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Subject: Re: [LML] TSIO 550E IV-P vibration
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Have you checked the torque on the bolts that hold the engine mount to the=
 =20
firewall?=20
=20
=20
In a message dated 5/1/2010 11:44:23 P.M. Central Daylight Time, =20
r.rickard@rcginc-us.com writes:

=20
TSIO 550 guys and or smart engine guys:=20
I am having a vibration issue and want to see if anyone has  ideas on what=
=20
to look for.  Basically, at takeoff and climbout to around  10,000=E2=80=
=99, the=20
motor and prop are very smooth and strong.  There is no  vibration (prop=
 very=20
recently balanced) and all numbers are normal.  As I  pass above 10k to th=
e=20
low flight levels, a vibration in the motor starts to  develop, and when=
 I=20
level off and set the engine for cruise (LOP, 18gph, 34  MAP, 2500 RPM) th=
e=20
vibration is at its worst.  It=E2=80=99s almost like the prop  is out of=
 balance,=20
which is why I had the prop balanced at 2500 rpm.   Speeds are good and al=
l=20
engine numbers are normal, no changes.  This will  remain for an hour or=
 2, then=20
the motor seems to magically smooth itself out.  On descent and landing,=
=20
motor seems smooth and all numbers are normal. Very  recently, on a 4.5 ho=
ur=20
flight, about 3.5 to 4 hours in the vibration slowly  came back.  I don=E2=
=80=99t=20
know what to blame, and my motor mechanic is looking  at me funny.  I shou=
ld=20
note that at no time do I think the vibration is  horrible or unsafe, just=
=20
annoying.  I can feel it in the stick and see it  in the panel when its=20
happening.=20
Things I have ruled out:=20
Balance of the prop=20
Dirty plugs or fuel injectors (new plugs and cleaned injectors)=20
Speed effect (increase or decrease speed has no effect)=20
Fuel issues=20
Flight control flutter or anything like that=20
Things that have been suggested:=20
A bad valve in a cylinder that doesn=E2=80=99t show until you get to  alti=
tude,=20
Or bad compression in a cylinder that comes and goes (all cyl=E2=80=99s we=
re comp =20
tested a month ago though)=20
Turbo controller not scheduling properly as you climb=20
Fuel injection system malf?=20
I=E2=80=99m hoping one of you has had this problem and can point me  and=
 the=20
mechanic to the possible culprit.  Appreciate any  comments=20
Bob Rickard=20
IV-P=20


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<HTML xmlns:o =3D "urn:schemas-microsoft-com:office:office"><HEAD>
<META content=3D"text/html; charset=3DUTF-8" http-equiv=3DContent-Type>
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<BODY style=3D"FONT-FAMILY: Arial; COLOR: #000000; FONT-SIZE: 10pt" id=3Dr=
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FONT id=3Drole_document   color=3D#000000 size=3D2 face=3DArial>
<DIV>Have you checked the torque on the bolts that hold the engine mount=
 to the=20
firewall?&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>
<DIV>In a message dated 5/1/2010 11:44:23 P.M. Central Daylight Time,=20
r.rickard@rcginc-us.com writes:</DIV>
<BLOCKQUOTE   style=3D"BORDER-LEFT: blue 2px solid; PADDING-LEFT: 5px; MAR=
GIN-LEFT: 5px"><FONT     style=3D"BACKGROUND-COLOR: transparent" color=3D#=
000000 size=3D2 face=3DCalibri>
  <DIV class=3DSection1>
  <P class=3DMsoNormal>TSIO 550 guys and or smart engine guys:<o:p></o:p><=
/P>
  <P class=3DMsoNormal><o:p>&nbsp;</o:p></P>
  <P class=3DMsoNormal>I am having a vibration issue and want to see if an=
yone has=20
  ideas on what to look for.&nbsp; Basically, at takeoff and climbout to=
 around=20
  10,000=E2=80=99, the motor and prop are very smooth and strong.&nbsp; Th=
ere is no=20
  vibration (prop very recently balanced) and all numbers are normal.&nbsp=
; As I=20
  pass above 10k to the low flight levels, a vibration in the motor starts=
 to=20
  develop, and when I level off and set the engine for cruise (LOP, 18gph,=
 34=20
  MAP, 2500 RPM) the vibration is at its worst.&nbsp; It=E2=80=99s almost=
 like the prop=20
  is out of balance, which is why I had the prop balanced at 2500 rpm.&nbs=
p;=20
  Speeds are good and all engine numbers are normal, no changes.&nbsp; Thi=
s will=20
  remain for an hour or 2, then the motor seems to magically smooth itself=
 out.=20
  On descent and landing, motor seems smooth and all numbers are normal.=
 Very=20
  recently, on a 4.5 hour flight, about 3.5 to 4 hours in the vibration sl=
owly=20
  came back.&nbsp; I don=E2=80=99t know what to blame, and my motor mechan=
ic is looking=20
  at me funny.&nbsp; I should note that at no time do I think the vibratio=
n is=20
  horrible or unsafe, just annoying.&nbsp; I can feel it in the stick and=
 see it=20
  in the panel when its happening.<o:p></o:p></P>
  <P class=3DMsoNormal><o:p>&nbsp;</o:p></P>
  <P class=3DMsoNormal>Things I have ruled out:<o:p></o:p></P>
  <P     class=3DMsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
  Balance of the prop<o:p></o:p></P>
  <P     class=3DMsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
  Dirty plugs or fuel injectors (new plugs and cleaned injectors)<o:p></o:=
p></P>
  <P     class=3DMsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
  Speed effect (increase or decrease speed has no effect)<o:p></o:p></P>
  <P     class=3DMsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
  Fuel issues<o:p></o:p></P>
  <P     class=3DMsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
  Flight control flutter or anything like that<o:p></o:p></P>
  <P class=3DMsoNormal><o:p>&nbsp;</o:p></P>
  <P class=3DMsoNormal>Things that have been suggested:<o:p></o:p></P>
  <P     class=3DMsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
  A bad valve in a cylinder that doesn=E2=80=99t show until you get to=20
  altitude,<o:p></o:p></P>
  <P     class=3DMsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
  Or bad compression in a cylinder that comes and goes (all cyl=E2=80=99s=
 were comp=20
  tested a month ago though)<o:p></o:p></P>
  <P     class=3DMsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
  Turbo controller not scheduling properly as you climb<o:p></o:p></P>
  <P     class=3DMsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
  Fuel injection system malf?<o:p></o:p></P>
  <P     class=3DMsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
  <o:p></o:p></P>
  <P class=3DMsoNormal>I=E2=80=99m hoping one of you has had this problem=
 and can point me=20
  and the mechanic to the possible culprit.&nbsp; Appreciate any=20
  comments<o:p></o:p></P>
  <P class=3DMsoNormal><o:p>&nbsp;</o:p></P>
  <P class=3DMsoNormal>Bob Rickard<o:p></o:p></P>
  <P class=3DMsoNormal>IV-P<o:p></o:p></P>
  <P class=3DMsoNormal><o:p>&nbsp;</o:p></P>
  <P   class=3DMsoNormal><o:p>&nbsp;</o:p></P></DIV></FONT></BLOCKQUOTE></=
DIV></FONT></BODY></HTML>

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