The International Cessna^® 170 Association

During an oil change noticed what appears to be oil seeping from the oil pan just in front of the carb. Wondering if someone has another oil pan or where would be a good place for repair?

See this thread for answers. You might have it welded with mixed result. You might have it repaired with a coating but not after it's been welded. Or you may not find anyone who will repair it. The lack of viable sumps will likely bring the Continental powered fleet to a stand still at some point.
http://www.cessna170.org/forums/viewtop ... ump+repair

Maybe we should look for someone to make a stamped steel pan. With new technology there might be even a better way.

John

Of course there is a better way. Or at least as good as these are now 50 something years old. But the market is not big enough for anyone to recover there investment in th cost of certification. Again regulation kills aviation.

I wonder if Tom pursued this any further, likely not though given what Bruce said earlier. Interesting read if nothing else.

http://cessna170.org/forums/viewtopic.php?f=24&t=11608

n3833v wrote:Maybe we should look for someone to make a stamped steel pan. With new technology there might be even a better way.

John

I would love to see a design for a stamped steel pan, and how they would handle mounting the carburetor, intake manifolds, and accessory case...

not my area of expertise, but this seems to be an easy deal for someone with a CNC machining setup.

I have a sump for sale. contact me -> nc19143(at)comcast.net.

Jason wrote:I wonder if Tom pursued this any further, likely not though given what Bruce said earlier. Interesting read if nothing else.

http://cessna170.org/forums/viewtopic.php?f=24&t=11608

I posted that on every 170/aircraft page I could fine, nary a response, no market, no sumps.

Bruce Fenstermacher wrote:Of course there is a better way. Or at least as good as these are now 50 something years old. But the market is not big enough for anyone to recover there investment in th cost of certification. Again regulation kills aviation.

When I hand you a exact duplicate of a 0-300 sump. you have your A&P install it. who declares airworthiness? Isn't that a owner supplied part?

Skydynamics has replaced the aluminum Lycoming sump with one made of magnesium. I think the aerobatic community has deeper pockets than average C-170 pilot. Probably little chance of getting corrosion in an aerobatic sump as the oil/water is "stirred" well during flight.

T. C. Downey wrote:

Bruce Fenstermacher wrote:Of course there is a better way. Or at least as good as these are now 50 something years old. But the market is not big enough for anyone to recover there investment in th cost of certification. Again regulation kills aviation.

When I hand you a exact duplicate of a 0-300 sump. you have your A&P install it. who declares airworthiness? Isn't that a owner supplied part?

I agree Tom, the owner operator determines airworthiness of the part. However the mechanic must agree to install it and the IA must agree it is a legally manufactured and installed part year after year. It is often the mechanic and or IA that is the problem as they are more afraid of enforcement action and more to lose if it occurs.

If you were to do this, which one do you produce, the 3 hole or the 5 hole sump.

Make them out of carbon fiber, probably stronger and no corrosion worries.

I don't know much about the process/material but how about 3D laser printing?