Originally Posted by
augustusjeremy
From the plots in the qantas preliminary report
http://www.atsb.gov.au/publications/...070_prelim.pdf
a) IR1 fault is detected but the A/C continues in normal law even after master PRIM becomes PRIM2;
b) When master PRIM is switched back to PRIM1 then the a/c gets into Alternate Law and the crew regains control.
yes and the IR1 fault was 10 sec. before the ADR1 failure for Qantas, the two faults maybe within the same minute for the AF447. why this IR1 is declared faulty whereas it is its ADR part which is providing erroneous AoA measurements ? where there identified problems with the gyrometers/accelerometers afterward ? It does not appear so.
Jeff