G HYD leak in the wheel well. Loss of fluid leads to PTU Fault (can't pressurize without fluid.) Y HYD system senses overheat, but is recovered. Thus, Dual HYD Failure is now only G HYD Failure. Land ASAP is no longer valid and time is taken to assure a safe landing with ability to stop the aircraft.
FWIW - for everyone saying they should have gone to Edwards AFB, most military bases don't show up in JB Nav Databases. If the crew wasn't already intimately familiar with the area, it may have never occurred to them. Trust me, as we cross the country it's infuriating to look down at 15,000 feet of beautiful emergency asphalt (or lake beds) and not see it displayed on our nav displays. Of course, it's on the charts, but in the heat of the moment I can see the logic of staying over a viable airport and not venturing across the unfriendly terrain with the possibility of additional failures.