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Is this normal?

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planegene

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Just pulled my engine, engine mount and firewall. Please can someone tell me if this is normal with the Pitts. Look at the attached pictures and notice the longeron has not been sealed or oiled! All 4 were left open at the firewall end.
The plane was built in 1980, like I asked is this ok or normal?

image-1807261596.jpg
 
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