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Date: Thu, 12 Sep 2013 08:48:57 -0400
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From: Lancair-ESP <lancair-esp@ustek.com>
Subject: RE: [LML] Re: Teardown and check TSIO550?
Thread-Topic: [LML] Re: Teardown and check TSIO550?
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I have all the data that the Cheltons collect.

R

-----Original Message-----
From: Jeff Edwards [mailto:vtailjeff@aol.com]=20

Do you have any engine data from your EFIS?

AvSafe=20
Jeff Edwards
314.308.6719 mobile
636.532.5638 office
Jeff.edwards@avsafe.com

On Sep 9, 2013, at 5:46 PM, Lancair-ESP <lancair-esp@ustek.com> wrote:

> Bob,
>=20
> There are only 375 hrs on the engine during which time I had not a spec o=
f problem except for one cracked cylinder seat (Performance replaced the cy=
linder at NC). =20
> I take off with the aux pump on, and I have tested the aux and know it is=
 working.  Not surging, but power seems reduced. =20
> Prof. Klaus has offer a couple suggestions and I will have him check the =
EI before I do anything truly expensive.  Thanks for the note about "idle" =
for restart.  Changing shorts in flight is a hassle. =20
>=20
> Robert
> ES-P N301ES
>=20
> -----Original Message-----
> From: Robert R Pastusek [mailto:rpastusek@htii.com]=20
> Sent: Monday, September 9, 2013 1:04 PM
> To: Lancair Mailing List
> Subject: RE: [LML] Teardown and check TSIO550?
>=20
> Robert,
>=20
> You did not say how much time you had on your engine, but if it's not yet=
 to recommended overhaul--which you imply by suggesting an inspection rathe=
r than an overhaul, AND the temps/oil pressure are normal,  I'd look for th=
e cause of roughness. =20
>=20
> The first suspect for me would be the magnetos, and after that, the rest =
of the ignition system. Then the fuel system. Problems with either will cau=
se variations in the CHT/EGT/TITs, but they might be subtle. The ignition s=
ystem is more highly loaded/stressed during high power climbs; if the mags,=
 spark plugs or wiring are breaking down under this load, any of these comp=
onents will cause the engine to run rough, and it should be a "steady" roug=
hness. An in-flight mag check during roughness will isolate this quickly, b=
ut be careful. If the engine quits during this check, you need to pull the =
throttle to idle before turning the mags back to both. Not doing so will ca=
use a very loud bang, and could damage the engine/turbos/exhaust system.
>=20
> If the engine "surges" rather than exhibits steady roughness, suspect the=
 fuel system. Turning the boost pump on low, if it's not already on, should=
 help isolate a fuel issue. If it is on, try high boost...but you may need =
to lean the mixture to keep the engine running.
>=20
> I don't want to discourage you from finding/correcting the problem...and =
ferrying it around to different shops with a known problem is just not smar=
t! There are things that warrant teardown and inspect/overhaul. What you de=
scribe, given that I am not there/don't have specifics, suggests some good =
local troubleshooting before tearing the engine apart however...
>=20
> My two cents.
>=20
> Bob
>=20
> My engine started to run rough on climb out, cleared up, and ran rough ag=
ain. =20
> All the inflight temps and flows were completely in line with previous fl=
ights.
> Ran a new conditional and found nothing amiss.  Compressions good, plugs =
clean, oil filter had no metallic. =20
> Ferried it to Kelly Aerospace for work on the A/C and de-ice (mice in the=
 wing!) and the 45 minute flight was uneventful.
> However when Kelly flight tested the plane it seemed sluggish and it ran =
rough again.
>=20
> Thinking about a tear down and inspection but not expecting a complete re=
build. =20
> Anyone recommended who could be within 1 hr or so of central Ohio?
>=20
> --
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ml