GarageYears,
I believe that this particular T7 DID HAVE Satcom, just not the Satcom antenna per the recent Boeing AD. Not the same thing at all.
Could be but if so then, as hamster3null noted above, what is the
Boeing 777's satellite-communication link designed to automatically transmit the status of some onboard systems to the ground
??
Which systems would these have been since it seems that the RR one is not satellite based and earlier posts claimed neither was the ACARS?
If it did have such capability and these systems need to ping the satellites (even when not transmitting any data) ala a cell phone, then why has it taken this long for anyone to notice that these satellite signals lasted for 4 extra hours after the last communication?