NetJets crash in Laredo TX

[Fixtur]

There's a lot of jet traffic in and out of Cabo. If it was contaminated fuel I would assume other aircraft that fueled that day would have also had issues.

 

[414driver]

it was discussed in here earlier, unusable fuel is, unusable.


That’s a fair scenario. Anyone know the avionics they are running these? Garmin is reliant on FOB sync but you can force a number you think is in there without it being accurate.

If you manually enter a fuel value and never sync it with the actual FOB, is there anything that would tell you the numbers don’t match?

Just thinking out loud here, but I could see a scenario where someone manually entered the fuel, never verified it against the actual fuel onboard, and then the briefing only covered predicted landing fuel. If nobody was really looking at the actual starting fuel, I can see how a mistake like that could snowball into a much bigger problem. Total speculation on my part, though.

If the difference between fms fuel calculation and measured fuel is greater than 400lbs you get a message on the fms for miscompare.

 

[pwttogfk]

If the difference between fms fuel calculation and measured fuel is greater than 400lbs you get a message on the fms for miscompare.

Only thing I could think of there is a MEL’d fuel gauge as the beginning of the error chain. Not sure what the 680A (and NetJets procedure) allows but the 525B MMEL allows a single gauge to be inop. Pretty strict conditions though and I think at a minimum a massive planning or unit conversion error would have to be stacked on top.

 

[hammerhat]

I haven't flown Latitude but flown a different Garmin aircraft. When you tap the FOB Sync button it resets the fuel totalizer to the actual fob. I'm not sure if it's possible to handjam the numbers but even if it is it would be odd for someone to bother with a few extra taps instead of hitting one sync button, and it was not an SOP back when I was there. If you forget to sync (which I've certainly done a few times) the endurance calcs use the previous lower numbers. There's no CAS alert about fuel gauges not matching the fuel totalizer but the reserve fuel ring paint based on the totalizer numbers, i.e. it will show lower endurance if you forget to sync.

Only thing I could think of there is a MEL’d fuel gauge as the beginning of the error chain. Not sure what the 680A (and NetJets procedure) allows but the 525B MMEL allows a single gauge to be inop. Pretty strict conditions though and I think at a minimum a massive planning or unit conversion error would have to be stacked on top.

 

[Fixtur]

Been a few years, but when I was flying into Cabo on the regular the fuellers/FBO were absolute professionals and would triple-check amounts on fuel orders. "Ey capitan, ju want top the wings and tree hundred pounds in the trunk?"

Sí, gracias.