RE: [COUPERS-TECH] Center Section Spar Attach fitting Rivets

[Mary Lechner]

----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- Hi Norman-read Wayne DelRossi's article in Coupe Capers Apr02 (hyd press for squeezing wing attach fitting rivets) ---[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- (GOOD STUFF)However, I feel that close tolerance bolts could be an adequate repair. The 4 place coupe uses close tol. bolts,(spar sections were tested to destruction) with riveted fittings deforming well before those with close tol. bolts.The squeezed rivet clamps 6 pieces together & as Wayne points out expands into unevenly drilled holes. Ted A/p Sac,Ca. ----- Original Message ----- From: Norman Carrigg To: tech@ercoupers.com Sent: 2/22/03 5:22:08 PM Subject: [COUPERS-TECH] Center Section Spar Attach fitting Rivets I am doing my first annual on N2601H this week, and thought I should take care of the Center Section AD at the same time. Luckily, most everything looks good in there, but I do have a bit of corrosion on the spar web behind, and above, the right side Spar Attach fitting.   The problem we have run into here is that to de-rivet the large rivets of the spar attach fitting in order to clean up the corrosion, we also have to re-install these large rivets, which would be difficult at best. It looks like this would probably require the removal of the main spar completely just to get the rivets done. On my plane, the same rivets were replaced on the left side with AN bolts and aircraft nuts.   So far, neither Univair nor Skyport believe that bolts are a legitimate repair. My mechanic generally believes that bolts would be as good as or better than the original rivets.   Does anyone have any knowledge of this problem, and what a good solution might be?   I would greatly appreciate any feedback you can provide.   Thanks,   NBC   --- Mary Lechner --- [EMAIL PROTECTED] --- EarthLink: The #1 provider of the Real Internet.   ============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/