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loboloda(at)execulink.com
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 Posted: Tue Sep 14, 2010 6:55 am Post subject: Fwd: Tech Help re 914 |
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Hi All,
I am forwarding this on behalf of Chris Staines, his Europa is now
parked midway between Ottawa and London, Ont, following some problems
on the return flight.
Ferg has kindly agreed to lend Chris his trailer to retrieve the
aircraft, but as it will be at least a 4 hour drive each way, it
would be nice if we could fly there and effect a repair.
Any suggestions for trouble shooting the problem would be welcomed.
Dave C-FBZI
| Quote: | >
>
> I experienced a partial engine failure, Rotax 914UL.This engine
> has about seven hundred
> hours on it and has been in use in my Europa for ten years.
>
> The symptoms were as follows.
>
> The roughness slowly became worse and could only be reduced by
> flying at a lower altitude and reducing power.Removing 'boost' and
> running at lower pressure caused
> the roughness to disappear but resulted in a loss of airspeed and
> altitude.Applying throttle cause the engine to stumble and almost
> stop.
>
> On the ground the plugs were noted to have a light layer of black
> carbon on them,in contrast to their usual tan colour.Replacing the
> plugs did not help.The engine
> is usually operated on a premium car gas known to be alcohol
> free,though for this flight it was partially filled with avgas
> (about 60%).
> If you could give me some ideas on what to check it would be
> greatly appreciated.
>
> Sincerely,Chris Staines
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rparigoris
Joined: 24 Nov 2009
Posts: 791
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| Posted: Tue Sep 14, 2010 7:28 am Post subject: Re: Fwd: Tech Help re 914 |
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Hi Dave
First check for a clogged air filter, but I kinda think the black on plugs may not be telling you the real problem.
Off the cuff it sounds like he is running out of gas.
Does he have a differential fuel pressure gauge? Does turning on second fuel pump help?
I suspect it may be as simple as having a clogged fuel filter/s or gasculator/s.
Also check the fuel tank vent for clogging.
Could be the outlet/s of fuel tank are clogged? does turning to reserve help?
Try a check for differential fuel pressure as per Rotax manual, also look up Europa FWF and check their cheat the fuel pressure regulator to thinking you are at high altitude and measuring fuel flow.
When was last time carbs were looked at? To be safe make sure you change float bowl gaskets which you can have leak pressure and cause this sort of thing, but if you can't have a look at jets and clean them.
Look very careful at plumbing little lines going to carb and fuel pressure regulator for cracks, splits and kinks.
If cowl is off have a look for broken / leaking exhaust and no soot on exterior of carbs.
I will have my cell phone on today 631-839-3636 after about noon.
One more thing, if you never cleaned the sock filters in the fuel pump intake consider them perhaps dirty.
Report back on findings and I will add that to equation.
Good luck.
Ron Parigoris
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kheindl(at)msn.com
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| Posted: Tue Sep 14, 2010 10:57 am Post subject: Fwd: Tech Help re 914 |
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It sounds like a simple case of fuel starvation. Maybe a blockage in the fuel line, clogged filters, debris in carburetor. The first thing I would check is the fuel flow, with engine off, disconnect fuel hose at engine side, and pump into a bucket for a minute, then measure.Good luck,
Karl
| Quote: | From: loboloda(at)execulink.com
Subject: Fwd: Tech Help re 914
Date: Tue, 14 Sep 2010 11:04:16 -0400
To: europa-list(at)matronics.com
--> Europa-List message posted by: david miller <loboloda(at)execulink.com>
Hi All,
I am forwarding this on behalf of Chris Staines, his Europa is now
parked midway between Ottawa and London, Ont, following some problems
on the return flight.
Ferg has kindly agreed to lend Chris his trailer to retrieve the
aircraft, but as it will be at least a 4 hour drive each way, it
would be nice if we could fly there and effect a repair.
Any suggestions for trouble shooting the problem would be welcomed.
Dave C-FBZI
>>
>>
>> I experienced a partial engine failure, Rotax 914UL.This engine
>> has about seven hundred
>> hours on it and has been in use in my Europa for ten years.
>>
>> The symptoms were as follows.
>>
>> The roughness slowly became worse and could only be reduced by
>> flying at a lower altitude and reducing power.Removing 'boost' and
>> running at lower pressure caused
>> the roughness to disappear but resulted in a loss of airspeed and
>> altitude.Applying throttle cause the engine to stumble and almost
>> stop.
>>
>> On the ground the plugs were noted to have a light layer of black
>> carbon on them,in contrast to their usual tan colour.Replacing the
>> plugs did not help.The engine
>> is usually operated on a premium car gas known to be alcohol
>> free,though for this flight it was partially filled with avgas
>> (about 60%).
>>
>>
>> If you could give me some ideas on what to check it would be
>> greatly appreciated.
>>
>> Sincerely,Chris Staines
>
>======================
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>=======
[quote][b]
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loboloda(at)execulink.com
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| Posted: Tue Sep 14, 2010 12:12 pm Post subject: Fwd: Tech Help re 914 |
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Hi Karl, Jerry & Ron,Thanks for the responses.
Chris is parked at Peterborough.
I know he has pumped out the fuel to get rid of the Avgas, my guess is that it is a carb problem.
The weather does not look good for this weekend, so we will probably take the trailer and Chris can check things out when we get back.
I'll advise what caused the problem once it has been sorted.
Dave
On 14-Sep-10, at 2:53 PM, Karl Heindl wrote:
[quote] It sounds like a simple case of fuel starvation. Maybe a blockage in the fuel line, clogged filters, debris in carburetor. The first thing I would check is the fuel flow, with engine off, disconnect fuel hose at engine side, and pump into a bucket for a minute, then measure.Good luck,
Karl
====================
| Quote: |
href="http://www.matronics.com/Navigator?Europa-List">http://www.matronics.com/Navigator?Europa-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
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[b]
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kevann(at)gotsky.com
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| Posted: Tue Sep 14, 2010 2:15 pm Post subject: Fwd: Tech Help re 914 |
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Mine had similar symptoms. I checked and tightened all hose clamps from the
turbo to the carbs. That did it for me.
Kevin
---
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ptag.dev(at)tiscali.co.uk
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| Posted: Tue Sep 14, 2010 2:54 pm Post subject: Fwd: Tech Help re 914 |
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Chris....
Since I've been talking about it on another topic ....where are the carb
bowl pressure balance pipes connected ? Not blocked are they?
Also .....I guess the carb fuel cut off floats are OK ?
Black plugs are telling you over fuel supply somehow or proportionally
shortage of air for clean combustion. Don't suppose any of the air intake
hoses are weak and floppy allowing strangulation?
It the Turbo functioning OK?
Regards
Bob Harrison G-PTAG Rotax 914
--
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