Gear failure... lol
The gear was down and locked. However, there was a gear annunciator problem caused by one of the computers. However, the gear synoptic (or whatever they call it on the Airbus) was showing everything ok.
The crew thought they'd go through their checklists to be on the safe side and selected alternate gear extend. I'm told that this locks the nosewheel steering (huh? Don't ask me, ask Airbus). So the aircraft had to be towed off the runway .
The aircraft is relatively new, and computers are.. well... computers... so it's highly unlikely that this is a result of poor maintenance.
The aircraft did a few passes.... this also helped burn off fuel (less fire hazard).
Computer replaced... Problem fixed
Rgds.
NSEU