bavareze Posted June 15, 2020 Report Posted June 15, 2020 Hi. In first picture: where do I need to apply sealant before attaching the avionics cover? second: how important is that rubber boot and what makes it necessary? How do you replace it? thanks Quote
N201MKTurbo Posted June 15, 2020 Report Posted June 15, 2020 The sealant usually goes where the groove on the left and the groove on the right. You just have to kind of look at it and make sure it is sealed or it will rain on your feet and radios. The trim screw boot needs to be replaced. Otherwise the grease will get dirty. Which is bad for your trim system. Quote
bavareze Posted June 15, 2020 Author Report Posted June 15, 2020 1 hour ago, N201MKTurbo said: The sealant usually goes where the groove on the left and the groove on the right. You just have to kind of look at it and make sure it is sealed or it will rain on your feet and radios. The trim screw boot needs to be replaced. Otherwise the grease will get dirty. Which is bad for your trim system. so which lines get covered with sealant? and why do i have a groove between red and magenta? I noticed there is a matching hole on the outer cover (the one that is missing) so I'm guessing that's some sort of drain. Is that right? Quote
0TreeLemur Posted June 15, 2020 Report Posted June 15, 2020 Regarding sealing the instrument access, @Hector provided a good, workable solution. You probably would do yourself a favor to fashion a "roof" over your avionics stack to prevent falling water from ruining your gps. 1 Quote
N201MKTurbo Posted June 15, 2020 Report Posted June 15, 2020 34 minutes ago, bavareze said: so which lines get covered with sealant? and why do i have a groove between red and magenta? I noticed there is a matching hole on the outer cover (the one that is missing) so I'm guessing that's some sort of drain. Is that right? The groove between the red and magenta is to channel water out the hole on the covers. When I had my F Mooney it had putty in the channel, which defeats the channel's purpose, but it never leaked. Quote
47U Posted June 16, 2020 Report Posted June 16, 2020 At the risk of spreading heresy, I’m not sure the stab trim jackscrew boot does all that much good. The concept is sound, but in application problematic. There’s not much room in there to hold the boot clear of the jackscrew so the old grease can be removed and new grease reapplied. Even with the stab trim run all the way to the stop. The result is, too many times new grease gets applied on top of old grease and no effective cleaning ever gets done. This just looks like a mess and certainly isn’t ‘clean.’ My C didn’t have a boot on it when I got it in 2008. The grease was in pretty bad shape and I suspect it hadn’t had a good cleaning for decades, even without the boot. I got all the old grease cleaned out and replied new grease and now it’s a fairly painless process every annual to clean and re-lube it. The flat panel fuselage fairings keep the cavity covered and protected from dirt and water. I think that unless you frequent unapproved strips, the boot is overkill. A good cleaning of the jackscrew once a year and clean grease applied is probably better than lots of Mooneys who have the boot and get marginal service because the access is so poor. Just say’n. tom 2 Quote
Yetti Posted June 17, 2020 Report Posted June 17, 2020 (edited) For the front I would visit the homer dan weather stripping section for some flat. I found some 1/2" round foam pavement expansion joint that works in the channel in the back. Installed with contact cement. Just glue in the channel. Edited June 17, 2020 by Yetti Quote
carusoam Posted June 17, 2020 Report Posted June 17, 2020 Take your findings to the next level... Expect to find the same grease hiding in a few other important areas... Trim screw, gearbox, and everywhere else grease was used... There is even a gearbox under the trim wheel that needs some love every now and then... For some reason grease turns to rocks over a decade of time... Brake fluid turns to gelatinous sticky stuff.... Oil simply doesn’t wait so long to go bad... Don’t use unapproved runways.... Siri isn’t familiar with unimproved runways... PP thoughts only, not a mechanic... Best regards, -a- Quote
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