X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-junco.atl.sa.earthlink.net ([209.86.89.63] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTP id 7184427 for lml@lancaironline.net; Tue, 30 Sep 2014 21:57:59 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.63; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=ODsgtiozd/+ykfXXYz+Uf5XjCvap1Gmg+eieyOIClIJZoInAVsJrudKEiW5ImtwJ; h=Received:From:Content-Type:Subject:Date:References:To:Message-Id:Mime-Version:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [71.181.66.26] (helo=[192.168.1.24]) by elasmtp-junco.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1XZ9AS-0000yH-1b for lml@lancaironline.net; Tue, 30 Sep 2014 21:57:24 -0400 From: Colyn Case Content-Type: multipart/alternative; boundary=Apple-Mail-873-29746442 Subject: Fwd: [LML] Continental starter adapter failure- Legacy Date: Tue, 30 Sep 2014 21:57:23 -0400 References: <9d28c0e40e2f4dcc92b85e65999ae7f1@BLUPR04MB722.namprd04.prod.outlook.com> To: "lml@lancaironline.net List" Message-Id: <440303D9-AE40-4A33-91A9-9B61F0BC7072@earthlink.net> Mime-Version: 1.0 (Apple Message framework v1085) X-Mailer: Apple Mail (2.1085) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da9405a864c769c97add2f760bb6db1990c94350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 71.181.66.26 --Apple-Mail-873-29746442 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Posting for Neal George... =20 From: Neal George=20 Sent: Tuesday, September 30, 2014 7:56 AM To: 'Lancair Mailing List' Subject: [LML] Continental starter adapter failure- Legacy =20 Gentlemen =96 It is nearly impossible to replace a Permold starter adapter correctly = in most aircraft without dismounting the engine. Yes, it=92s a pain, = but it=92s the only way to do it right. =20 Starter adapter studs are an interference fit in a thru-hole in the = crankcase. The interference fit damages the threads of the stud and the = hole. In addition to the interference fit, studs are installed with = Loctite 271 =96 it makes the installation =93permanent=94 and = contributes to sealing the hole against oil leakage. =20 Instructions for removing a stud installed with Loctite 271 include = raising the temperature of the assembly to about 400-degrees F to soften = the adhesive. Nine times out of ten, removing a stud without heat will = also remove aluminum from the threads =96 if the stud doesn=92t break at = the first exposed thread.=20 =20 Nominal-size steel bolts =96 for example, AN5-40A =96 will not achieve = proper thread engagement in a new stud hole, much less a deformed one. = Without proper thread engagement, correct fastener torque cannot be = applied and maintained.=20 =20 The overhaul manual (M16) lists a number of approved repairs for damaged = threaded holes. The starter adapter stud locations are not addressed. =20 Neal =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= The problem for us is that the adapter is fixed to the block with studs. = But we do not have enough room to withdraw the adapter backwards and = clear all of the studs =96 I think was two that wouldn=92t clear. I = can=92t recall which, but once you look at it, you=92ll see which ones = they are. So =96 I removed the offending studs with a stud extractor =96 = took a bit of doing as I assume the studs are installed with super = Loktite or similar, but they came out OK. Withdrew the adapter, and my = Lame fitted a new shaft and spring which luckily for me was provided by = TCM under a warranty claim. Meanwhile =96 removed the other studs, and = then reinstalled the adapter with a set of properly spec=92d bolts = (length etc critical of course) instead of the two above offending = studs. =20 If the adapter ever fails again =96 it will now be a very simple job to = remove the starter adapter. =20 =20 I guess I should caution that I don=92t know if what I did is endorsed = by TCM =96 it may be, but I don=92t know; I did check with my LAME and = he considered it fine, but your call of course here! =20 Good luck! Regards, John John N G Smith --Apple-Mail-873-29746442 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 Posting for Neal George...

From: Neal George 
Sent: Tuesday, September 30, 2014 = 7:56 AM
To: 'Lancair Mailing = List'
Subject: [LML] Continental starter = adapter failure- Legacy
 
It = is nearly impossible to replace a Permold starter adapter correctly in = most aircraft without dismounting the engine.  Yes, it=92s a pain, = but it=92s the only way to do it right.
 The interference fit = damages the threads of the stud and the hole.  In addition to the = interference fit, studs are installed with Loctite 271 =96 it makes the = installation =93permanent=94 and contributes to sealing the hole against = oil leakage.
 Nine times out of = ten, removing a stud without heat will also remove aluminum from the = threads =96 if the stud doesn=92t break at the first exposed = thread. 
 Without proper = thread engagement, correct fastener torque cannot be applied and = maintained. 
The = overhaul manual (M16) lists a number of approved repairs for damaged = threaded holes.  The starter adapter = stud locations are not addressed.
The problem for = us is that the adapter is fixed to the block with studs. But we do not = have enough room to withdraw the adapter backwards and clear all of the = studs =96 I think was two that wouldn=92t clear. I can=92t recall which, = but once you look at it, you=92ll see which ones they are.  So =96 = I removed the offending studs with a stud extractor =96 took a bit of = doing as I assume the studs are installed with super Loktite or similar, = but they came out OK. Withdrew the adapter, and my Lame fitted a new = shaft and spring which luckily for me was provided by TCM under a = warranty claim. Meanwhile =96 removed the other studs, and then = reinstalled the adapter with a set of properly spec=92d bolts (length = etc critical of course) instead of the two above offending = studs.
If the adapter ever fails again =96 it will now be a very = simple job to remove the starter adapter. =  
I guess I should caution that I don=92t know if what I did is = endorsed by TCM =96 it may be, but I don=92t know; I did check with my = LAME and he considered it fine, but your call of course = here!
Good luck!
Regards,John
John N = G = Smith


= --Apple-Mail-873-29746442--