I find it interesting that the FLI shows a needle for both engines, whereas the EC155 only has a single pointer and you look at the digital readings to see which engine is limiting and what parameter - values are underscored. At lower levels they are both torque limited, so both torque values will be underscored, but as you climb you transition to N1 limiting and you can find (typically) one engine's Tq value underscored and the other's N1 value underscored, until a bit higher when up both N1s will be limiting. In this example, a similar system may have helped as the pilot would have been confronted with a single FLI pointer (which would have been No 2 TOT limited) and he could then have looked at the individual engine parameters and seen matching Tq and N1 (or very close) and wildly differing TOT - 770 C vs 890 C. Possibly this would have led to an easier diagnosis of the engine with the fault