To All The IST test method has yet to be finalized for inclusion into the tm-650. There is an incomplete draft that is being finalized, but has not been approved for insertion into the tm-650. As soon as final adjustments are made, the method will be recirculated for comments prior to it's inclusion in the manual. There is a committee headed by Foster Gray which has proposed a round robin to correlate IST test results with thermal stress testing for the identification of inner layer separations. There is a strawman out for comment now and the group will be meeting in DC. Please contact Foster or myself for a copy of the strawman if you are interested. Susan Mansilla Chairman TM-650 Manual Committee Robisan Laboratory