Description should include the following:
- Aircraft ground de-icing and anti-icing procedures serve three purposes:
- Removal of any frozen or semi-frozen moisture from critical external surfaces of an aircraft on the ground prior to flight
- Protection of those surfaces from the effects of such contaminants for the period between treatment and becoming airborne
- Removal of any frozen or semi-frozen moisture from engine intakes and fan blades and protection of external surfaces from subsequent contamination prior to takeoff
PLT108