The Turn back -- for Real!

dmccormack

Touchdown! Greaser!
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May 11, 2007
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Lancaster County, Pennsylvania
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Display name:
Dan Mc
I flew to work this morning -- gorgeous clear, cool morning.

Weather was supposed to be good all day. Winds were shifty, but that's fine -- I land on the grass at the home airport.

Preflight good, started up fine, back taxied to 23 at 4G7 (Fairmont). Good runup, everything fine.

Took off and made right turn to head North back home. Kept the climb at 60 MPH to 2500' since it was a bit bumpy down low and the landing options are limited over downtown Fairmont.

I'd just found a nice emergency field off the left side, reached for the throttle to power back and level off -- hadn't touched it yet when suddenly power went down from 2500 RPM to 200, and the engine sounded sick -- very sick.

I glanced at oil pressure, looked for the field, then decided to do a 180 to see how far it was back to the airport. The engine was still putting out some power -- but barely.

I had the handheld set to 122.800. Announced I was returning to the field, please clear the runway (there was a C172 at the fuel pump that just started after I taxied out -- I never heard him make any calls so didn't know where he was).

I looked ahead -- plenty of altitude with this amount of power. If it died between here and there I'd make the river.

I didn't touch the throttle until I was 2 miles out. I was over 1200' AGL.

I reduced the throttle slightly and it went nearly to idle. I slipped aggressively (very aggressively) and was still pretty high. I kept the slip in until I was about 5' above the pavement, 1/3rd the way down the runway, then wheeled it on the upwind side (direct crosswind varying from 6-10 knots).

I rolled on one wheel for about 400' (I was doing about 70 when i touched down), and kept the weight on the wheel. When the lift decayed I kept the tail up. Eventually both mains were down and I held some brake. I wheelied a long way, but actually only used about 1000' of runway. the combination brake and wheel landing allowed me to use fairly heavy brake.

I needed to stop since there was no possibility of go around and the end of runway 23 at Fairmont has a nice tall road berm about 50' above the runway.

I taxied in, parked in front of the hangar, and ran it up -- lots of unburned fuel smell. I'll bet it threw a plug.

FBO owner and mechanic came out -- they'd heard me on the radio and had called 911. They called back -- everything's fine.

We pulled the cowling off. Sure enough, plug #1 on the left front cylinder was hanging out in space.

They'll repair it there and I'll bring it back home later this week.

Bottom line: Training took over. As soon as I heard the change I had my field in sight, did a turn to lose altitude. When i knew I had residual power, made for the airport, kept it high, had an out if the airport wasn't made, and slipped aggressively and wheelied when it was the only option.

Whew.

:yesnod:
 
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Good job - glad you made it OK!
 
Nice job, Dan. Glad it ended up being a non-event. Your training ensured that happened.
 
Wow!! Congrats on FLYING the Airplane all the way to stop. Glad you are ok. How's the wife? Mine probably wouldn't let me back near the plane after that!
 
You need to loose that deathtrap so you don't have to practice so hard for emergencies.
 
Congrats on keeping your head screwed on right.:smile::yesnod:...

And the plane is good for many more years of flying too.:drink:

Good job sir................

Ben.
 
Good job! Took a little fancy stick'n'rudder, but obviously your initial thought process (choosing to climb a ways due to conditions/location) is what made the biggest difference, IMHO.
 
Well, you've certainly run the gamut today! From the taming of the the tailwheel I "borrowed" this morning to the training of the pilot this evening. What a day.

Well done!:eek:
 
You jinxed yourself with that other thread!!!!

How the heck did the plug come out? was it unscrewed or actually blown out?

Kudos on not bending metal.
 
You need to loose that deathtrap so you don't have to practice so hard for emergencies.

I completely agree. You should sell it to me :yesnod:. I've got $1K with your name all over it!!! I'll even get all $1's so it looks better in a briefcase ;).

Just kidding, nice job. And I'm painfully jealous of your Chief, I want one so bad :(.
 
You jinxed yourself with that other thread!!!!

Actually, I think thinking it through and practicing such an event made my ADM much more automatic and informed.

