Originally Posted by
BAengineer
Depends on the type of fire extingiushant. If it is Halon or Foam the engine needs washing or steam cleaning, if it is CO2 or Dry powder it is an engine removal.
This surprises me. I'd expect foam and especially powder to require a removal. With Halon or CO2, being almost inert gasses, I would not expect much cleaning to be needed at all.
Note that Halon does damage to the ozone layer.