Which fluids are approved for use on the Global aircraft for de-icing/anti-icing?

• A. I, II, III, and IV.
• B. I only.
• C. II, III, IV only.
• D. None.

Answer: (A)

Fluids used for de-icing and anti-icing are categorized by type, with Type I through Type IV representing different viscosities and purposes. Type I, a low-viscosity fluid, is used to remove ice and moisture from the surfaces. Types II, III, and IV are more viscous and provide longer holdover protection, making them suitable for anti-icing when the weather conditions require extended protection. For the Global aircraft, the manufacturer approves all four types for de-icing/anti-icing, as long as the procedures are followed and holdover times are observed. So the best choice reflects the full set of approved fluids. The other options would unnecessarily restrict the approved list. Always consult the aircraft’s approved fluids list and holdover-time charts in the manual when planning de-icing/anti-icing.