Question 24Gas Turbine - 1st Asst/Chief

70% to pass

You are conducting a borescope inspection of the combustor section of a GE LM2500 gas turbine engine. You observe a one square inch hole in the combustor dome where burn through has removed the metal. What would be your course of action?

ARecord the damage and continue to operate the engine while monitoring the high pressure turbine temperatures and nozzle condition.
BImmediately take the engine out of service.
COperate the engine only in an emergency and at reduced load.
DMake temporary repairs with on board repair kit to patch hole.
AI Explanation

The correct answer is A) Record the damage and continue to operate the engine while monitoring the high pressure turbine temperatures and nozzle condition. This is the correct answer because a hole in the combustor dome of a gas turbine engine is a significant structural issue that requires close monitoring, but may not necessarily require immediately taking the engine out of service. The operator should closely track the high pressure turbine temperatures and nozzle condition to ensure the engine is not operating outside of safe parameters. Continuing operation with close monitoring is the appropriate course of action, rather than immediately shutting down the engine (option B) or operating only in an emergency (option C). Making temporary repairs (option D) is generally not advised for a structural issue of this magnitude.

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