On the marine gas turbine engine shown in the illustration, what temperature should be carefully monitored following a shutdown for an engine fire? Illustration GT-0017

Correct Answer: Option A — power turbine inlet

Following an engine fire, the power turbine inlet temperature must be monitored to ensure the fire is extinguished and to prevent thermal soak-back damage. High residual temperatures indicate that combustion may still be occurring or that heat is not dissipating, which could warp critical turbine components.