Today's Message Index:
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1. 04:03 PM - Re: The value of FMEA (johnbright)
2. 08:15 PM - Re: Re: The value of FMEA (Stuart Hutchison)
3. 09:06 PM - Re: Too many Circuit breakers.... (andymeyer)
Message 1
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| Subject: | Re: The value of FMEA |
nuckolls.bob(at)aeroelect wrote:
> ... Do I recall that he experienced engine stoppage earlier in the flight as
well?....
Engine stumbled at 36:17 in the video... went from 4k to 1k rpm and back up to
4k twice.
At 43:00 in the video he mentions checking switches and circuit breakers but it's
not clear to me he checked the 30A main bus breaker that is higher up on the
right. By this time he had tried to shake the gear down a couple times and he
was glide-able to the airport.
Events are tabulated at 50.37 in the video... clip of table attached here. Stumble
at flight time 45:46 and quit at 56:11.
--------
John Bright, RV-6A, at FWF, O-360
Z-101 single batt dual alt SDS EM-5-F.
john_s_bright@yahoo.com, Newport News, Va
https://drive.google.com/folderview?id=1u6GeZo6pmBWsKykLNVQMvu4o1VEVyP4K
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=506725#506725
Attachments:
http://forums.matronics.com//files/2022_05_10_18_38_34_801.jpg
Message 2
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| Subject: | Re: The value of FMEA |
He makes the point that he was distracted by various things we know why. It was
interesting that the low voltage idiot light was flashing for so long unnoticed,
which ought to be a bold face emergency action item with an electrically
dependent engine. It really doesnt matter much what is fault or design flaw is
causing the low voltage at that point (except maybe checking the Alternator
switch and field CB hasnt tripped) because the engine is inevitably about to stop
an obvious priority.
Kind regards, Stu
Sent from my iPhone
> On 11 May 2022, at 09:12, johnbright <john_s_bright@yahoo.com> wrote:
>
>
>
> nuckolls.bob(at)aeroelect wrote:
>> ... Do I recall that he experienced engine stoppage earlier in the flight as
well?....
>
>
> Engine stumbled at 36:17 in the video... went from 4k to 1k rpm and back up to
4k twice.
>
> At 43:00 in the video he mentions checking switches and circuit breakers but
it's not clear to me he checked the 30A main bus breaker that is higher up on
the right. By this time he had tried to shake the gear down a couple times and
he was glide-able to the airport.
>
> Events are tabulated at 50.37 in the video... clip of table attached here. Stumble
at flight time 45:46 and quit at 56:11.
>
> --------
> John Bright, RV-6A, at FWF, O-360
> Z-101 single batt dual alt SDS EM-5-F.
> john_s_bright@yahoo.com, Newport News, Va
> https://drive.google.com/folderview?id=1u6GeZo6pmBWsKykLNVQMvu4o1VEVyP4K
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=506725#506725
>
>
>
>
> Attachments:
>
> http://forums.matronics.com//files/2022_05_10_18_38_34_801.jpg
>
>
>
>
>
>
Message 3
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| Subject: | Re: Too many Circuit breakers.... |
Drew this up in upverter.com... Not the best for schematics, but I think this gets
the idea across. Pinouts of devices aren't defined here. Fuse Blocks are
the above recommended fuse blocks.
The AV30E needs at most 2 amps. (attitude indicator)
The Engine Monitor needs at most 1 amp.
The IFD GNS side - max 7.5 amps, but it's got diode OR'd inputs on the GNS side.
IFD Comm side doesn't have dual inputs for some reason. Might diode OR those externally
- needs 10 amps.
If no to the diodes, what bridge rectifier is recommended?
Those are the 3 things I need to get somewhere if things go bad. Master relay craps
out, etc...
Not sure if this link will get you to the source drawing, but it might... https://upverter.com/design/meyerkc135/62568e2b082ab4c7/aircraftarchitecture/
Plan is to replace the PC680 and the backup battery every 3 years.
Trying to keep it simple. Looking at what I currently have, I've got little protection
from the dark and stormy, though I can (with conservative weather planning)
get somewhere on one mag and the AV30 (backup battery). I'm loosing the
mag for the second ignition.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=506729#506729
Attachments:
http://forums.matronics.com//files/1344tdraft_196.png
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