Piper J3
Well Known Member
I removed both wings today and found four (4) rivet heads missing on both L&R F-1270 Side Skin Doublers. The doublers were installed in 2017 at 316TT with no damage to the side skins. Hours now = 1040TT. I operate predominately off of a private grass strip, so maybe added stress / vibration from rough field?
The same rivet position failed on both sides, so something common is going on here. The common CS4-4 that failed is at the bottom of the rear vertical row of CR3213-4-2 cherry rivets. I have looked at integrity of all the rivets on the Side Skin Doubler, and even though paint is not well adhered, the rivets all look good and remain locked tight...
The same rivet position failed on both sides, so something common is going on here. The common CS4-4 that failed is at the bottom of the rear vertical row of CR3213-4-2 cherry rivets. I have looked at integrity of all the rivets on the Side Skin Doubler, and even though paint is not well adhered, the rivets all look good and remain locked tight...
