ABOUT PINGING . .
Does anyone here KNOW how often the ACARS- system on a 777 or on this 777 pings absent a response or ( contract ) to supply engine related data?
Note that BA claims no such contract- and RR also claims no ( engine? ) data after a few minutes before transponder shut down.
I suspect that some technical types consider DATA only to be ( engine parameters and the like ) and the non technical types do NOT consider a simple ping to be DATA … or vice versa depending on background.
And about 99 percent of the media pundits don't know the difference.
So when RR says NO engine data - they **probably mean ** no engine parameters- and do not count a ping per se as DATA
The press probably thinks or defines NO DATA as being NO pings
Yes its splitting hairs or whatever- but his old engineer would consider the ping as " hello- are you there " as an address or attempt to communicate and NOT DATA as its commonly used. I would consider altitude and speed and time as general DATA and Engine parameters as " engine " data .
Lacking one ( engine ) data IMO does NOT mean NO DATA if altitude and speed are part of the transmission.
Back to my question does anyone KNOW the ping repitition rate or ( try every xx minutes or seconds and if no answer to dump data, try again in xx minutes ) ???