Nancy found a Thread under Airstream Restoration- the General Repair Forum- Those Damn European Hinges (PatLee 09-20-2019). This was BEFORE leaving for a rough and tumble rock hunting trip. Great timing.
I had swore to myself that I was going to avoid posting on the Airforums for a longer period of time, BUT this thread had a very interesting post.
Az-Stream, Post #4 had the most simple and inexpensive method to secure the hinges from disassembling while towing an Airstream. Probably ALL Travel Trailers... but lets keep it down to OUR Airstreams.
The permanent method is to go to Piano Hinges. They have been 100% effective holding the doors onto the cabinets as hinges. I know, I did it. The 2006 Safari and the 2014 International.
But... after reading az-streamer's post, with photo... it was so simple, so off the wall... I tried the idea and went on a Off the Grid Boondocking trip to New Mexico, Arizona and Nevada.
This inexpensive method... works. I used TWO straps on those hinges I could. Most with one zip tie was only possible. Some... NONE as it was flush on the ends and I will watch them for future application of zip ties, if needed.
The Zip Tied secured hinges may also prevent the wood screws from becoming loose as well. A real Win / Win for everyone.
I have been using Piano Hinges since owning the 2006 and 2014. The new 2019 27 footer was immediately retrofitted with ZIP TIES... and they seem to be very effective. This was our first trip with the new trailer.
Az-streamer... after YEARS on this Forum... this had been a common issue for myself and many others, no doubt. I hope this will solve the hinge issues for some of us who vibrate our cabinets, without Mercy.
Some on the Thread confuse loose 'other bolts and screws' and that is another thread. I have lots of hinges as examples of what come loose and the tiniest screws actually hold the hinges together.
I tightened the zip tie using a pair of pliers to snug it up, tugging on the loose end, just enough not to break the nylon, and left about a half inch cutting the excess. Snug them tight... I actually broke one, but my zip ties are years old and I will get fresh ones soon.
Several followup threads since then were also on track. GREAT SIMPLE CURE... we hope.