Ice & Rain Control Systems
Ice & Rain Control Systems is a core knowledge area on the AMT — Airframe FAA written exam. This hub collects our 16 in-depth, ACS-aligned ice & rain control systems articles — each written in plain English and grounded in the official FAA handbooks. Work through them below, then drill the topic with practice questions.
Pneumatic Anti-Ice Boot Operation and Maintenance
Pneumatic de-ice boots use alternating inflation cycles to crack and shed ice accumulation on leading edges; proper inspection, inflation pressure, and surface condition are critical for effective operation and airworthiness.
Thermal Anti-Icing Systems: Bleed Air Wing Leading Edge
Bleed-air thermal anti-icing uses hot compressed air from the engine to continuously heat the wing leading edge, preventing ice formation rather than removing it after the fact.
Pitot Tube and Static Port Heating Systems
Pitot-static heating systems prevent ice from blocking the pitot tube and static ports, ensuring accurate airspeed, altitude, and vertical-speed indications in icing conditions — a critical airworthiness requirement for many aircraft.
Windshield Anti-Ice and Defogging Systems
Aircraft windshield anti-ice and defogging systems use electrical heating, bleed air, or chemical fluid to keep the pilot's forward visibility clear of ice, frost, and condensation in all flight conditions.
Propeller Electrothermal Deicing Systems
Electrothermal propeller deicing systems use electrically heated elements bonded to blade leading edges to shed ice in controlled cycles, keeping propellers balanced and efficient in icing conditions.
Engine Inlet Anti-Ice Inspection and Troubleshooting
Engine inlet anti-ice systems prevent ice accumulation that can block airflow and damage compressors; AMTs must know how to inspect, test, and troubleshoot both pneumatic bleed-air and electrothermal designs.
Ice Detection Systems: Types and Operational Principles
Ice detection systems alert pilots and crews to the presence of structural icing, enabling timely activation of protection systems and preventing dangerous ice accumulation on critical flight surfaces.
Chemical Fluid Anti-Ice Systems (TKS Weeping Wing)
TKS weeping wing systems prevent and remove ice by seeping a glycol-based fluid through laser-drilled titanium panels, chemically depressing the freezing point of water on critical airframe surfaces.
Rain Repellent Systems: Chemical Application and Wipers
Rain repellent systems on aircraft use chemical application and mechanical wipers to maintain pilot visibility through windshields during precipitation, each with strict operational rules and maintenance considerations covered on the AMT Airframe exam.
Pneumatic Deicing Boot Inspection, Repair, and Replacement
Pneumatic deicing boots inflate and crack ice from aircraft leading edges; AMTs must know how to inspect, repair, and replace them to keep the system airworthy and FAA-compliant.
Runback Ice Formation and Prevention Techniques
Runback ice forms when supercooled water travels beyond a heated or protected zone and refreezes on unprotected surfaces, creating dangerous aerodynamic distortions that deicing boots and heated leading edges alone cannot prevent.
Certification Requirements for Ice Protection Systems (FAR Part 25 Appendix C)
FAR Part 25 Appendix C defines the icing envelope that transport-category aircraft must be certified to fly through safely, establishing the cloud droplet and temperature conditions that drive every design choice in aircraft ice protection systems.
Windshield Wiper System Maintenance and Rigging
Aircraft windshield wiper systems remove rain from pilot visibility areas and require precise maintenance and rigging to prevent streaking, chatter, and structural damage to the windshield.
Heated Stall Warning Vane and AOA Probe Systems
Heated stall warning vanes and AOA probes are critical ice-protection devices that ensure accurate low-speed stall alerts and angle-of-attack data remain available even in icing conditions; understanding their design, heating systems, and failure modes is essential for AMT airframe certification.
Tail Surface Deicing: Horizontal Stabilizer Boot Systems
Horizontal stabilizer pneumatic deicing boot systems prevent dangerous ice accumulation on tail surfaces by cyclically inflating and cracking away ice — a critical but often misunderstood airframe system for AMT candidates.
Ground Deicing and Anti-Icing Fluid Types and Application
Ground deicing and anti-icing fluids are classified into four FAA/SAE types, each with distinct holdover times and application procedures critical to aircraft airworthiness before takeoff.
More AMT — Airframe subjects
Articles are original summaries grounded in the public-domain FAA handbooks and cite their source. ACS-aligned study aids — not a substitute for the official handbooks or regulations.