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I work for a part 135 charter operation as a line service agent. I was just fueling a 300E on an 83F day, wings level. The captain had asked for a top off, and the plane started dumping fuel out of the right wing at approximately 5100lbs. I did both SOV tests (holding the lamp test switch until the SOVs closed and the actual SOV test) with no errors.

This is the third time this has happened this year to me alone. The first was in March, the second was in June. And I'm fairly sure (I didn't record the tail numbers) that it was the (Username Protected)me plane that did it each time. I honestly think there's a MX problem with the plane, but I also think management thinks I'm incompetent and that it was a human error. Any ideas of what could have caused it so I can suggest it to them?

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fwiw, I've only seen that in my plane on very cold day (<15F) with a cold-soaked plane, and sometimes single point shows a failure in those conditions anyway. If it's happening in more normal conditions I do think you could have a shutoff sensor issue...

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Yes. This happened to me on a hot day uneven ground. Turned out there was a bad part the high level switch. Prostar fixed it.

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We have had this, and as maintenece explained the sensors going bad or sticking open somehow. Replaced and all is good. We often sto the fuel at 5k if warm and then take it up. There is a lot of settling in the fuel when it first shuts off.

uneven wings, and it happens also. Since replacing sensors, no problems. We are careful though in certain areas where they would fine / charge you.

[Username Protected]

I work for a part 135 charter operation as a line service agent. I was just fueling a 300E on an 83F day, wings level. The captain had asked for a top off, and the plane started dumping fuel out of the right wing at approximately 5100lbs. I did both SOV tests (holding the lamp test switch until the SOVs closed and the actual SOV test) with no errors.


This is the third time this has happened this year to me alone. The first was in March, the second was in June. And I'm fairly sure (I didn't record the tail numbers) that it was the (Username Protected)me plane that did it each time. I honestly think there's a MX problem with the plane, but I also think management thinks I'm incompetent and that it was a human error. Any ideas of what could have caused it so I can suggest it to them?

If the ramp is uneven, by even a few degrees this is a common occurrence once the fuel level gets above 5,000 lbs. If you are fueling any 300 and hit 5,000 lbs, slow the fueling rate or pause to let the fuel sloshing settle down. Then increase the quantity slowly if they really need to be topped. The low wing will have a tendency to vent onto the ground especially when it's warm. It is what it is. There are other jets susceptible to this as well.

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Hi (Username Protected), I've had that happen once on a warm day. Spoke to our Embraer guy and he (Username Protected)id it wasn't uncommon as you're pumping 60-65 gal. (I believe it is) per minute Single Point. The sensors believe it's full around 5200 lbs. and starts pushing fuel out the vents. When I need a top off, I ask the fueler to stop at 5000 lbs. & at a slower rate top it off to allow the sensors time to calculate what is in the tank(s). Worked for me and just a thought.

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Have had that happen before several times. What we thought was level was in fact not level. Make sure you stand well behind the airplane to make sure the plane is in fact level. Once we made sure the plane was level it did not happen any more.

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We operate two Phenom 300 and had several occasions where “she” would spit from underneath of “her” right wing. Here in Europe this usually is very expensive! Here is your solution: Leave the right fuel filler cap open while using pressure fuelling. Set the initial quantity to 2200 kg (= 4800 lbs). Then set your desired maximum amount and ask the refueler to use the lowest pump pressure and fuel flow possible. This always works.

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I di(Username Protected)gree that this is normal. I had this problem happen to me 3 times. I had maintenance look at it and I believe they replaced the NACA valve and the problem went away.

I posted on this forum temperature vs. expected fuel on board. To get the 5350 advertised by Embraer you need to be colder than -20oC. Here is a chart based on some data I took and line fitting.

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Our company has 2 Phenom 300’s, about 10 years old and so far I haven’t seen the run over problem during top offs. But I would recommend that a flight crew member always be present during fueling if possible. Many of the line guys have to be taught how to single point a Phenom 300 and the pilot needs to be there for that anyway. While Jet A is not all that flammable until it is atomized, a big puddle of it on the ramp is still a major problem and could be a di(Username Protected)ster if not caught in time and dealt with. Yes, it sounds like a mechanical problem with the shutoffs. Dumping fuel
all over the ramp was not the intent of the Embraer designers.