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From: Bill Hannahan <wfhannahan@yahoo.com>
Subject: Temperature spike
X-Original-To: Lancair Mailing List <lml@lancaironline.net>
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=0A=0A=0A=0AHad a similar experience with a 360 A1A. One cylinder=0Adetonat=
ed at high manifold pressure, ran normally at low MP.=0A=0A=A0=0A=0AThe pro=
blem was a broken piece of ceramic in one spark plug,=0Atoo large to fall o=
ut.=20

I detected a slight change in vibration level when it=0Ahappened, so it did=
 not have time to get very hot. I inspected the top of the=0Apiston and cyl=
inder walls for damage through the plug holes and found none.=0A=0A

Regards,  Bill Hannahan =20
wfhannahan@yahoo.com

--- On Tue, 5/19/09, Art Bertolina <artbertolina@earthlink.net> wrote:

From: Art Bertolina <artbertolina@earthlink.net>
Subject: [LML] Temperature spike
To: lml@lancaironline.net
Date: Tuesday, May 19, 2009, 6:39 PM

=0A=0A =0A =0A=0AHad an interesting thing happen on a flight =0Afrom=A0AZ t=
o=0ASo Calif. Cruising at 14500ft had been in cruise =0Aabout=0A40 min. was=
 running 2600RPM 31"=A0 18GPH =0Aabout=0A75 deg. LOP. The temp on #1 cylind=
er went from =0A315=0Ato 500 oil pressure dropped to 15 oil temp went =0Afr=
om=0A178 to 197. I went full rich reduced power to 17" =0Aand =0Awent to ne=
arest airport to land,=A0this action =0Abrought =0Atemps back into normal a=
s well as oil pressure to =0A38.=0AOn the ground I removed the top cowl to =
be sure =0Athere=0Awhere no oil leaks and found non. Refowled plane =0A=0At=
ook off and did some laps in the pattern =0Aeverything=0Anormal started hom=
e and at 8500 ft and 30 minutes =0Alater=0Asame thing CHT 425 oil pressure =
21 oil temp 174. I =0Ahad been flying at 2500/22". I reduced power again an=
d temps =0Acame back down, I continued home. I since have =0Aremoved=0Athe =
cylinder and have had it inspected by 2 =0Acompetent=0Amechanics and no dam=
age.=A0The engine has =0A260hr.s, does=0Aanyone have any ideas as to the pr=
oblem?. Your =0Athoughts=0Aand ideas would be appreciated=0AArt=0A=0A=0A   =
   
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<table cellspacing=3D"0" cellpadding=3D"0" border=3D"0" ><tr><td valign=3D"=
top" style=3D"font: inherit;"><meta http-equiv=3D"Content-Type" content=3D"=
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nator" content=3D"Microsoft Word 10"><link rel=3D"File-List" href=3D"file:/=
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size:10.0pt;=0A=09font-family:"Times New Roman";}=0A</style>=0A<![endif]-->=
=0A=0A<p class=3D"MsoNormal">Had a similar experience with a 360 A1A. One c=
ylinder=0Adetonated at high manifold pressure, ran normally at low MP.</p>=
=0A=0A<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>=0A=0A<p class=3D"MsoNorm=
al">The problem was a broken piece of ceramic in one spark plug,=0Atoo larg=
e to fall out. <br></p><p class=3D"MsoNormal"><br></p><p class=3D"MsoNormal=
">I detected a slight change in vibration level when it=0Ahappened, so it d=
id not have time to get very hot. I inspected the top of the=0Apiston and c=
ylinder walls for damage through the plug holes and found none.<o:p></o:p><=
/p>=0A=0A<br><br><div>Regards,</div>  <div>Bill Hannahan</div>  <div><br><a=
 rel=3D"nofollow" target=3D"_blank" href=3D"mailto:wfhannahan@yahoo.com">wf=
hannahan@yahoo.com</a></div><br><br>--- On <b>Tue, 5/19/09, Art Bertolina <=
i>&lt;artbertolina@earthlink.net&gt;</i></b> wrote:<br><blockquote style=3D=
"border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5=
px;"><br>From: Art Bertolina &lt;artbertolina@earthlink.net&gt;<br>Subject:=
 [LML] Temperature spike<br>To: lml@lancaironline.net<br>Date: Tuesday, May=
 19, 2009, 6:39 PM<br><br><div id=3D"yiv1420322136">=0A=0A =0A =0A<style></=
style>=0A<div><font size=3D"2" face=3D"Arial">Had an interesting thing happ=
en on a flight =0Afrom&nbsp;AZ to</font></div>=0A<div><font size=3D"2" face=
=3D"Arial">So Calif. Cruising at 14500ft had been in cruise =0Aabout</font>=
</div>=0A<div><font size=3D"2" face=3D"Arial">40 min. was running 2600RPM 3=
1"&nbsp; 18GPH =0Aabout</font></div>=0A<div><font size=3D"2" face=3D"Arial"=
>75 deg. LOP. The temp on #1 cylinder went from =0A315</font></div>=0A<div>=
<font size=3D"2" face=3D"Arial">to 500 oil pressure dropped to 15 oil temp =
went =0Afrom</font></div>=0A<div><font size=3D"2" face=3D"Arial">178 to 197=
. I went full rich reduced power to 17" =0Aand </font></div>=0A<div><font s=
ize=3D"2" face=3D"Arial">went to nearest airport to land,&nbsp;this action =
=0Abrought </font></div>=0A<div><font size=3D"2" face=3D"Arial">temps back =
into normal as well as oil pressure to =0A38.</font></div>=0A<div><font siz=
e=3D"2" face=3D"Arial">On the ground I removed the top cowl to be sure =0At=
here</font></div>=0A<div><font size=3D"2" face=3D"Arial">where no oil leaks=
 and found non. Refowled plane =0A</font></div>=0A<div><font size=3D"2" fac=
e=3D"Arial">took off and did some laps in the pattern =0Aeverything</font><=
/div>=0A<div><font size=3D"2" face=3D"Arial">normal started home and at 850=
0 ft and 30 minutes =0Alater</font></div>=0A<div><font size=3D"2" face=3D"A=
rial">same thing CHT 425 oil pressure 21 oil temp 174. I =0Ahad been flying=
 at 2500/22". I reduced power again and temps </font></div>=0A<div><font si=
ze=3D"2" face=3D"Arial">came back down, I continued home. I since have =0Ar=
emoved</font></div>=0A<div><font size=3D"2" face=3D"Arial">the cylinder and=
 have had it inspected by 2 =0Acompetent</font></div>=0A<div><font size=3D"=
2" face=3D"Arial">mechanics and no damage.&nbsp;The engine has =0A260hr.s, =
does</font></div>=0A<div><font size=3D"2" face=3D"Arial">anyone have any id=
eas as to the problem?. Your =0Athoughts</font></div>=0A<div><font size=3D"=
2" face=3D"Arial">and ideas would be appreciated</font></div>=0A<div><font =
size=3D"2" face=3D"Arial">Art</font></div></div></blockquote></td></tr></ta=
ble><br>=0A=0A=0A=0A      
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