What should be done if the IDG scavenge oil filter shows contamination with metal?

The identification of contamination with metal in the IDG (Integrated Drive Generator) scavenge oil filter indicates a serious issue likely related to wear or failure within the generator system. Metal particles can stem from components breaking down or from insufficient lubrication, suggesting that internal parts may be damaged or deteriorating.

Removing and replacing the IDG is the most appropriate action because it addresses not only the potential for ongoing contamination but also ensures the integrity and reliability of the generator in flight operations. If left unaddressed, the presence of metal in the filter could lead to further degradation of the system, possibly resulting in generator failure, which poses significant safety risks. Other actions like cleaning the filter or merely replacing the oil would not resolve the underlying issue and could allow continued operation with a potentially compromised IDG, thereby increasing the risk of operational failure. Inspecting the generator for damage may be a prudent step, but without replacing the IDG, it does not rectify the immediate concern of contamination.