Originally Posted by
peekay4
Thanks Youngbuck.
I looked through the mandatory parameters however (as one would expect) virtually all of them seem to be parameters suitable for accident reconstruction -- things like speed, altitude, control yolk position, ice detection -- but not necessarily useful for maintenance actions?
I imagine there's much more engineering-type data available from the QAR? I can't find a comprehensive list of QAR parameters for (say) an A320 or B737.
Question re: ACARS, for something like engine monitoring. Does the system regularly transmit engine health parameters (even when there's nothing wrong) -- or will ACARS messages get generated only when anomalies are detected / certain thresholds exceeded?
Thanks for your help.
For maintenance actions, interpretation is still required. For example on an airbus (if configured) : the aircraft has a ecam caution in flight, this will transmit via acars to a Maintrol dept or similar and from there they can arrange potential spares with AOG desk (simplified scenario)
With regards to engine parameters these are regularly transmitted and require analysis by a power plant dept or engine provider on a program such as aerobytes.
Often we get a request from the people who trend monitor to perform a maintenance action because they notice a negative shift in parameters.
EGT shift for example can lead to a compressor wash being requested.