Originally Posted by
tdracer
Uncontrollable High Thrust (UHT) on the ground. UHT is nothing new - although uncommon (probability of occurance is somewhere between 1/10 million and 1/100 million flight hours), all turbine engine have failures that can cause the fuel metering valve to go wide open uncommanded. FADEC has made it less likely, but the potential failure is still there.
UHT was always assumed to be something the flight crew could address by shutting down the affected engine
There is also this more recent incident from 2010
https://www.cad.gov.hk/reports/AB-01-2010e.pdf
where small hard particles contaminating the fuel jammed the fuel metering valve at 74% N1 on a Cathay Pacific A330-300 while in flight. The engine only stopped when shut down on the ground.
It's definitely not impossible even today.