Originally Posted by
Flipster130
Is it possible to stop using them altogether in aviation oil?
Possible yes, but as you say the aviation world is a slow-adopter. All jet turbine oils contain 2-3% TCP (one has a slightly different phosphate of similar structure). Removing an approved additive from a formulation and replacing it with different chemistry is considered a major change and sends the formulation back for full approvals. That process takes up to ten years and millions of dollars. Once one oil is fully approved the system may allow read across on the new additive to other formulations, although that is not written into the current process.
It is probably faster and cheaper to address the fume issue with some engine design changes or a scrubbing system in the air system.