X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 09 Feb 2011 14:23:20 -0500 Message-ID: X-Original-Return-Path: Received: from ndmsnpf01.ndc.nasa.gov ([198.117.0.121] verified) by logan.com (CommuniGate Pro SMTP 5.4c2a) with ESMTP id 4843829 for lml@lancaironline.net; Wed, 09 Feb 2011 12:12:38 -0500 Received-SPF: none receiver=logan.com; client-ip=198.117.0.121; envelope-from=michael.s.reinath@nasa.gov Received: from ndjsppt03.ndc.nasa.gov (ndjsppt03.ndc.nasa.gov [198.117.1.102]) by ndmsnpf01.ndc.nasa.gov (Postfix) with ESMTP id 44355260827 for ; Wed, 9 Feb 2011 11:12:04 -0600 (CST) Received: from ndjshub04.ndc.nasa.gov (ndjshub04-pub.ndc.nasa.gov [198.117.1.34]) by ndjsppt03.ndc.nasa.gov (8.14.3/8.14.3) with ESMTP id p19HC4RH020037 for ; Wed, 9 Feb 2011 11:12:04 -0600 Received: from NDJSSCC06.ndc.nasa.gov ([198.117.4.176]) by ndjshub04.ndc.nasa.gov ([10.202.202.163]) with mapi; Wed, 9 Feb 2011 11:12:03 -0600 From: "Reinath, Michael S. (ARC-AM)" X-Original-To: Lancair Mailing List X-Original-Date: Wed, 9 Feb 2011 11:12:03 -0600 Subject: Re: MT Propeller Inspection Thread-Topic: MT Propeller Inspection Thread-Index: AcvIfHhM5NFvK4JJwUiN56ddroDwQQ== X-Original-Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-Entourage/13.6.0.100712 acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.2.15,1.0.148,0.0.0000 definitions=2011-02-09_06:2011-02-09,2011-02-09,1970-01-01 signatures=0 >> I bought my MT constant speed (hydraulic) prop several years ago... Rob, You should check if you have the O-ring seal modification in the hub. I bought my prop in 1999, I think. After about 400 hours, it started throwing a lot of grease from the blade O-ring seals at the hub. When the prop shop disassembled it, I could see and feel a groove that had warn into the soft aluminum hub where the O-ring seats. MT's fix was to machine and press in a stainless steel sleeve. The fix did not add any cost to the 6-year overhaul= , which was about $3K in 2005. I'm not sure when the stainless steel insert became standard equipment. The 6-year MT overhaul includes sanding the blades down and inspecting the wood for cracks under the composite covering. After that the blades are refinished and come back looking like new. If you have damage to the stainless leading-edge inserts, they are also replaced, but that adds cost. Mine did not have to be replaced in 2005. Of course, they also inspect the hub, bearings, re-grease, and replace the o-rings. Mike Reinath LNC2 N3602M at 1050 Hrs TT San Jose, CA