----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- Subj: Re: [COUPERS] New AD Date: 11/19/01 To: [EMAIL PROTECTED]
Jan,
Here is what was posted in Coupe Capers, and Ed put on the list:
Regards,
Harry Francis
Subj: [COUPERS] Proposed AD -- comment period ends November 26
Date: 11/14/01 10:07:08 PM Eastern Standard Time
From: [EMAIL PROTECTED] (Ed Burkhead)
Reply-to: [EMAIL PROTECTED]
To: [EMAIL PROTECTED] (coupe-list (E-mail))
----[Please read http://ercoupers.com/disclaimer.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.
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.
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. 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. Average inspection techniques
may not be adequate for timely detection of this condition.
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. 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.
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]
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]
Roger Caldwell
Aerospace Certification Engineer
FAA, Denver Aircraft Certification Office, ANM-100D
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