Matronics Email Lists

Hi List,
I have been having an intermittent issue with my right main landing gear on extension.

Here's what we have done to get the overall system in shape:
- removed the cleaned the main landin ...

Hi,
Does anyone know what p/ns are involved in rebuilding a Yak-50 landing gear actuator?

The large seals are 45x35x6mm chevron seals. You can get them at AC Depuydt for ~$20 ea: https://acdepuydt ...

Stratyaks, why do you say that? Curious to know what the concern is on putting a non-silicone-based oil into the system is (e.g. what do you think will happen if a mineral oil is used?) I ask because ...

Thanks for all of these replies. All very helpful, especially the pic of the disassembled LG handle/valve. Hugely helpful in understanding function.

I needed to ferry the plane to someone who had j ...

Thanks - this is a very helpful response and your second message especially makes a lot of sense to me. It brings to mind a few more questions:

1) What is the failure mode for the handle itself? If ...

A question: how do you tell if your landing gear handle is going bad vs. actuator seals failing?

What I observe:
Handle down - air is leaking through the handle. I can't tell which port of the han ...

Hi list,
I smelled a a *very slight* fuel scent in the cockpit today and went fishing for a fuel leak.

It looks like the rigid ~3/4" dia tube that links main & aux tanks has developed a c ...

One quick new datapoint (this problem is notoriously hard to reproduce). Did have another occurrence just a few days ago. Mag checked and there was zero difference between sides.

OK, here I am again with the same problem. Coming into the break today at home airport at full throttle / 82% rpm, all of a sudden had the same engine vibe/ roughness. Pulling throttle back 1/4 did no ...

O great Yak-list:
Does anyone have access to factory-recommended strut pressures for the Yak-50 MLG and tailwheel? We've "felt our way to it" after a strut rebuild but would be good to unde ...

Thanks! Yep, in touch with Mike now.

Also Doug Sapp recommended a "Final Filter" to be added in front of the landing gear selector valve to filter out any foreign matter that we're going ...

If I understand you correctly... when I did this, it was really difficult to align the upper end of the tube into the core. What ended up working was connecting the bottom connection to the cylinder w ...

Hi List,
Awhile back I wrote the list mentioning that there was rust-colored dust coming out of my landing gear selector valve handle.

The (relative) good news is that we've located the rust in a ...

Hi All,
Am looking to buy a spare Series II M14P/PF motor. Would look at a wide range of ages.

If anyone has one they are looking to sell, please contact me off list: apatton (at) gmail.com
Thank ...

Hi All,
Does anyone know if there is any sort of task card / instruction set to replace the seals on a Yak-50 main landing gear strut?

Have been told there are 4 seals (and have ordered kit from M ...

What's interesting is that I tried shutting off the plane today by pulling the fuel shutoff valve several times. The engine dies around 10sec later, but the carb still drips! Was not expecting that.

Hi All,
I've noticed twice now that my carb (overhauled unit w/ ~50 hrs on it) will leak gas after I land and refuel.

More detail:

ø It seems to leak through the throat of the carb
ø It drip ...

Hi all,
I've had a landing gear handle with an intermittent air leak on my Yak-50. I say "intermittent" because it emits a very faint hissing noise when the main air is on... have been flyi ...

An update! Have been much delayed by work and other undesirable activities in my troubleshooting.

Yesterday I pulled cowl and checked tightness of intake tube connections as recommended. Visually i ...

Firstly: huge thanks for all the responses! Smile

Richard - yes, I am having a hard time believing that it could be a ignition coil, with the overhauled mags being so young. But I will try to t/s ag ...