Does anyone have any idea what affects the decision to use one-step or two-step de-icing?
Am currently engaged in a discussion with a colleague who says that when crew arrive at the a/c and discover clear ice contamination on the wing, we can engage in a process of THREE STEP de-icing..
Stage one - Removal of ice (clean wing concept)
Stage two - Application of de-icing fluid
Stage three - Application of anti-icing fluid
It seems to me that stage three in this process is superflous as when you remove the ice everything above it goes too..
Or does this refer to the localised removal of ice? Would seem a bit silly/unsafe not to assume that if ice is present anywhere on the a/c then it COULD be present anywhere?
Sorry if this sounds confused - would appreciate some help!
8846