Kathy, That type data may be hard to come by. As was mentioned earlier in this conversation, there may not be too many reliability studies on nonconforming conditions for that particular reason, they are nonconforming conditions. China Lake studies were no doubt performed to support criteria in MIL-STD-2000 or some other similar MIL standard. The best you might hope for are failure analysis reports from an associate, someone on TechNet, or the like. Hope you can find something, and good luck. Franklin ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################