X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from EXHUB003-4.exch003intermedia.net ([207.5.74.111] verified) by logan.com (CommuniGate Pro SMTP 5.3.11) with ESMTPS id 4663368 for flyrotary@lancaironline.net; Tue, 04 Jan 2011 09:03:12 -0500 Received-SPF: none receiver=logan.com; client-ip=207.5.74.111; envelope-from=jwhaley@datacast.com Received: from EXVMBX003-5.exch003intermedia.net ([207.5.74.45]) by EXHUB003-4.exch003intermedia.net ([207.5.74.111]) with mapi; Tue, 4 Jan 2011 06:02:35 -0800 From: Jeff Whaley To: 'Rotary motors in aircraft' Date: Tue, 4 Jan 2011 06:03:26 -0800 Subject: Broken Tension Bolt Thread-Topic: Broken Tension Bolt Thread-Index: AcusGCh8AM9/OSnFTl+KkNAih/D7qQ== Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_C03ABB0A7362B84BB53D544B3C305E0E0179F22AB585EXVMBX0035e_" MIME-Version: 1.0 --_000_C03ABB0A7362B84BB53D544B3C305E0E0179F22AB585EXVMBX0035e_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Yesterday, while checking over my engine for the source of a nagging oil le= ak I found a broken tension bolt, I guess it's good in respect to finding t= he problem but WTF? During installation I applied a spiral of silicone around each bolt trying = to prevent this from happening. The broken bolt is positioned in the upper= left hand corner (if viewed from prop end) and according to my Haynes Manu= al it is either #8 or #12 in the torque-sequence. Checking Tracy's website I read about his SQUAWK with same issue many years= ago ... he was able to get the bolt's threaded portion out without having = to tear-down the engine or resort to the drill and easy-out method. What happens to those metal shavings inside there if I have to drill and us= e an easy-out? Can I extract them all with a magnet or compressed air? Am I looking at an engine tear-down ... or replace the bolt (or bolts), re-= torque the stack and carry on? Jeff __________ Information from ESET NOD32 Antivirus, version of virus signatur= e database 5758 (20110104) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com This message, and the documents attached hereto, is intended only for the a= ddressee and may contain privileged or confidential information. Any unauth= orized disclosure is strictly prohibited. If you have received this message= in error, please notify us immediately so that we may correct our internal= records. Please then delete the original message. Thank you. --_000_C03ABB0A7362B84BB53D544B3C305E0E0179F22AB585EXVMBX0035e_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Yesterday, while checking over my engine for the sou= rce of a nagging oil leak I found a broken tension bolt, I guess it’s= good in respect to finding the problem but WTF?

During installation I applied a spiral of silicone a= round each bolt trying to prevent this from happening. The broken bol= t is positioned in the upper left hand corner (if viewed from prop end) and= according to my Haynes Manual it is either #8 or #12 in the torque-sequence.

Checking Tracy’s website I read about his SQUA= WK with same issue many years ago … he was able to get the bolt’= ;s threaded portion out without having to tear-down the engine or resort to= the drill and easy-out method.

What happens to those metal shavings inside there if= I have to drill and use an easy-out?

Can I extract them all with a magnet or compressed a= ir?

Am I looking at an engine tear-down … or repla= ce the bolt (or bolts), re-torque the stack and carry on?

Jeff

__________ Information from ESET NOD32 Antivirus, version of virus signatur= e database 5758 (20110104) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

This message, and the docum= ents attached hereto, is intended only for the addressee and may contain pr= ivileged or confidential information. Any unauthorized disclosure is strict= ly prohibited. If you have received this message in error, please notify us immediately so that we may correct our = internal records. Please then delete the original message. Thank you.
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