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Date:  1-9-2011
Number of Hours:  0.00
Manual Reference:  
Brief Description:  Replacement Lower Longeron

Way back when I was working in the fuselage skeleton I referenced drawing 59 which shows a keep-out area along the lower longeron fron F-604 forward about 4 3/4 inches. This is where the main gear weldment will be bolted to the longeron. What the plans didn't mention (and I didn't catch at the time) is that there is a second section where the forward tab of the weldment will also bolt to the longeron.

I realized my mistake when I was fitting the right lower longeron, but I had already drilled the left side. I opted to wait until I fitted the gear to see if there was a problem or it I would luck out. Unfortunately, I didn't luck out and there is a rivet hole way to close to one of the bolt holes.

I decided to just go ahead and replace the lower longeron and doubler. I will have to talk to Van's about the skin since I will have one hole with no place to go. For now, I flattened the dimple and will have to see what they say. It should be fine since the heavy structure under the skin will be solid.

I ordered the replacement parts from Vans on Thursday, they should be here this week.
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Hole in longeron to close to bolt hole

Hole in longeron to close to bolt hole

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matching holes in the skin, dimple flattened

matching holes in the skin, dimple flattened

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