Sent: Thursday, August 31, 2006 12:07 PM
To: Mike Williams; Richard J. Hawryluk; Robert J. Goldston; Hutch Neilson; Wayne T. Reiersen
Subject: Casting interference review
Attachments: casting_scan_eval_r1.pdf
As a follow up to our discussions on casting interference checks, I thought the slides Dave Williamson put together for this morning's conference call would be of interest. Based on today's discussions, it is concluded that the A and C castings should be OK, but the type B's have two areas in particular which need to be checked more carefully - these areas will be checked more carefully and machined or ground before they're shipped. These computer interference checks are pretty good for the most part (the dots in the figures indicate inspection points), but there are a few areas where there are only a few points (we are increasing the inspection density in these areas). The main issue is that they are really limilted in their ability to check for hardare interferences because they are not precisly represented in the models. The actual fit up will absolutely verify that the casting interference issues are resolved, and will also check if there are any interference issues with the coil clamps and miscellaneous hardware. I suggest we proceed with the field checks at least for a full field period's worth of windings, and then review the results and decide how to proceed beyond that based on the degree of comfort these results give us. Phil