Hey guys, Im really new to Turbines, Just got my waver last week. I got 3 sweet AMT 180 turbines, One in a Jet Centry Delta Dart 106, one in a CAI Rasor, and the last going in a Falcon 120 or othere project.

As I have gotten these motors used, with unknon number of hours, So I figured this winter I would send one in for Service to be safe, I sent a email to AMT Netherlands and there responce was:

<p class="MsoPlainText" style="margin: 0in 0in 0pt"><font face="Consolas">There are a few versions of the Mercury but we do not have any parts any more for the very first version, you can recognize<span style="mso-spacerun: yes"> </span>them with at the<span style="mso-spacerun: yes"> </span>"open" compressor nut.</font></p><p class="MsoPlainText" style="margin: 0in 0in 0pt"><o><font face="Consolas"></font></o></p><p class="MsoPlainText" style="margin: 0in 0in 0pt"><font face="Consolas">I assume that the engines you have are "air start engines", a typical "overhaul" would cost around 750,- Euro (ex<span style="mso-spacerun: yes"> </span>shipping back) depending on the state of the engine. Wich is almsot $1k in US dollars.

Is this the typical rebuild cost?

But my main question is, The turbine guys I fly with tell me they have to send in there turbines after 25 hours, one told me he has sent his in 2 times after his 25hour use with no need to have the bearing changed.

So I was looking around on USMicroJets web site, (the compnay is no more and is up for sale) and on there question section it shows this.</font></p>

<table width="100%"> <tbody> <tr> <td valign="top">Q.</td> <td valign="top">What is the service interval?</td> </tr> <tr> <td valign="top">A.</td> <td valign="top">We recommend that an engine be sent in for a checkup after every 100 hours of service. Note: Although 200 hours of service before rebuild is common, service greatly depends on the application and the environment in which the engine is operated.</td> </tr> </tbody></table>

So whats the deal educate me guys, is it really 100-200 hours but the turbine companys are trying to make some of there money back selling them so cheap by makeing you send them in every 25hours?

Is it becouse our use in Hobby aircraft vs civilan aplication is more prone to dirt?

I was told as long as I hit the Same RPM at wot not to have any worries, wich makes a lot of since. So except useing good oil, is there steps that can help your berrings last longer?

Ie put some trubine oil in the fuel intake line to get a good spash every so often?

Thanks guys Mike