Originally Posted by Lumatic
I don't want to hijack this thread but I guess, though discussed before, this is relevant. After being rescued from sitting in a NM field for 25 years, my 71 on the second day of it's maiden voyage had a wing window inexplicably disintegrate. The next day the other one did the same. No previous visible damage. No rocks, etc. Andy offered the only explanation which according to Ockham's Razor is the only explanation. This tempered glass though extremely strong in resisting major trauma over time is prone to shattering for little or no reason.
Many times, when an Airstream with tempered glass, is parked for a long time, especially when sand and dirt can blow on it, and then is moved to a different location, some of the windows, especially the wing windows blow.
There seems to be a pretty valid reason, but tough to document.
Tempered glass, is tempered on the surface only, as described by glass companies.
Tempered glass when it's surface has been etched by blowing dirt or sand, will shatter, in time, when exposed to a different degree of heat from the sun.
That has happened hundreds of times.
That etching, normally, is invisible to the naked eye.
Tempered glass however, is like "life" itself.
You never know "when."
That might explain the loss of your wing windows.