On the photo's the APU inlet is open, so it apparently was running.
Is it common to have the APU running when landing the 777?
XPMorten:
As stated in a previous post, if both engines lost power there would have been no AC electrical power to the transfer busses, and the APU would have attempted to start automatically. That could be the reason for the APU inlet door being open.
Normally, the APU is not running for landing, unless it is required by a QRH or MEL procedure.