Also, in reading through this thread, it appears that the Captain claims to have checked and found no open C/Bs. The open breakers were found some time after the landing. Its possible that with a landing such as this, a fault may have occurred and tripped something. That's not something the crew would be likely to notice at this point (what with landing the plane and kissing the ground, etc.)
But after reading the report - I can't find any other reason that ALTN GEAR EXT didn't work. Or have I missed something?