Europa-List Digest Archive

Sat 07/11/20


Total Messages Posted: 2



Today's Message Index:
----------------------
 
     1. 07:07 AM - Re: LG frame cracks (Pete)
     2. 10:48 AM - Europa MT04 engine mounts (Erich Trombley)
 
 
 


Message 1


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    Time: 07:07:33 AM PST US
    Subject: Re: LG frame cracks
    From: Pete <peterz@zutrasoft.com>
    Hi Jim, I am in process of removing my gear frame to repair/replace the bent bottom gear pivot tube (present since my purchase, and likely made worse with my side-loading since), and short of replacing the frame, would like to strip and inspect the entire frame. How did you get the frame to un-bond from the epoxy tunnel bedding? What method did you use to strip the paint/powdercoating? Can you tell me if the Tubes are all 4130? Thanks for your detailed pdf report of the cracks, added to my inspection/reenforcing list. Cheers, Pete > On Nov 12, 2018, at 2:52 PM, h&amp;jeuropa <butcher43@att.net> wrote: > > > We discovered a potential safety issue and wanted to share this so others become aware of the situation and can inspect their aircraft. > > We are in the process of our annual condition inspection on our mono wheel. This year is extensive since motor mounts and bungee cord need replaced. After being alerted by John Wigney of possible cracks in the lower tubes of the LG frame, we inspected and discovered our frame is cracked like his. The cracks are very difficult to find as they are somewhat hidden by the firewall and behind the vertical tubes of the frame. Using Johns photos, a strong light, and magnifying glass, we were able to see a crack in the starboard tube. A photo with our iPad actually gave the best indication of a crack. A dye penetrant test confirmed the crack. The crack in the port tube wasnt evident until the powder coat was removed. The attached document has good photos of Johns cracks. > > We removed the frame and had it repaired by an experienced A&P (FAA mechanic) using techniques called out in AC 43-13. We reamed out the tubes and machined a tube to be a tight fit similar to Mod 72 for the upper tubes except the insert is the full length of the tube. The insert is welded to the original tube with rosette welds, and the cracks were stop drilled prior to welding. One bolt hole was elongated so we changed it to AN4. > > A side note, when we started to remove the LG frame, we found that some of the mounting bolts were no longer tight. When doing your inspection, we suggest you check these nuts and if any are at all loose, inspect very carefully for cracks. > > Our mono wheel kit was purchased April 2000, kit A185 and has 975 hours. > > Jim & Heather > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=484894#484894 > > > > > Attachments: > > http://forums.matronics.com//files/181001a_photo_summary_of_landing_gear_frame_cracks_131.pdf > > >


    Message 2


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    Time: 10:48:13 AM PST US
    From: Erich Trombley <erichdtrombley@juno.com>
    Subject: Europa MT04 engine mounts
    Hello, Can anyone tell me what the uncompressed length/height of a new uninstalled MT04 is? I measured the ones I recently removed and they vary considerably and obviously have taken a set. I suspect they are something close to .970 or 24.6mm. As noted in a previous email, I switched to Lord J3608-1 mounts. I contacted Lord for the recommended preload, however, they indicated there were too many variable to take into consideration. That said, they provided me with a drawing for the 0-200 motor, which isnt very helpful, I am afraid. Interestingly, I noted two very distinct differences in the Lord mounts as compared to the MT04s. First is the hardness, the Lord mounts are quite a bit softer. And the second, which surprised me, is the uncompressed length/height which I had incorrectly assumed to be the same the MT04. You know what they say when you assume something. Anyway the Lord mounts are shorter, by how much I cant say at the moment as I require the uncompressed dimension of the MT04. Armed with this information I should be able to trim the space by the delta, which I am hoping will provide the necessary preload. Kind regards, Erich N28ET Classic Monowheel 914 ____________________________________________________________ Sponsored by https://www.newser.com/?utm_source=part&utm_medium=uol&utm_campaign=rss_taglines_more Roger Stone Commutation Ups Outrage to Fever Pitch http://thirdpartyoffers.juno.com/TGL3131/5f09faa73d807aa66ef8st04vuc1 COVID Surge Worries Experts: 'Early Wave of a Lot of Suffering' http://thirdpartyoffers.juno.com/TGL3131/5f09faa71e7917aa66ef8st04vuc2 Amid Spread of Misinformation, Whispers on FB's Next Move http://thirdpartyoffers.juno.com/TGL3131/5f09faa73db847aa66ef8st04vuc3




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