GasPath
Then I see a problem. See Machaca's provided pictures of the Heat exchanger specifically the dozens of narrow tubes in the large cylindrical case. Any transfer of energy requires time, hence the narrow (large surface area) multiple passages. Adding time to passage transit requires restriction. I submit it is a logical place to consider a constriction. Though there are two systems, I refer to an earlier post of mine showing that when independent systems rely on common Fuel (Though stored separately), the possibility is enhanced for failure when certain parameters are shared, and possess an insurmountable extreme, (Temp. Viscosity, restriction, contamination, ambient energy, etc.). This possibility is well within consideration given the seven second delay.
#1159 Machaca, See also Arcniz#1160 for a good interpretation of my
point about heterogeneity in standard and duplicative systems.
Airfoil