Engine overtemp: Our US bureaucrats have still not figured out how or whether to let ATC personnel back into the c0ckpits, but this should not surprise anyone.
To control multiple aircraft on multiple frequencies (while we hear just one), yet not allow them to ride on just one jumpseat is not rocket science, or even RR Dart engine science.
It is good to see that some nations have not sunken to this low level of inter-departmental (stubbornness), chaos and stupidity
. This is one reason why 9/11 was made easier for the mass-murderers.