All, the center section AD was a result of that Ercoupe that was given to an Airframe and powerplant class for practice. That Ercoupe was heavily corroded out of negligence I heard. And this was the reason to be donated to the class. However, the folks made alarm and we had an almost instant AD.
I think the Center Section AD was a good thing after all. We found one corroded rib in my aircraft in a location where it would have been undetected. That corrosion could have grown and could have affected the rear spar. The same can not be said for the service bulletin for ultrasounding the rivets. It is totally nonsense and does not put into account the reasons for that crash. Moreover I like to add that while ultrasounding rivets does not hurt, aside the costs, the ignorance of the driving forces of that bulletin leads away from the real causes of that accident. Instead of x-raying rivets, one should emphasize the danger of aerobatic maneuvers to the airframe. Second would be to remind everyone about the loading limits of an Ercoupe. We had a plane that was flown over gross in aerobatic maneuvers. That lead to the accident. Not corrosion in rivets. With that bulletin in place one might come to the conclusion that since his plane passed the rivet test, he can keep overloading and overstressing his plane. Someone stop me please. I am getting upset again. hartmut ----- Original Message ----- From: Ed Burkhead To: 'Dan Hall' ; [email protected] ; 'OLiver' Sent: Saturday, January 19, 2008 6:34 PM Subject: RE: [ercoupe-tech] Ercoupe defense/praise Dan, Would you please check the timeline? (I've got to be out till afternoon tomorrow.) My fuzzy memory agrees with Oliver that the center section inspection AD came before the aerobatics crash. I *think* I remember that the aerobatic crash did bring about the "mandatory" (only for commercial operations) service bulletin for ultrasound inspection of the center section rivets. Ed -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Dan Hall Sent: Saturday, January 19, 2008 10:02 AM To: [email protected]; OLiver Subject: Re: [ercoupe-tech] Ercoupe defense/praise Hi Oliver, There was an AD that required inspection plates be installed in the center section, OR removal of the wings, and inspection of the center section every three years. There was also a service bulletin (not mandatory) to have an ultrasonic testing done on the main spar rivets. Best regards, Dan ----- Original Message ----- From: "OLiver" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Saturday, January 19, 2008 7:58 AM Subject: [ercoupe-tech] Ercoupe defense/praise > Dan thanks for loading and using the big gun. Excelent response however > I do have one question??? I didn't get any notice of an A.D. after the > break up of the 'coupe in ca. I think that was a "MANDATORY" service > bullitan which does't apply to us for pleasure, just those used for > training. Again thanks for defending us. Oliver > > > > > Yahoo! Groups Links > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.516 / Virus Database: 269.19.7/1232 - Release Date: 1/18/2008 > 7:32 PM > > Yahoo! Groups Links
