Originally Posted by
PoppaJo
I am sure our Boeing rated friends could advise us on why no engine warnings at all appeared? Strange.
According to the ATSB report (p.4):
The engine electronic control (EEC) uses the ambient air pressure data from the ADRS for engine control algorithms, engine thrust calculations and to optimise engine performance. The fan cowl static port air pressure data is only used when an EEC determines that the ADRS data is unreliable. Where no ambient pressure data is available, the EEC assigns a failsafe mode for continued engine operation.
https://www.atsb.gov.au/media/578122...-040-final.pdf