Today's Message Index:
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1. 01:05 AM - Re: One the hunt for one pesky gremlin (Richard Kelley)
2. 01:25 AM - Re: CJ6 Prop O/H manual (Harv)
Message 1
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| Subject: | Re: One the hunt for one pesky gremlin |
Check end play of the shaft on the carburetor
Thug
Sent from my iPhone
> On May 26, 2017, at 11:23 PM, Roger Kemp <f16viperdoc@me.com> wrote:
>
>
> Did you pull the fenestrated fuel filter in the carburetor throat. Fragments
of the inner lining of the fuel line can break off and block fuel flow threw the
carb. That caused an engine stoppage at 50ft AGL on TO in my 50. The engine
did very similar but nothing could be found.
> Doc
>
> Sent from my iPad
>
>> On May 26, 2017, at 6:22 PM, Gazoo <stefancorriveau@hotmail.com> wrote:
>>
>>
>> Well, my Yak season is off to a very slow start due to a phantom gremlin stuck
inside my airplane.
>>
>> 1st start and attempted run-up
>>
>> My first start of the season was a difficult one which required much coaxing
but resulted in success after numerous attempts and nitrogen bottles. The first
run-up was conducted with cowlings off to check for oil leaks following a
compressor change-out. Given the ambient temperature at the time and no cowls,
it took approximately fifteen minutes to come up to temperature.
>>
>> The engine ran smoothly during the warm up at 40% except ran rough once about
midway thru for about five seconds but then ran smooth once again after momentarily
changing power setting.
>>
>> Just as oil temp was approaching 40C and CHT 140C, the idle started to hunt
between 40% and 35%. I glanced quickly at the fuel pressure and it was holding
at 0.4. After three rapid increases and decreases in RPM, the engine just smoothly
quit.
>>
>> No restart was attempted because at first we suspected fuel blockage so a tear
down of the fuel system was completed to find the issue, however, no anomalies
were found. The fuel system was checked over during the annual and all fuel
screens, which were clean, were checked at that time, however, we checked them
again. All were clean and in good condition.
>>
>> 2nd start and run-up
>>
>> After putting the airplane back together, engine started no problem this time
and ran beautifully smooth for the entire warm-up and run-up. All engine parameters
were normal. Engine was run for approximately 20 mins.
>>
>> 3rd start and run-up
>>
>> Same story as the second, engine started no problem and ran beautifully smooth
for the entire warm-up and run-up. All engine parameters normal. Engine was
run for approximately 20 mins. Only anomaly found was a broken line from the
compressor to the snot valve.
>>
>> At this point, whatever clean-up and recheck of the fuel system we had done
was leading us to believe that the issue may have been a one-time event, but with
no hard and fast culprit in custody, we were suspicious that the problem was
not corrected so more run-ups were in order.
>>
>> 4th start and attempted run-up
>>
>> Engine started beautifully on very little prime and ran smoothly. It took about
five minutes to get up to temp and just as oil temp was approaching 40C and
CHT 140C, then engine again just smoothly quit despite adding throttle to compensate
for the dropping RPM. Fuel pressure held steady at 0.4 throughout.
>>
>> A few phone calls were made and we were advised to check for blockage in the
fuel vents. These were checked and flushed these with compressed air.
>>
>> 5th start and attempted run-up
>>
>> After flushing the fuel vents, we started up again. Smooth start and run but
within the same timeframe and temps, the engine just smoothly quit. Fuel pressure
again held steady at 0.4 throughout.
>>
>> 6th start and run-up
>>
>> This time we elected to try another restart immediately so with only one shot
of prime to the cylinder side, the engine again started right up and ran beautifully
and continued to do so through the entire run-up. We ran it for 20 mins
with no anomalies.
>>
>> We are now officially, totally at a loss as to what could be the cause.
>>
>> --------
>> Stefan Corriveau
>> stefancorriveau@hotmail.com
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=469626#469626
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
Message 2
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| Subject: | Re: CJ6 Prop O/H manual |
Failing finding an O/H manual would anyone have a set of periodic inspection criteria
for say 3 & 6 year inspection actions they'd be willing to share?
Calling Walt Lannon :D
Cheers
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=469638#469638
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