Sender: <marv@lancaironline.net>
To:  lml@lancaironline.net
Date: Mon, 05 Jan 2009 12:32:44 -0500
Message-ID: <redirect-3411523@logan.com>
Received-SPF: none
 receiver=logan.com; client-ip=209.85.146.176; envelope-from=mickguinn@clearwire.net
From: "Mick Guinn" <mickguinn@clearwire.net>
References: <list-3410721@logan.com>
In-Reply-To: <list-3410721@logan.com>
Subject: Re: [LML] L-IVP  Cracked Windshield
MIME-Version: 1.0
Content-Type: text/plain;
	format=flowed;
	charset="iso-8859-1";
	reply-type=response
Content-Transfer-Encoding: 7bit

We've stop drilled and sown up non-pressurized, flight-test aircraft 
windshields with safety wire as described in AC43.13. It worked for short 
tests during non-pressurized flight, but I would not recommend anything like 
this for a permanent repair. If the windshield gives up in flight, you have 
a whole new set of problems. Replacement is the only safe and sure way.
Sounds like you have other contributing factors.
Fly safe.

Mick Guinn
Right Seat Mechanical
541-419-8661
Rightseatmech.com


----- Original Message ----- 
From: "billhogarty" <billhogarty@hughes.net>
To: <lml@lancaironline.net>
Sent: Sunday, January 04, 2009 5:03 PM
Subject: [LML] L-IVP Cracked Windshield


> Going to need some help on this one.
>
> Left plane for two nights parked outside at Reno.  The canopy was 
> completely covered.  No snow and temperatures remained above freezing. 
> Returned to find a crack in the center of the bottom of the windshield, 
> extending vertically about 5 inches. BUMMER
> This plane suffered a traumatic incident back in 2003 when the gear folded 
> during takeoff at North Las Vegas.  In addition to the gear, engine mount, 
> and wing damage, a cracked brace behind the firewall in the nose gear 
> tunnel was replaced.  This brace turns out to be directly under the 
> windshield and the original stress on the brace could possibly be the 
> cause of the resulting windshield crack even though it took several years 
> to appear.......MAYBE.??
>
> Anyway, this plane has had pressurization problems from day one;  with 2 
> psi being the best the cabin has held so far, so I dont think that the 
> pressure could be the cause of the crack even though it might have helped 
> it along......MAYBE??????
>
> Anyway, since I have no real experience with Plexiglas, I am hoping to get 
> some help from anyone on the LML.
> One possibility that has been discussed is as follows:  Stop-drill the 
> crack.  Apply an inverted 'V' shaped C/F patch at the bottom of the inside 
> of the windshield to cover the crack;  then drip some commercial 
> windshield sealer down into the top of the crack on the outside;  followed 
> by another similar C/F patch on the outside of the windshield.
> Does anyone think that this fix might work??  Anyone have any other ideas?
> Appreciate the help.  Regards, Bill Hogarty
>
>
>
>
> --
> For archives and unsub 
> http://mail.lancaironline.net:81/lists/lml/List.html