o FCPC2(2CE2)/WRG:ADIRU1 BUS ADR1-2 TO FCPC2 (2 h 10)
ATA: 279334
Source: *EFCS1
Identifiers: *EFCS2
Class 2, HARD
This message indicates that FCPC 2 no longer considers as valid the information that is
delivered to it by ADR 1 (via bus 2). The ATA code beginning with 27 indicates that the fault
was not detected by any other FCPC during the three seconds that followed (otherwise this
message would have been classified ATA 34). This message has not been fully explained at
this stage of the investigation.
Faulty ADR1 data was detected only by FCPC2 (PRIM 2 ?).
Regarding correlation of messages maybe a given system reporting an external fault (class 2) probably
predicts but doesn't
command an specific class 1 message.
Which means that a class 2 message may be followed by a class 1 message giving a different diagnostic to the first message.
Once again it is important to notice that apparently only PRIM2 reported the ADR1 fault - Would it be enough to rule out ADR1 to the other PRIMS ?