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7. Carefully inspect the gear case mounting and split line bolts and replace or return to service depending on the following inspection criteria: 

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a. The bolt visually appears bent. 

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Check for a bent bolt by laying it on a flat surface and rolling the bolt. 

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b. The threads are damaged to the point that the bolt cannot be installed by hand. 

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c. The bolts have visible cracks or deformation in shank and threads or underhead radius. 

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Light surface rust is acceptable, but no corrosion pitting is acceptable in the shank, underhead radius, and threads. 

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d. The bolts are corroded to the extent that corrosion cannot be removed with a rag and solvent (such as brake cleaner or alcohol). 

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<b>Note:</b> All split line bolts that are less than grade 8 should be scrapped. 

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8. Thoroughly cleanse the gear case split line bolts that can be reused. 

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9. Clean hardened washers to remove all dirt and oil and return to service. 

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<b>Note:</b> Scrap any washers that are not visibly flat. 

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Ensure that the surface mounted to the U-tube is free of paint.
