Bear, thanks for the explanation of the EEC logic for a three spool engine.
The EEC settles on Fuel flow by sensing the RPM of the N3 ONLY. This seems counterintuitive, but may circuitously explain why the engine, at the threshold of Burst, was given additional Fuel.
Is this common on all three spool engines or unique to the Trent 900? It seems rather odd to me but I don't profess to understand the EEC logic on a 3 spool design.