Originally Posted by
Someone Somewhere
It's in that draft FCOM without a caveat to engine manufacturer.
Perhaps it's MELable on the RR but not GE?
On the GEnx, the entire TCMA function is resident to the FADEC. It's possible to MEL dispatch with one FADEC channel inop - which effectively means only one channel of TCMA would be available. No need to have a separate MEL item.
I don't know enough about the Trent architecture to know why it needs a separate MEL item for one channel of TCMA failed.