Brief Description: Completed firewall to bottom skin riveting
Having riveted the two large "ribs", I scuffed the aft portion of the firewall bend radius, presuming that fuel sealant is going to go there . I used #60 grit and I'm not sure I got it scuffed enough so will revisit that. Then I riveted the bottom skin/rib section to the lower firewall.
I think there's a flaw in the instructions which have you machine countersinking the nutplate attach holes in the bottom skin and dimpling the accompanying flange of the firewall. If you machine countersink the skin, you shouldn't need to dimple the firewall since you're not accommodating anything.
In other news, my hangar landlord says he wants to sell it.
