ADIRU DOzing
I had a case of losing ADR1 inflight and no ECAM warning or warning light on Overhead panel came up whatsoever.All ADR1 instrumentation on CPT's side were lost however.Using CPT3 switching ,all this was restored but it still baffles me that no ECAM actions were shown to do this.Back home at base an Avionics Engineer (after I explained to him what happened ), told me that there was no fault whatsosver on ADR1 (after doing a diagnostics test)....what happened was that the ADR was dozing and switched itself off automatically.Any ideas why nothing is mentioned in the FCOM's?