Forget doing the 401k loan? if at all possible...to many strings among other issues. I would go into forbearance on the mortgage for the max 12 months. You will qualify seeing as this furlough is directly related to Covid. Look into the details but at the end of the forbearance you can take the unpaid year of payments and spread it over the term of your loan or just add it all to the end of the term.
No mortgage for a year plus, unemployment bennies, plus paid for delta pilot medical plan...should give most a little breathing room. Good luck folks.