therefore it was just a question of time. The only surprise being that it was a 777 and not an airbus which are very prone to water/fuel issues, so much so that it is a mandatory ETOPS check to drain fuel once a week.
Since science hasn't yet achieved burning water as a usable aviation fuel I feel sure that AT LEAST a weekly water drain check will become mandatory. We are pushing the boundaries of long flight times, short turnaround times to the point never envisaged.