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R22 main rotor overspeed

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What is required depends on what the max RRPM was, 110-116 or above that. It also depends on wether it was power on or power off. If it was power on then the engine may require an inspection as well. If it was during an auto. then the engine would be unaffected. I don't have a manual in front of me but there are required checks to the drive train and if it was in the higher rpm range the blades have to be pulled and the spindle bearings inspected. You need to get with a trained mechanic that has the maintenance manual and perform the inspections in the overspeed section of chapter 2.

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