Airman Certification Standards
ACS IR.II.A
Aircraft Systems Related to Instrument Flight Rules (IFR) Operations
Knowledge
The general operational characteristics and limitations of applicable anti-icing and deicing systems, including airframe, propeller, intake, fuel, and pitot-static systems.
Flight control systems.
Risk Management
Operations in icing conditions.
Limitations of anti-icing and deicing systems.
Use of automated systems in instrument conditions.
Skill
Demonstrate familiarity with anti- or de-icing procedures or information published by the manufacturer specific to the aircraft used on the practical test.
Demonstrate familiarity with the automatic flight control system (AFCS) procedures or information published by the manufacturer specific to the aircraft used on the practical test, if applicable.
Retrieved from ecfr.gov on July 17, 2026.