Aux Fuel tank sump valve

[gabez]

Well after 5 months of f.ing around with the plane specifically related to water contamination we found out that:

1. the aux tank sump valve wasn't the right one, meaning the pick up hole was too high

2. it wasn't at the lowest point of the tank

I had a small leak in the fuel cap and water was collecting but there was no way to sump it

we had to modify the thanks and add an additional sump valve 

 

As anybody experienced anything like it? I believe this are stock tanks as I don't see an entry in the log book 

 

this is on M231K

[Fly Boomer]

7 hours ago, gabez said:

Well after 5 months of f.ing around with the plane specifically related to water contamination we found out that:

1. the aux tank sump valve wasn't the right one, meaning the pick up hole was too high

2. it wasn't at the lowest point of the tank

I had a small leak in the fuel cap and water was collecting but there was no way to sump it

we had to modify the thanks and add an additional sump valve 

 

As anybody experienced anything like it? I believe this are stock tanks as I don't see an entry in the log book 

 

this is on M231K

Don't think the 231 had aux tanks either standard or as an option.  Probably Monroy.

[gabez]

interesting, thanks!

[LANCECASPER]

9 hours ago, gabez said:

interesting, thanks!

1. Look in your airframe logs for an installation of "Jose Monroy Long Range Fuel STC".

2. In your aircraft records there should have been a form 337 filed with the FAA when this installation was done.

3. In the back of your POH there should be some pages describing this modification, how to read the quantities in the tanks, how to sump the tanks, etc.

4. There should be a placard near your fuel gauges showing how many gallons that "Full" actually is.

[Fly Boomer]

10 hours ago, gabez said:

interesting, thanks!

Go to the FAA web site, and download all the documentation they have on your airplane, including all the 337s that were filed.  You may find something there that you don't have a hardcopy for.

[gabez]

4 hours ago, Fly Boomer said:

Go to the FAA web site, and download all the documentation they have on your airplane, including all the 337s that were filed.  You may find something there that you don't have a hardcopy for.

thank you!!

[gabez]

so found it the 337, the job was done and documented but obviously the drain valve wasn't put in the right spot

[LANCECASPER]

11 minutes ago, gabez said:

so found it the 337, the job was done and documented but obviously the drain valve wasn't put in the right spot

It's more likely that in the years since the install someone replaced it with the wrong drain valve.

Who did the original install on the 337 and when did they do it?

[gabez]

so looks like Donal D, Plantation Florida in July 1987

[LANCECASPER]

4 hours ago, gabez said:

so looks like Donal D, Plantation Florida in July 1987

Since Jose Monroy lived just down the road in in Fort Lauderdale, the installer was probably an A & P that worked for him.

I brought an airplane over in 1997 for Jose to do Long Range tanks on. One of his A & Ps, Clinton Lancaster, signed off on the 337.