Return-Path: Received: from mtiwmhc24.worldnet.att.net ([204.127.131.49]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Sat, 8 Jul 2000 20:23:28 -0400 Received: from lap ([12.74.128.168]) by mtiwmhc24.worldnet.att.net (InterMail vM.4.01.02.39 201-229-119-122) with SMTP id <20000709002943.VHLI2023.mtiwmhc24.worldnet.att.net@lap> for ; Sun, 9 Jul 2000 00:29:43 +0000 From: "John Wright, D.O." To: "LML" Subject: John Spry's fuel leaks Date: Sat, 8 Jul 2000 18:32:44 -0600 Message-ID: Importance: Normal X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> John, I just had to fix the same problem. I just had the plane (iv-p) painted. One of the reasons for painting was paint bubbling due to fuel leaking through eight pinholes in the upper skin. We sanded down to primer/carbon and as Charlie Kohler suggested applied positive pressure to the tank through the vent line after selecting "off" on the fuel selector switch. The skin was coated with soapy water and bubbles were observed. Then you have to put a thin layer of epoxy on the surfaces where the pinholes were found. Then a negative pressure is applied to the tank to draw the epoxy into the pinholes and allowed to cure. Repeat to verify no bubbling. I'll post again if the leaks recur. Maybe you can figure out where your leaks are by looking also for the green residue that av. gas leaves behind. Unfortunately, I suspect you will have to do some sanding, but since the problem isn't going to get well on its own.......John Wright Col Springs >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>