🔍 Key Concepts

• Lube oil scavenge temperature limits and what they protect in a gas turbine (bearings, seals, sump components) • The relationship between engine power, heat generation, and lube oil cooling in the scavenge system shown in Illustration GT-0017 • Standard engineering practice and safety margins when a temperature limit is exceeded and corrective action (reducing load) is ineffective

💭 Think About

• If the lube oil is already above the safe limit and reducing power does NOT bring it back within limits, what does that suggest about the condition of the cooling or lubrication system? • Which choices involve continuing operation with an out-of-limit temperature, and what kind of risk does that pose to bearings and other internal components? • Looking at the diagram, how critical is the lube oil path to all the bearings and sumps, and what could happen if oil continues to overheat there?

✅ Before You Answer

• Identify which options involve operating with the temperature still out of limits versus restoring it to within limits • Consider standard OEM/engineering guidance: when a parameter exceeds its maximum operating limit and does not respond to power reduction, what is the conservative, equipment-protection action? • Think about which action allows you to inspect and troubleshoot the lubrication and cooling system before serious damage occurs