GlueBall quote -
Include the SAI in your primary instrument scan during IMC!
I disagree. Never been taught to do that, never taught anyone to do that and don't see a need for it in two-crew operation. I wonder if it's even a practical idea.
Situation -- two pilots, eg Korean 747. If one of the pilots, whether handling or monitoring, sees a possible/actual problem, he should state this to the other pilot and action should be taken, subject to correct priorities being applied, to resolve the anomaly/problem.
If some wierd cultural pecking order prevents this, then such people are unfit to hold flying licences. Please don't tell me that a good dose of CRM training will cure the problem. A good dose of permanent grounding is needed.
Apply the above and your Korean 747 would still be in one piece.
End of story, regardless of maintenance shortfalls.