck at 33% and doesn't be repaired anymore. It's something I've had in prior build before, then I've restarted at prior savegame without this damages to get rid of this problem. As it is not a real error, no code or seomething os shown for that, but I can upload my safegame file for your check, if it may help. I've made screenshots and uploaded them into steam (https://steamcommunity.com/id/grc1996/screenshots/) for information.
Please let me know, if I can help you furthermore to underrstand and correct this issue. Thanks a lot for your support and have a nice day !