Originally Posted by RV-14E
Please see this VAF post
for examples of cracks on a flying RV-14 (not RV-14A).
Here are the parts contained in SB 18-09-17. Rounded forward, blunt aft and beveled edges are apparent on F-14148A Skin Doubler. Remember to countersink F-14148A/C to accept the dimpled J-stiffeners.
I will be installing these during my annual in two weeks and will report back with my experience. My airframe has 87.6 hours, is flown by a pilot who prefers boring flights and shows no indication of cracks in the area associated with the SB.
My friend and I completed the SB on my flying airframe last week. It took about an hour. You can read about the details here: http://rv-14a.blogspot.com/2018/11/m...ttom-skin.html
The AD3 rivets called out for in the SB were too short. Every AD3 rivet I used was 0.5 larger. When you place the rivet in the hole, this need will be immediately obvious to you if it applies (my use of primer may have contributed to this need), but I suggest bringing your rivet sizer with you when you crawl back in the tail.
I used drilled out rivet heads as filler for the exterior dimples.
Access wasn't tough. I used boards in the baggage area and lots of padding in tail.
Install was straightforward