CH-640 Fuselage Firewall sub-assembly (2 of 52)




Firewall center channel and doubler placed together the way I think it should go.  I don't understand why the channel has the holes on it's sides and the doubler does not.  What are these holes for?  I am sending pics with this question to Zenair.
Firewall center channel and doubler placed together the way I think it should go. I don't understand why the channel has the holes on it's sides and the doubler does not. What are these holes for? I am sending pics with this question to Zenair.