X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 24 May 2011 13:23:22 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-masked.atl.sa.earthlink.net ([209.86.89.68] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTP id 4991919 for lml@lancaironline.net; Mon, 23 May 2011 13:02:31 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.68; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=O5LWna7SveX17kPLSCGxq3PmJK2AvycaaOcGG24rLHpFSIR5s6ngFhfYNownLz7s; h=Received:Content-Type:Mime-Version:Subject:From:In-Reply-To:Date:Content-Transfer-Encoding:Message-Id:References:To:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [216.57.118.194] (helo=[192.168.1.131]) by elasmtp-masked.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1QOYVx-0006VD-WD for lml@lancaironline.net; Mon, 23 May 2011 13:01:58 -0400 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Apple Message framework v1082) Subject: Re: [LML] Re: Fuel restriction or air, Fuel Vent Check Valves From: Colyn Case In-Reply-To: X-Original-Date: Mon, 23 May 2011 13:01:57 -0400 Content-Transfer-Encoding: quoted-printable X-Original-Message-Id: References: X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.1082) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940b5c3dec2e0d3ea912b9034b8f320d461350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 216.57.118.194 has anyone found such fuel caps? On May 23, 2011, at 10:49 AM, Paul Miller wrote: > Having a check valve or float valve in the vent line is common in = certified aircraft so I disagree that vent lines must be free flowing in = both directions. The twin cessnas use a float system to block the vent = when fuel is present. This has led to problems with unanticipated = blockage of the vent line leading to ADs like this one: >=20 >> Compliance: Required as indicated, unless already accomplished. >> To provide an alternate source of fuel tank venting in case of fuel = tank vent obstruction by >> foreign material and/or sticking of the fuel vent valve, within the = next 100 hours time-in-service after >> the effective date of this AD, accomplish the following: >> (A) Install applicable vented fuel cap(s) with related adapters and = fuel servicing placards > The fix has been a "sniffle valve" on fuel tanks or a sniffle valve on = the fuel cap itself to prevent vacuum in flight. If the Lancair fuel = caps had a vacuum vent that would be the simplest solution for a backup = in addition to switching to the other tank. >=20 > Paul Miller > Legacy >=20 > -- > For archives and unsub = http://mail.lancaironline.net:81/lists/lml/List.html