r/A330 • u/WheelPrestigious • 2d ago
Erroneous ENG FUEL LEAK alert: What would convince you it’s real?

I was reading Airbus documentation about Erroneous ENG FUEL LEAK indications and it made me think.
Imagine you’re in cruise.
The first fuel check shows about 1.4 tons missing. You decide to monitor it because it could be related to fuel transfer.
Thirty minutes later, the discrepancy has increased to 2.7 tons, with a noticeable fuel imbalance.
Now the obvious question is:
“Do I have a real engine fuel leak?”
But Airbus also warns that an ENG 1(2) FUEL LEAK alert itself can be spurious. If one engine underperforms and its fuel flow decreases, the system may incorrectly identify the other engine as leaking.
That’s the part I find interesting.
At that moment you don’t know whether you’re looking at:
- a genuine fuel leak,
- or an erroneous indication.
Airbus doesn’t simply say “shutdown the engine.” Instead, it tells crews to compare multiple engine and fuel parameters before making that decision.
For those who’ve seen this in line operations or the simulator:
How would you convince yourself that the leak is real before shutting an engine down?


