Yes,--- Many years ago I had this exact pattern of crazing (splitting) in
the upper left corner of my IV-P door. I contacted Lancair and the window
manufacturer who both did not know how to advise me. My son Is a Program
Manager Engineer at Gulfstream in Savanna, and he talked to the experts
there and they invited me to bring the airplane up for them to look at. I
brought it up and at about 11 o'clock I taxied through the gates and into
the main hangar. As engineers were coming and going to lunch, many came by
to look at it. Their opinion was unanimous. There is one way to fix this
window Charlie. Change it!

As to the cause, it was unanimous too. A drying of plastic due to
chemicals/solvents. Thinking back, I had given the door to be painted in
Redmond and did not see the process of preparation and painting. But I
suspect a solvent/cleaner crossed over the window in this area.

I changed the window, and it has been eight years without a recurrence.
Needless to say I'm extremely careful about acetone/gasoline/any cleaners
with solvents.

Ross Connell at Lancair may recall a time many years ago when 409L needed a
replacement windshield. I watched the operation and it was done in two day's
(as best I can recall). It was not nearly as bad job as most people thought
it was going to be.



Charlie K.