= wrote: > Thanks for the heads up. Not quite sure what I will do with the = information. >=20 > It seems to me that when Ed Smith had his "incident" there was some = discussion on LML about similar crankshaft separations in the original = Malibu engine / prop combination that our Lancair set-up is based upon. = I even recall seeing a photo of the front of a Malibu with no prop. = Instead it had a gaping hole in the crankshaft showing where all the oil = leaked out. There may be additional information from the FAA or = Continental if you add in the Malibu fleet. >=20 > Barry Knotts > LIV-Ps, N4XE and N24XE > =20 > On 7/21/2013 11:54 PM, Robert R Pastusek wrote: >> Gentlemen, >> =20 >> This is an alert for a potentially serious problem with the = Continental IO/TSIO-550 engine/Hartzell 78=94 Scimitar propeller = combination=20 >>=20 >> Thanks, >> Bob Pastusek >> For LOBO >=20 --Apple-Mail=_4F7215F4-6401-47F1-9E1C-973094EEB046 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 I = will attempt a reply here to Barry and others who have this = combination:

If:

1. you have = this combination of engine / prop (in any airframe, I've spoken to = non-Lancair folks that have the same issue)

2. you have an = engine vibration that normal methods can't solve (dynamic balance, motor = mount change, etc.)

3. you have a vibration that changes with = RPM or comes and goes over the course of a long = flight

Then I suggest you remove the prop and = do an eddy current / dye penetrant check of the prop flange. = Especially if you have been living with this issue for a while = (like I did), thinking it is an annoyance. It doesn't feel = dangerous, just annoying. But it may be something bigger. = I'm glad I didn't let it lie any = longer.

Bob = R

On Jul 22, 2013, at 8:27 AM, F. Barry Knotts <bknotts884@earthlink.net> = wrote:

=20 =20
Thanks for the heads up. Not = quite sure what I will do with the information.

It seems to me that when Ed Smith had his "incident" there was some discussion on LML about similar crankshaft separations in the original Malibu engine / prop combination that our Lancair set-up is based upon. I even recall seeing a photo of the front of = a Malibu with no prop. Instead it had a gaping hole in the crankshaft showing where all the oil leaked out. There may = be additional information from the FAA or Continental if you add in the Malibu fleet.

Barry Knotts
LIV-Ps, N4XE and N24XE

On 7/21/2013 11:54 PM, Robert R Pastusek wrote:
=
Gentlemen,
 
This is an alert for a potentially serious =
problem with the Continental IO/TSIO-550 engine/Hartzell 78=94 Scimitar propeller combination =
Thanks,
Bob Pastusek
For LOBO

= --Apple-Mail=_4F7215F4-6401-47F1-9E1C-973094EEB046--