RF is certainly a possibility and one that rarely leaves any tangible evidence for investigators to see. Most internal RF will be preventable due to electrical systems and wiring being shielded to prevent leakage affecting a neighbouring system, but external RF is a problem and can affect A/C in a perplexing manor of ways. I believe that it is rare for a fuel system to be compromised by RF as there are mechanical systems as back-up, and I believe there are 2 FCU’s on the aircraft, one for each engine. For both to be affected by RF would be unusual. I dare to speculate that it may just be a fuel flow problem due to contamination of the fuel, most of which was dumped onto the runway post landing! Time will tell.