mgb_phys
Science Advisor
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Borek said:From the very beginning we were all the time told about 24 (or something) failure messages sent automatically by plane. From what was repeated - ad nauseam - by media, these messages serve just the purpose you have mentioned - they help in servicing the plane once landed. I suppose s/he referred to these messages? Or is there something new?
Airbus obviously know they fit an ACARS, but how much data they configure it to send and if they log and/or store the messages is upto the individual airline or sometimes the maintenance contractor. So the airframe maker cannot rely on the messages for accident investigation.
Rolls-Royce particularly log a huge amount of data for their engines which the airframe maker and the airline wouldn't know about and wouldn't normally have access to.
The ACARs is also used by the airline to generate ontime departure/arrival info which has led to allegations of some flight crews (not AirFrance!) being a little naughty by opening the door while still taxiing (so the ACARS logs an earlier arrival time for a late flight) or pulling fuses if they are over hours.