Where is it at? I might be able to assist depending on the details. At the very least I can look for anything obvious and send you lots of pictures.
I don't have any personal knowledge of Grumman mechanics in Nebraska, but if you're an AYA member, go on the AYA web site Ask the Experts section and post your question there. You could also ask on the Grumman Gang (http://www.grumman.net).
Where is it at? I might be able to assist depending on the details. At the very least I can look for anything obvious and send you lots of pictures.