Which twins give you a bath if you re-fuel tanks out of order?

Tscottme

Pre-Flight
Joined
Jul 18, 2022
Messages
32
Display Name

Display name:
Scott M.
I was a line service tech at a couple of FBOs back in college decades ago. I'm semi-retired and am now working at another FBO after 30 years. I vaguely remember a couple of aircraft models that if you tried to re-fuel their tanks in the wrong order you would have fuel pouring out of a filler port. I think one of those aircraft was a Cheyenne. Is that right? and MAYBE one model of a King Air?

What I mean is if you filled the outboard wing tank, and then tried to fuel a nacelle tank that was interconnected, once you opened the nacelle filler port fuel from the wing tank gravity fed into the nacelle and came spilling out of the nacelle opening. The only other gotcha I remember was the LearJets and their fuel imbalance issues, which we almost always solved by fueling both sides at the same time.

Does anyone know of piston or turbo-prop twins that fit this description? I did save myself a face full of Jet-A by remembering to depressurize the tip tanks on a Mitsubishi MU-2. What, if any, are aircraft with fueling gotchas you know about? Thanks for any help. The other line techs are college students, mostly and most of our business are based aircraft so there is A LOT LESS variety of aircraft than at the FBOs I worked in college. As of now I ask the pilots before fueling and 99% of the aircraft and pilots are "fuel it however you like".
 
When I had my twin the only splash back I got when filling the tanks was from my credit card.
 
I learned that when fueling to put the nozzle in at an angle. Didn't matter if it was a single or twin. Pointing the nozzle straight down was a recipe for a gas bath.
 
Fueling a Falcon 20 over wing will surprise a line guy if they do not know the tanks are pressurized, around 3.5 psi if I remember right.

"DASSAULT FALCON 20 Over Wing Refueling WARNING: All Falcon fuel tanks are pressurized. Gravity tanks (overwing) are depressurized by pulling the cap tab up. DO NOT TWIST THE TAB. After waiting until there is no air escaping, slowly and carefully twist the cap tab and remove the cap." Microsoft Word - Falcon 20 Fueling.doc (nata.aero)

I understand a Citation Bravo will give the line guy a good bath when a main strut settles down while fueling. I have very little time in a KA90 but I believe you should fuel the nacelle tank before fueling the wing to avoid a bath.
 
Back
Top