---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 05/10/22: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 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 _____________________________________ Time: 04:03:56 PM PST US Subject: AeroElectric-List: Re: The value of FMEA From: "johnbright" 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 _____________________________________ Time: 08:15:42 PM PST US From: Stuart Hutchison Subject: Re: AeroElectric-List: 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 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 _____________________________________ Time: 09:06:23 PM PST US Subject: AeroElectric-List: Re: Too many Circuit breakers.... From: "andymeyer" 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.