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Raphael Jacobelli sent the following response to me by accident. Here it is for the group. Ed Burkhead http://edburkhead.com/ [EMAIL PROTECTED] -----Original Message----- From: Jacobelli, Raphael P [mailto:[EMAIL PROTECTED] Sent: Thursday, February 20, 2003 9:08 AM To: 'Ed Burkhead' Subject: RE: [COUPERS-TECH] RE: [COUPERS-FLYIN] Corrosion These parts need to be treated with alodine 1200 (the Alum spars web - anyway) epoxy polyamide primer. Fay surface sealant should be used (I can't remember what we use in the aerospace industry) and rivet wet installed with this stuff as well. I read a story and then the NTSB report about a failed rear spar hinge fitting on an ercoupe flown in turb and slightly above gross - same intergranualr corrosion -----Original Message----- From: Ed Burkhead [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 18, 2003 7:39 AM To: Coupe-List; Coupe-Tech Subject: [COUPERS-TECH] RE: [COUPERS-FLYIN] Corrosion Lynn Nelson's picture of the wing rear attachment corrosion is posted on my website for you to view. This is chilling. http://edburkhead.com/Ercoupe/corrosion_wing_attach.htm Ed Burkhead http://edburkhead.com/ [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Monday, February 17, 2003 7:33 PM To: [email protected] Subject: [COUPERS-FLYIN] Corrosion Hi Coupers; While working on an Alon wing this weekend, I decided to remove a portion of the rear spar to better inspect the amount of corrosion I thought I was seeing. Guess what I found. (Besides all the white stuff!!) I found that only 3 of the 14 rivets that connect the rear spar hinge fitting to the rear spar were actually working/connected any more. Ten of the rivets had their heads corroded off, and one had the aluminum split so it was not doing much good. Needless to say, it is getting fixed. I am attaching a picture of the area, and you can see all the blank holes. (Oops! I can not send the picture through our Coupers site, because it returns the email for being too long, so I guess you will have to take my word for it) Lynn Nelsen ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
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