So here are 3 simple questions:
1 What system & antenna aboard MH370 continued to send the pings?
2 What system & antenna aboard MH370 sent the R-R data engine monitoring data?
3 When did these two data streams cease?
Answers:
1. The onboard SATCOM terminal
2. ACARS via one of the VHF transmitters.
3. The Rolls Royce data engine monitoring transmissions ceased when ACARS was disabled.
The SATCOM pings ceased at 08.11 with a partial 'handshake' shortly after.