I remember about 15 yrs ago a discussion on "30 yr calendar life
limits" on the ISR Brasov gliders. Primarily it was concerning the 2
seat IS28B2. I do believe there was eventually an extension approved
by the factor after detailed inspection and replacement of some parts.

I cannot find any online research discussing the calendar life
limitation for these gliders.

Does anyone have any knowledge or back ground on this?
Was the single seat IS29D2 affected by this?

Thanks
T