Rupetime, I don't see any suggestion of this thread being an Excel-bashing exercise and in the absence of same, can only suggest that your apparent paranoia is misplaced. At the least, this may have flagged other 737NG operators' attention to this unexplained incident and I would have thought that any reasoned discussion ought to be conducive to flight safety, therefore of potential benefit to all. On that basis, can we park the commercial implications please?