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firewall cracks

rturbett
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rturbett Community Regular

rturbett

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While reviewing  a log book for a 65 C, I saw two entries for firewall repair. one was stop-drilled, and one had a plate patch.


Is this common, or a huge red flag. I think there was 7500 hrs on the airframe


Rob

sellis Enthusiast

sellis

Posted
Posted

Rob,


It's ok to patch a firewall crack. The patch needs to be made out of the same material as the firewall. The material is 321 stainless steel .016 MIL-S-6721. The patch also needs to be sealed. The other crack that you mentioned that is only stop drilled needs to be sealed and patched.


 

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