Question: Sullivan LH Door STC

VH-GWM

Non-Member
Hi all, a question to those of you with the Sullivan door. Currently working on a half finished conversion. The plans show a vent line installed between both tank filler necks. Has anyone got a photo of the installation? Does it fit nicely under the tank cover?

Thanks!
 
I have the door and fuel system mod. The line runs diagonally forward and inboard from the filler necks. I will try and get some pictures in a few days. What is left to do on your project? Mine was Installed by a previous owner.
 
That would be much appreciated! We've been handed a 20+ year project to finish. The fuel plumbing is yet to be completed.
 
The vent line is yellow and runs forward from the filler neck below the top of the ribs under the cover. There appears to be a notch in the cover hole reinforcement aligned with the fitting
 

Attachments

  • 8530BE6A-D8EE-4546-A636-36070723B53B.jpeg
    8530BE6A-D8EE-4546-A636-36070723B53B.jpeg
    3 MB · Views: 27
  • 4785120D-7B60-4C3A-AFF2-40522D0A6CA4.jpeg
    4785120D-7B60-4C3A-AFF2-40522D0A6CA4.jpeg
    2.9 MB · Views: 23
  • 026D296A-BE09-4A1C-8AF0-5806EA296261.jpeg
    026D296A-BE09-4A1C-8AF0-5806EA296261.jpeg
    3 MB · Views: 23
  • BB08D04F-2919-489E-9204-B9D9E1B8B2F1.jpeg
    BB08D04F-2919-489E-9204-B9D9E1B8B2F1.jpeg
    3 MB · Views: 24
A vent line between the tanks seems to me for equalizing the tank pressure. What does this have to do with the left door STC? I've had the Sullivan left door installed for years but, I don't recall anything about this vent. Unfortunately, my drawings for the door STC are ancient.
 
In order to install the door the fuel selector must be moved forward and the fuel line from the rear of the left tank must be lowered. That fuel line is lowered to the floor creating a low point so a gascolator is installed at the low point, accessible under the fuselage. A both position is added to the fuel selector and the plane can now takeoff, land and maneuver on BOTH tanks. The vent line is also added between the filler necks of the tanks. I suppose it also provides a redundant vent. Many Cessna models have a vent line between the tanks.
 
In order to install the door the fuel selector must be moved forward and the fuel line from the rear of the left tank must be lowered. That fuel line is lowered to the floor creating a low point so a gascolator is installed at the low point, accessible under the fuselage. A both position is added to the fuel selector and the plane can now takeoff, land and maneuver on BOTH tanks. The vent line is also added between the filler necks of the tanks. I suppose it also provides a redundant vent. Many Cessna models have a vent line between the tanks.

It was decades ago I installed this door. I do remember moving the fuel selector but, I know I did not have a selector with a both position. All very interesting. I now have the Trimmer fuel mod, it has a both position. He solves this problem with a pressurized fuel cap.
 
Back
Top