Description

Aircraft Ground De/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; and/or
• protection of those surfaces from the effects of such contaminant for the period between treatment and becoming airborne; and/or
• 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.

It should be noted that fan blade ice which may be accumulated after the pre-start visual inspection, including whilst the engines are running at low thrust prior to take off, is removed by following prescribed engine handling procedures.

First of all, the aircraft must be inspected for signs of contaminant already adhering to surfaces and where found on surfaces which must be free of contaminant, it must be removed using a suitable ground de-icing fluid.