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Printed page 5. PDF page 25.
crosses on the PFDs, which were meant to be displayed if the flight control system was in alternate law or direct law. The aircraft manufacturer advised that there was no technical reason why these amber crosses would not have beenOpen official document at PDF page 25ATSB AO-2008-070: In-flight upset, VH-QPA, 7 October 2008
Printed page 12. PDF page 32.
limitation, pitch attitude protection, roll attitude protection, and high speed protection. Alternate law. The EFCS switched to alternate law if there were certain types or combinations of failures within the flight control system or related systems. Some types ofOpen official document at PDF page 32ATSB AO-2008-070: In-flight upset, VH-QPA, 7 October 2008
Printed page 26. PDF page 46.
LAW Master caution light, FCPC 3 fault indications on PFDs Reversion to Single chime alternate law 1.6.10 Central maintenance system Each electronic system that had a BITE capability sent fault information to the aircraft's central maintenance system (CMS). In addition,Open official document at PDF page 46ATSB AO-2008-070: In-flight upset, VH-QPA, 7 October 2008
Printed page 34. PDF page 54.
rest of the flight) 0445:11 0002:44 Flight control law changed from ‘normal law' to ‘alternate law' 0445:11 0002:44 Maximum nose-down elevator position +5.4° 0445:12 0002:45 Minimum vertical acceleration +0.20 g, pitch angle -3.5° 0445:13 0002:46 Maximum vertical acceleOpen official document at PDF page 54ATSB AO-2008-070: In-flight upset, VH-QPA, 7 October 2008
Printed page 47. PDF page 67.
position. Due to multiple FCPC faults, the EFCS control law reverted from normal to alternate law. The PFR also recorded class 1 maintenance fault messages associated with the two pitch faults at 0442 and 0445. Other cockpit effect messages SeveralOpen official document at PDF page 67ATSB AO-2008-070: In-flight upset, VH-QPA, 7 October 2008
Printed page 77. PDF page 97.
High AOA protection Anti pitch-up compensation Control law Normal law only Normal or alternate law Speed Mach 0.65 or more Altitude Any Any Configuration Any (must exceed threshold Landing gear retracted, flaps up Maximum authority for at least 2 secondsOpen official document at PDF page 97ATSB AO-2008-070: In-flight upset, VH-QPA, 7 October 2008