We have developed three cracks through our rudder skin propagating at rivet heads. See attached pictures. In all three cases the crack is through the last rivet on the horizontal stiffener where it meets the vertical spar. The aircraft is a 1999 kit, first flew in 2009 and has 450 hours on it. Any advice on this matter would be much appreciated.
Thank you,
Taylor De Ley
Thank you,
Taylor De Ley