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Date: Sat, 18 Apr 2009 06:27:23 -0500
Message-ID: <5cf132c0904180427s447829dam190679e0ab3c0b31@mail.gmail.com>
Subject: Re: [FlyRotary] It's an airplane. \ Gearbox Chip Detector
From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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...or drive you nuts disassembling and reassembling your gearbox.  ;-)>


On Fri, Apr 17, 2009 at 9:40 PM, Bobby J. Hughes <bhughes@qnsi.net> wrote:

>  DAR inspected the plane on Thursday and issued Phase 1 restrictions.
> After closing the covers I taxied out for more tuning. My chip detector went
> off so back to the hanger. I pulled the magnetic plug and could see one
> small chip. It was a little smaller than a pin head. Since it was the third
> warning in 18 hours I decided to dissemble the gearbox and take a look. Much
> to my surprise I couldn't find any problem with the internals. Bearings,
> gears and the spline all looked perfect. I did find extra RTV in the
> machined pocket by one of the oil drain holes. Fortunately it had adhered to
> the aluminum and was not blocking the oil exit.  The chip detector is
> located in a machined aluminum block between the gearbox oil exits and the
> oil pan. The block also has a temperature sensor. The detector may be overly
> sensitive but I am confident it will provide advanced warning of a major
> problem.
>
> Bobby Hughes
> RV10 Supercharged Renesis.
>
>
>
>

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...or drive you nuts disassembling and reassembling your gearbox.=A0 ;-)&gt=
;<br><br><br><div class=3D"gmail_quote">On Fri, Apr 17, 2009 at 9:40 PM, Bo=
bby J. Hughes <span dir=3D"ltr">&lt;<a href=3D"mailto:bhughes@qnsi.net">bhu=
ghes@qnsi.net</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, =
204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">



<div>
<div><font face=3D"Arial" size=3D"2"><span>DAR inspected the=20
plane on Thursday and issued Phase 1 restrictions. After closing the covers=
 I=20
taxied out for more tuning.=A0My chip detector went off so=A0back to the=20
hanger. I pulled the magnetic plug=A0and could see=A0one small chip. It=20
was a little smaller than a pin head. Since it was the third warning in 18 =
hours=20
I decided to dissemble the gearbox and take a look. Much to my surprise I=
=20
couldn&#39;t=A0find any problem with the internals. Bearings, gears and the=
=20
spline all looked perfect. I did find extra RTV in the machined pocket by o=
ne of=20
the oil drain holes. Fortunately it had adhered to the aluminum and was not=
=20
blocking the oil exit.=A0=A0The chip detector is located in a machined=20
aluminum block between the gearbox oil exits and the oil pan. The block als=
o has=20
a temperature sensor. The detector may be overly sensitive but I am confide=
nt it=20
will provide advanced warning of a major problem. </span></font></div>
<div><font face=3D"Arial" size=3D"2"><span></span></font>=A0</div>
<div><font face=3D"Arial" size=3D"2"><span>Bobby=20
Hughes</span></font></div>
<div><font face=3D"Arial" size=3D"2"><span>RV10 Supercharged=20
Renesis. </span></font></div>
<div><font face=3D"Arial" size=3D"2"><span></span></font>=A0</div>
<div>=A0</div>
<div align=3D"left"><font face=3D"Arial" size=3D"2"></font>=A0</div></div>
</blockquote></div><br>

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