WRG
A33Zab : thank you for this
Quote:
No doubt this is a wiring (WRG) problem, either internal in the PRIM2 or in the wiring from ADR1 ARINC BUS 1-2 from terminal to PRIM2
Don't forget to mention connector, pins & s'u'ckets!
Now this is very interesting :
Quote:
Could PRIM2 be in NORMAL LAW and others in ALTERNATE LAW, Very unlikely because ADR DISAGREE (due to PROBE PITOT 1+2,2+3,1+3) results in ALTERNATE LAW for all PRIMS.
Do you remember the timing for ADR DISAGREE in this accident sequence ? Time-stamp from CMC says 02:12 if I remember correctly. Can you tell us more about the difference between NAV ADR DISAGREE and F/CTL ADR DISAGREE ? Which system declares disagreement ?
Flight Computer Data Concentrator 2 (FCDC2) aka EFCS2 is the detector for
NAV ADR DISAGREE and declares ALT 2 LAW.
A
F/CTL ADR DISAGREE msg doesn't exist, only
NAV ADR DISAGREE.
From the report:
"The combined triggering of these monitoring processes has the following effects:
at the level of the EFCSs:
switch to alternate 2 control law,
unavailability of the rudder deflection limitation function which occurs, when applicable, ten seconds later."