PLT108: Anti-Icing and Deicing
What code PLT108 covers, why the FAA tests it, and how to study Anti-Icing and Deicing before your checkride.
Recall aircraft anti-icing / deicing - methods / fluids
What this means for your checkride
Anti-icing prevents ice from forming; deicing removes ice that has already formed. Airframe systems include heated surfaces, pneumatic boots that break off accumulated ice, and weeping-wing fluid systems; ground deicing uses heated glycol fluids before departure, each with a holdover time.
Knowing what each system does and its limits is safety-critical in icing, so the FAA tests the methods, fluids, and the difference between preventing and removing ice.
Pilots treat boots as anti-ice. Deice boots remove ice after it accumulates; cycling them at the wrong time can let ice bridge over the boot, so they are used per the manufacturer's procedure.
Where to study it
A code on your test report is an area of deficiency. An authorized instructor must review it with you and endorse that review before you take the practical test, and the examiner may revisit it during the oral. Study it until you can explain it out loud, not just recognize the answer.