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Subject: Re: [LML] LIV landing gear anomaly
From: "William A. Hogarty" <billhogarty@gmail.com>
X-Original-To: Lancair Mailing List <lml@lancaironline.net>
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Hello Fred:

Had something similar happen last year in flight.  Turned out the gear
handle was binding on the cover panel and wasnt traveling the last 1/8
inch.  Got some real funny results.  Simple fix..  Good Luck

Bill H.

On Mon, Apr 2, 2012 at 7:50 AM, Frederick Moreno <
frederickmoreno@bigpond.com> wrote:

>    Here is an interesting couple of events with nothing relevant found in
> the archives.   Aircraft has an estimated 300 take off and landing cycles
> since new.
>
> About three flights a go I took off and raised the gear.   One main came
> up, showed yellow, one stayed down and showed green, and the nose stayed
> down and showed green.  Makes for a funny looking light display on the
> panel. Recycled gear, no problem, and none in subsequent flights.
>
> Last flight, after flying an hour to a fly in, staying five hours (cool
> day), I took off, nose gear retracted and showed yellow, but mains stayed
> down and showed green.  Recycled gear, no problem.
>
> When I got home, I jacked up the gear and did various retraction tests.
> In each case, the nose came up first and mains followed.  A buddy applied
> about 20-30 pounds of "air load" to the left main before retraction but to
> no effect.  Again,  nose came up first and mains followed immediately after
> the nose wheel banged against the stop.  Hmmmm....
>
> Our initial theory was electrical contactor fault, but nothing was found
> in ground tests. Initial theories about pressure switch dead band (checked
> OK, about 1100 on, 1200-1220 off) went out the window with the results of
> the ground retraction tests.
>
> Thoughts among the landing gear cognoscenti?
>
> Fumbling Fred
>

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<div>Hello Fred:</div>
<div>=A0</div>
<div>Had something similar happen last year in flight.=A0 Turned out the ge=
ar handle was binding on the cover panel and wasnt traveling the last 1/8 i=
nch.=A0 Got some real funny results.=A0 Simple fix..=A0 Good Luck</div>
<div>=A0</div>
<div>Bill H.<br><br></div>
<div class=3D"gmail_quote">On Mon, Apr 2, 2012 at 7:50 AM, Frederick Moreno=
 <span dir=3D"ltr">&lt;<a href=3D"mailto:frederickmoreno@bigpond.com">frede=
rickmoreno@bigpond.com</a>&gt;</span> wrote:<br>
<blockquote style=3D"BORDER-LEFT:#ccc 1px solid;MARGIN:0px 0px 0px 0.8ex;PA=
DDING-LEFT:1ex" class=3D"gmail_quote">
<div style=3D"MARGIN:5px 10px 0px;FONT-FAMILY:Arial;FONT-SIZE:12pt" bgcolor=
=3D"#ffffff">
<table border=3D"0" cellspacing=3D"0" cellpadding=3D"2" width=3D"100%">
<tbody>
<tr>
<td style=3D"DIRECTION:ltr;FONT-SIZE:12pt" width=3D"100%">
<div style=3D"PADDING-LEFT:2px">
<div>Here is an interesting couple of events with nothing relevant found in=
 the archives.=A0=A0 Aircraft has an estimated 300 take off and landing cyc=
les since new.</div>
<div>=A0</div>
<div>About three flights a go I took off and raised the gear.=A0=A0 One mai=
n came up, showed yellow, one stayed down and showed green, and the nose st=
ayed down and showed green.=A0 Makes for a funny looking light display on t=
he panel.=A0Recycled gear,=A0no problem, and none in subsequent flights.=A0=
 </div>

<div>=A0</div>
<div>Last flight, after flying an hour to a fly in, staying five hours (coo=
l day), I took off, nose gear retracted and showed yellow, but mains=A0stay=
ed down and showed green.=A0 Recycled gear, no problem. </div>
<div>=A0</div>
<div>When I got home, I jacked up the gear and did various retraction tests=
.=A0 In each case, the nose came up first and mains followed.=A0 A buddy ap=
plied about 20-30 pounds of &quot;air load&quot; to the left main before re=
traction but to no effect.=A0 Again,=A0 nose came up first and mains follow=
ed immediately after the nose wheel banged against the=A0stop.=A0 Hmmmm....=
</div>

<div>=A0</div>
<div>Our initial theory was electrical contactor fault,=A0but nothing was f=
ound in ground tests.=A0Initial theories about=A0pressure switch dead band =
(checked OK, about 1100 on, 1200-1220 off) went out the window with the res=
ults of the ground retraction tests. </div>

<div>=A0</div>
<div>Thoughts among the landing gear cognoscenti?</div>
<div>=A0</div>
<div>Fumbling Fred</div></div></td></tr>
<tr>
<td width=3D"100%">
<table cellspacing=3D"0" cellpadding=3D"0" width=3D"100%">
<tbody>
<tr>
<td width=3D"100%"></td>
<td valign=3D"bottom" align=3D"middle"></td></tr></tbody></table></td></tr>=
</tbody></table></div></blockquote></div><br>

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