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1. 11:44 PM - Engine Stumble on Climb Out (ggtyler)
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| Subject: | Engine Stumble on Climb Out |
Just a bit of excitement in the Yak 52TW today.
Flight before last the engine did a hard stumble twice in succession on climb out.
I immediately swung back towards the field, but once I pulled back from 2400RPM
to 2100, it smoothed out. Gave it a few minutes, played with the throttle
and rpm's and it did not come back. Figured it was just a fouled plug.
I did a couple more hours of flying and starts/stops that day with no issues.
Went up again today, and on climb out, 2400 RPM, hard stumble. Then another, and
another, quickly turned back, pulled back to 2100 RPM, but the hard stumbles
proceeded to keep happening. At one point, I was pretty sure it was going to
quit running entirely. That 1.5 seconds or 2 seconds of stumbles in a row can
feel like an eternity.
It was running pretty badly, wife was in the back on her second flight ever with
me. I was pretty darn stressed, so more focused on getting back on the ground
safely than anything else. I did not think to do a mag check, but didn't really
have time, as I had only just made pattern altitude by the time I was on
downwind. I did scan through all the instruments, and all temps/pressures seemed
be normal.
On final, I must say, I just wanted us to be back on the ground NOW, and was getting
in a bit of a hurry to get down. Realizing that stress was dictating my
landing, I just kept telling myself "don't get in a hurry, hold it off, hold it
off". Not my best landing ever, but not one I need to be ashamed of. I did find
it hard to keep my legs from bouncing all over while taxing. Not often I get
that much adrenaline pumping.
Wife's a bit of a gear-head so knew everything was definitely not cool, but she
stayed calm and didn't freak out. It's nice to have someone to hug after a bit
of a scare.
Dropped a text to Vladimir Yastremski (he does my annuals). That guy always calls
me back, no matter what time of day. He's even on vacation right now. Talk
about service! Diagnostics will come later, and will update here.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=480530#480530
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