Originally Posted by
tommyleo
Jim, can you explain this one? Why would US have an apparently "extra" aircraft in CUN?
I'm not sure it was an extra plane just sitting in CUN waiting to be needed. The earlier of the two flights may have been delayed, either in CUN or somewhere prior to the CUN segment, is one possibility. Another possibility is that one of the planes may have had a mechanical the day before that took overnight to fix, although that would normally mean an extra flight on the day mentioned.
Jim