Originally Posted by
Denti
I grew up in QFE operation while gliding. In professional operation it was always QNH, even when operating into QFE airfields in Russia (LIDO charts mention the QFE offset to QNH).
The most dangerous thing i actually experienced was a very low number of ex-Chinese A320s we got at one point in our fleet who had the QFE customer option, which meant that the Standard/QNH setting had one additional step via QFE. How many people did not click it often enough to get the correct setting was really frightening.
We had some of our A320 with that QFE option. It was latter removed to avoid this kind of issues.