I remember submitting additions for operations manual in order to get a PA31 added to the AOC. Our CASA foi would not accept it as it contained leaning instructions taken form the POH/faa approved flight manual, saying to lean the mixture to 25 degrees lean of peak when cruising. He insisted on making it 100 degrees rich of peak for cruise. It sappears that CASA believe they know more than the aircraft manufacturer, and the FAA.
So now the ops manual contains instructions that differ from the POH
Is this giving clear instructions to the pilots????? Which one are they supposed to follow?
What does this do for the credibility of the ops manual, or CASA?
How would this be viewed in a court of law>
Will pilots follow an ops manual which has data that contradicts the makers instructions?.