Subj: Re: [COUPERS] New AD =20 Date: 11/19/01 =20 To: [EMAIL PROTECTED] =20 =20
Jan, Here is what was posted in Coupe Capers, and Ed put on the list: Regards, Harry Francis Subj: =A0=A0=A0[COUPERS] Proposed AD -- comment period ends = November 26 =A0=A0=A0 Date: =A0=A0=A011/14/01 10:07:08 PM Eastern Standard Time =A0=A0=A0 From:=A0 =A0 [EMAIL PROTECTED] (Ed Burkhead) Reply-to:=A0 =A0 [EMAIL PROTECTED] To:=A0 =A0 [EMAIL PROTECTED] (coupe-list (E-mail)) =A0=A0=A0 =A0=A0=A0 ----[Please read http://ercoupers.com/disclai= m er.htm before following any advice in this forum.]----The Airworthiness (A/W) Concern Process Guide implemented by the FAA's small Airplane Directorate SAD) requires that we = submit to you an Airworthiness Concern Sheet (ACS), conveying potential airworthiness issues to aircraft owners and operators through associations and type clubs. =A0 Attached, herewith, is = an ACS and draft of Service Bulletin No. 31 pertaining to this concern. We request that they be distributed to your membership for technical and economic impact comments. The copy of ACS and SB No. 31 have also been provided to Aircraft owners and Pilots Association (AOPA), Experimental Aircraft Association (EAA), and Univair Aircraft Corporation. =A0 During a borescope usage demonstration at a FAR Part 147 school, the center section right aft spar P/N 415-13103R of an Ercoupe model 415E exhibited extreme exfoliation corrosion on the web area.=A0 There is concern that this = area is only accessible by use of a borescope and that any other spars with this condition would be subject to future structural failure leading to possible loss of a wing and loss of life.=A0 Average inspection = techniques may not be adequate for timely detection of this condition. =A0 This ACS is intended to = alert owners of Ercoupe 415C, 415CD, 415D, 415E, 415G, Forney F1 and F1A aircraft, Alon A-2 and A-2A, and Mooney M10 aircraft of the potential for severe corrosion to be present in the wing center section.=A0 Our initial Risk Assessment for this concern indicated that a Notice of Proposed Rulemaking (NPRM) might be considered. The FAA final determination will depend in part on the information received in response to this ACS. =A0 Please provide your membership comments to the FAA's Denver Aircraft Certification Office by November 26, 2001. Comments may be sent to Roger Caldwell via e-mail [EMAIL PROTECTED] =A0 If you have any questions relating to the above information, please contact Roger Caldwell at (303) 342-1086, fax: (303) 342-1088; or e-mail: [EMAIL PROTECTED] =A0 Roger Caldwell=A0=20 Aerospace Certification Engineer=A0=20 FAA, Denver Aircraft Certification Office, ANM-100D=20 =A0 =A0 =A0 --part1_b9.171e1ec9.292da3d8_boundary--
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