Acoustical piping resonance
Probably off topic and very unlikely, shrug.
Unusual acoustical standing waves in piping can restrict fuel flow. These are very difficult to recreate or analyze, as they leave little evidence. These standing waves generally depend on a combination of fluid flow, pump speed, pipe geometry, external vibration and fluid density.
Also, the investigation board mentioned cavitation damage to the fuel pumps.
In your collective opinion, how long would it take for cavitation to damage a 777 fuel pump? Could the damage could happen in the time preceding this accident or would it take longer?