A pilot at the FBO said he never trusts a plane's fuel gauge until he's flown it twice

I was grabbing coffee at the airport diner yesterday and overheard a pilot telling his copilot that line. It stuck with me because it's not about the gauge itself, but the system behind it. He said on a new-to-him Citation, the gauge read full but the totalizer showed a 50-gallon discrepancy after the first leg. That means a sensor, the wiring, or the computer was giving bad data from day one. It made me think how often we sign off on a system as 'ops check good' after a single test cycle. Maybe we need to build in a verification step, like comparing computer data to a physical dipstick over a couple of flights. How do you guys handle building confidence in a new installation or repair before the customer takes it?

4 comments

4 Comments

wade8715d ago

Wait, the gauge said full but it was actually 50 gallons short? That's not a small glitch, that's a huge error right out of the gate. How does something that broken even get signed off? It makes you wonder what else was missed if they didn't catch a fuel system lying that badly.

michael6695d ago

Always cross-check with a manual measurement after the first flight.

lewis.terry5d ago

Honestly, that sounds like extra work for no reason. The whole point of the tech is to trust the reading, michael669.

jakejones5d ago

Yeah, wade871 has a point about how that gets missed. A buddy had a similar thing with a new fuel flow transducer. The computer said it was fine on the ground, but in the air the numbers went wild after about twenty minutes. Turns out the mounting bracket was a hair too tight and the vibration was messing with it.