To try to simplify matters, can someone check that I have this right.
1. Everyone is concerned that if AD-ENG-4 is repealed, no-one will be able to run engines on condition anymore.
2. AOPA wants all Oz-specific ADs repealed and FAA and manufacturers' recommendations used instead.
3. AOPA contends that AD-ENG-4 isn't needed anymore because the ability to run on condition is enshrined in CAR42B, which takes precedence over AD-ENG-4.
Have I got that straight?
Walrus