I found a few postmortems related to failover between power sources:

I found a few postmortems related to failover between power sources: it’s one thing to have UPS, generators and utility power, but you do have to switch cleanly between them.

2012, amazon:

2011: colo4

2005: serverbeach
http://forums.serverbeach.com/showthread.php?5123-Post-Mortem-of-Virginia-Power-outage

2013: superbowl (not quite the same, I think)
http://www.reuters.com/article/2013/02/08/entergy-superbowl-idUSL1N0B83N620130208

Hm, http://en.wikipedia.org/wiki/Northeast_blackout_of_2003 could be in this list too, couldn’t it?

Possibly - it’s a good one anyway!