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1998 EC 120 Engine TBO

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1998 EC 120 Engine TBO

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Old 22nd Jan 2013, 08:31
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1998 EC 120 Engine TBO

Greetings

Just wondering if anyone could help me with a query in relation to the TBO on the Arrius 2F - Generally, this is 3000 hours TBO or 15 years?

An engine with serial number 34017 in a 1998 EC120 does this have a TBO of 2500 hours?

I have also heard that Turbomecca can extend the TBO if they are engaged to do regular inspections / borescopes - does anyone have any experience with this..? and is it a possibility..?

As there are quite a few machine now starting to come up for engine overhauls, can anyone enlighten me on expected costs?

Cheers in advance.
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Old 22nd Jan 2013, 09:26
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I don't recall a 2500 hour TBO on the Arrius 2F engines: I'm sure there is a lower limit of 2800 hours, not 2500?

The overhaul life (hours) is based on the modification state of the modules, not the serial number. You need to check the preface sheet(s) and component log cards in the engine log book to ascertain the mod state.

The calendar is fixed at 15 years from manufacture/last overhaul regardless of mod state. However if the engine has been repaired at any point TM can reset the 15 year calendar date. Again, this would be indicated in the engine log book for the engine.

Turbomeca Arrius 2F SL No. 2169 contains all the details on engine TBO. Would suggest you sit down with that (just to make sure I'm not talking rubbish!) and the component log cards.
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Old 22nd Jan 2013, 17:11
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You are right about the reset. At 5 years of age, before my ownership, my current engine went for a rebuild following a hot start. Came back as a zero-timed engine so currently has 8 years to calander limit.
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Old 22nd Jan 2013, 21:47
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I don't think you'll get an extension to the TBO by hours, but Turbomeca seem quite receptive to a 2 or even 4 year extension to the 15 year overhaul life.

Speak to the customer support people at TMUK.
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Old 23rd Jan 2013, 12:01
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EC 120

Thanks for the responses.

So a bit more investigation has revealed that in 2008 at 1045 hours the engine was inspected or repaired as the calender life was reset to 2023. But the hours were not reset i.e currently the logs are showing only 1605 hours remaining to Overhaul. This puts the engine at a TBO of 2800 hours.

Is this because this was one of the earlier EC 120s..? Arrius 2Fs..? And can anyone advise / comment if they have come across this scenario with an older EC 120..?

From the info, do you think the engine just had an inspection or an actual overhaul..?

The machine had its 12 year in 2011
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Old 23rd Jan 2013, 16:14
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Originally Posted by 23 Inches
This puts the engine at a TBO of 2800 hours.

Is this because this was one of the earlier EC 120s..? Arrius 2Fs..?
TBO is determined by the specific modification status of the engine modules, not the age. If the modules have had the relevant modifications carried out the engine will be subject to a 3000 hour TBO.

Later powerplants will obviously leave the production line with more recent modifications embodied at build, thus they will have a higher TBO by default.

From the info, do you think the engine just had an inspection or an actual overhaul..?
I can't remember the exact wording from the TM Service Letter, but it states that the overhaul calendar will be reset if "suitable repair work is carried out" (or words to that effect) . Only the calendar is reset by suitable repair work though, not the hour figure.

If it had an overhaul both the hour and calendar figure would be reset. As the hour figure has not, then it would suggest to me only a "suitable" repair was carried out.

The nature of the work carried out should be clearly indicated with the engine log cards, as should all embodied modifications. Clearly ascertain the mod state and cross refer it to Arrius 2F SL No. 2169.
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Old 23rd Jan 2013, 21:00
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23 inches:

The hours are not reset because the engine was only inspected. If they had bothered to change the bearings etc, then the engine would get a 0.0 TSO update. It is pretty common when TM decide to pull apart an engine for something like a hard landing, that the calendar is zero'd to 15yrs TR.

In my opinion it isn't a cost effective idea to tear down and build up but if you are a private owner then you are hard pressed to use all the 2800hrs on the engine modules regardless and the calendar issue is your biggest problem.

I sell a lot of the EC120's from NZ and Australia these days, drop me a line if you have any other questions. Stephen

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Old 24th Jan 2013, 00:01
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Thumbs up Ec 120

Lads, thanks for all the input.

The logs are in another language, hence the slow realisation as to what has actually happened:

So yes - it appears that the engine modules were reset at the bulletin inspection in 2008 - the logs are stamped accordingly.

So yes - the calendar time limit is 2023 but the hours have not been re-set back to 0 - so its all clearer now - Cheers

Can anyone comment on any other know issues with the earlier EC 120`s - I have picked up form a previous thread that the earlier models are susceptible to CofG issues and this can be remedied by placing ballast plates on the underside of the tail boom.

Any other hidden / know issues with these earlier EC120`s...? The logs do list compliance with severaL SB`S... any really costsly ones that i should be looking our for...?
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