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Spent 11 hours chasing a fuel leak on a King Air that turned out to be a 50 cent o-ring
Gotta vent. Had a King Air 200 in the hangar off and on for three days. Right engine fuel smell, no visible drips. Pressure checked the lines, swapped the fuel control, pulled the firewall shutoff valve twice, even boroscoped the boost pump. Nothing.
Finally my lead walks over, sniffs around the #2 injector line fitting and says pull it. O-ring was flat as a pancake. Fifty cent part. I had probably 11 hours of labor into this thing before we found it. Eleven hours.
What gets me is the smell was coming from the cowl flap area so I kept chasing it backward when it was the simplest fitting all along. Has anyone got a go to trick for finding these phantom fuel leaks before you burn a full day on them?
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quinnmitchell18h ago
Did you try the soap bubble test on every fitting first? A little dish soap and water in a spray bottle shows leaks in seconds, even tiny ones you cant see. Start at the injectors and work forward instead of chasing the smell backward.
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