Re broken aerial feeds it appears the AD re structural problems did not impact this a/c. Maybe it should have? I also have had a reply that the power source/ feeds for a lot of the comms. VHF HF TSPDR ACARS but not the SATCOM shared a common path. That's hard to believe but it would lead to extra workload for the crew just at the point when they were sorting out a major problem. Any initial calls would be dead & a crew trying to sort out a major emergency would not waste time on this extra minor problem. They would probably believe they had just left VHF range. It also appears the A/P uses a different source which could explain why the a/c made a turn etc.