interesting. Ok. I know they haven’t always CPUd with old R/PZ2 or less, but seeing PZ4, I’ve never seen a sweep not occur, except way back in the very new post merger days, when out of sync PNRs basically froze the upgrade process.

No instrument applied, just a CPU. As as it turns out, not too long after posting, upgrade email came through. My time stamp is showing 8:03 here in PHX, which would make it roughly 22 hours 45 minutes prior to departure. Like I said, seen it off by several
minutes before, but never longer than 15.