Originally Posted by
Rostermouse
No, the ‘fixed speed’ is just used to define the area of ops and the fuel planning requirements. If things all go wrong in reality, then you can fly however you need to, according to the circumstances.
ok, but based on the example I mentioned, wouldn't it make sense to use the approved OEI speed (which is also the same company speed shown in the FMC) to ensure I reach the alternate as quickly as possible, and try to remain within the 180-minute EDTO limit?
If I choose to fly at a slower speed, I might even risk exceeding the cargo fire suppression