ADIRU1 BUS ADR1-2 TO FCPC2 yes ADIRU1 BUS ADR1+2 TO FCPC2 makes more sense...
The thing is, I don't know the databus layout... ADR 1+2 Failure I think would occur if PRIM1 or none of the PRIMs receive the data... unless PRIM2 was the Master Prim at the time...
The "-" instead of the "+" could have just been a typo...
- or +
This reasonably
cannot be a typo, I have it as a scan of a computer-generated document. How did you go about translating the message into plain English ?