Return-Path: Sender: (Marvin Kaye) To: lml Date: Tue, 25 Feb 2003 18:26:02 -0500 Message-ID: X-Original-Return-Path: Received: from imo-r08.mx.aol.com ([152.163.225.104] verified) by logan.com (CommuniGate Pro SMTP 4.0.6) with ESMTP id 2037060 for lml@lancaironline.net; Tue, 25 Feb 2003 17:07:43 -0500 Received: from Sky2high@aol.com by imo-r08.mx.aol.com (mail_out_v34.21.) id q.24.3870305d (30950) for ; Tue, 25 Feb 2003 17:07:38 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: <24.3870305d.2b8d4329@aol.com> X-Original-Date: Tue, 25 Feb 2003 17:07:37 EST Subject: LNC2 500 hr Maintenance issue #3: Gear door fuselage hinge attachment X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_24.3870305d.2b8d4329_boundary" X-Mailer: 8.0 for Windows sub 810 --part1_24.3870305d.2b8d4329_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit 320/360 Gear doors I used the Lancair recommended "pop rivet" method to attach the gear door hinge half to the fuselage (thru the imbedded aluminum). The forward few rivets of the main gear doors started to get loose at about 300 hours and all those rivets were easily replaced with AN3 bolts thru the cockpit closeout rib. However, at this annual condition inspection, I noticed that the forward 4 or 5 nose gear door hinge/fuselage rivets were also working loose. Bolts are not applicable here because the cockpit side of the nose gear tunnel at the hinge line is under the floor and is further hidden by the tubes for brake and electrical lines. Today, I drilled out all of the original rivets. I also had to drill thru the harder pop rivet setting shaft. In doing so, the drill vibrated and enlarged the hole. I should have then cleaned up the holes and obtained oversize rivets for a proper fit and thats what you should do if you have this problem. But no, I have 1/8 inch stainless steel pop rivets (much hardier than aluminum) from another airplane project and so I installed those. I will report back at a future date on whether these harder rivets make up for the loose holes they were installed into. Lord knows how difficult those will be to drill out! Scott Krueger N92EX --part1_24.3870305d.2b8d4329_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable 320/360 Gear doors

I used the Lancair recommended "pop rivet" method to attach the gear door hi= nge half to the fuselage (thru the imbedded aluminum).  The forward few= rivets of the main gear doors started to get loose at about 300 hours and a= ll those rivets were easily replaced with AN3 bolts thru the cockpit closeou= t rib. 

However, at this annual condition inspection, I noticed that the forward 4 o= r 5 nose gear door hinge/fuselage rivets were also working loose.  Bolt= s are not applicable here because the cockpit side of the nose gear tunnel a= t the hinge line is under the floor and is further hidden by the tubes for b= rake and electrical lines.

Today, I drilled out all of the original rivets. I also had to drill thru th= e harder pop rivet setting shaft.  In doing so, the drill vibrated and=20= enlarged the hole. I should have then cleaned up the holes and obtained over= size rivets for a proper fit and thats what you should do if you have this p= roblem.

But no, I have 1/8 inch stainless steel pop rivets (much hardier than alumin= um) from another airplane project and so I installed those.  I will rep= ort back at a future date on whether these harder rivets make up for the loo= se holes they were installed into. Lord knows how difficult those will be to= drill out!

Scott Krueger
N92EX --part1_24.3870305d.2b8d4329_boundary--