Bernoulli
Daniel Bernoulli, whose work with Hydraulics may have a hint to help the discussion. His most widely known discovery was that a fluid (inviscid Fluid, not "compressible") that was accelerated in a tube, created a concomitant reduction in pressure within. The Fuel line in 038 was subject to sudden demand. Cavitation at the HP (both) has been described and bears further thought. As an "incompressible" mass, the Fuel in the Line would transmit the focal cavitative results on the High side of the Pumps back through the system. In essence, the massive pressure at the Pump Lobes would communicate back through the Fuel and have an instantaneous effect on other mobile mecnanical devices in Line. Air "cavities" would have developed and perhaps failed backflow valves, Spar valves, and LP (boost) pumps back through the system. The Fuel in the Line is a "Hammer" that takes the shape of the System, but retains its abilities to hamper normal supply throughout the entire Fuel System.
Airfoil
(Suggesting there may have been no "obstruction", other than the Fuel itself, having created an insufficient flow due to inertial reluctance which may have failed other intersections)