How the heck did the plug come out? was it unscrewed or actually blown out?

Apparently this is not uncommon. The plug is out and the threads in the block are smooth. After I landed I heard from a T-Craft owner and a Cub flier of the exact same thing happening -- in Continentals.

:dunno:
 
Apparently this is not uncommon. The plug is out and the threads in the block are smooth. After I landed I heard from a T-Craft owner and a Cub flier of the exact same thing happening -- in Continentals.

:dunno:
At least you know the compression is good... :D
How do they fix that? Drill out and install a threaded insert?
 
Actually, I think thinking it through and practicing such an event made my ADM much more automatic and informed.



Apparently this is not uncommon. The plug is out and the threads in the block are smooth. After I landed I heard from a T-Craft owner and a Cub flier of the exact same thing happening -- in Continentals.

:dunno:

Were the plugs put in with a torque wrench? Perhaps someone over-tightened it at one point and severely weakened it.
 
How do they fix that? Drill out and install a threaded insert?
You can. People do it in the motorcycle world and it often fails for those people. I'm not sure if doing so is acceptable to the FAA though.

I'd want a new or (new to me) cylinder.
 
i don't think Lycoming has made a new cylinder for that engine in about 50 years.

Time for a continental...
 
You can. People do it in the motorcycle world and it often fails for those people. I'm not sure if doing so is acceptable to the FAA though.

Did that repair on a car, without removing the head, ran fine for another 50k miles. The threaded insert was glued in with a apparently pretty temperature resistant compound.
 
Helicoil inserts are suitable repair method, and -- is also a common repair.
Understand. They work. I just don't personally like them. How long had the spark plug been in that cylinder?
 
Since at least 1940. :D

Actually, all plugs replaced in 1996 (?)
I'm no A&P...and mostly just wrench on motorcycles...but don't they have to come out for the compression check? If so, the compressions haven't been checked in 14 years?
 
I'm no A&P...and mostly just wrench on motorcycles...but don't they have to come out for the compression check? If so, the compressions haven't been checked in 14 years?

Sorry - misunderstood the question.

The plugs were *replaced* in 96 (according to the logs -- that' about 120 hours engine time ago).

They've been pulled and checked, cleaned, gapped since then, and compressions checks run each annual (78/80, 79/80,77/80,79/80 IIRC)

Helicoil inserts were stuck in another plug sometime in 2000?
 
Continentals suffer from plug blow outs as well.

yea but Continental replacement parts are readily available. My comment was in response to Jesse posting that he personally would not be satisfied with a helicoil insert and would want a new cylinder.
 
yea but Continental replacement parts are readily available. My comment was in response to Jesse posting that he personally would not be satisfied with a helicoil insert and would want a new cylinder.

Yep, and IIRC there are ways to take a C-85 and put O-200 parts on it, and end up with 100 hp, which would be nice for climb on hot days...
 
yea but Continental replacement parts are readily available. My comment was in response to Jesse posting that he personally would not be satisfied with a helicoil insert and would want a new cylinder.


The contis are more popular, certainly.

But Lyc O-145 parts may be more available.... ;)
 
The small Continentals have a robust plug insert already in the head, right from the factory. The aluminum of the head wouldn't last bery long otherwise. It's screwed in and then rolled over on the inside so it won't back out. If the plug came out, it wasn't properly torqued or the threads in the insert are shot.

Lycoming puts helicoils in their heads at the factory. Easier to replace but easier to screw up, too.


Dan
 
The small Continentals have a robust plug insert already in the head, right from the factory. The aluminum of the head wouldn't last bery long otherwise. It's screwed in and then rolled over on the inside so it won't back out. If the plug came out, it wasn't properly torqued or the threads in the insert are shot.

Lycoming puts helicoils in their heads at the factory. Easier to replace but easier to screw up, too.


Dan
Interesting. Thanks for the info.
 
Hey Dan, I'm curious about your choice to wheel land and why? I'm not at all critical of it but was just wondering what was going through you mind when you did that instead of a normal 3-point attitude landing?
 
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