Engine : Gas Turbines - 497/277
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| On an GE LM2500 gas turbine powered vessel you are conducting a borescope inspection of the compressor. What is used on each compressor stage as a reference for indexing the blades? |
| A) The IGV actuator. |
| B) The locking lug blades. |
| C) Witness marks center punched on the #1 nozzle and blade. |
| D) Scribe marks located on the stator and rotor diaphragm. |
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