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PLT489: Known to Unknown

What code PLT489 covers, why the FAA tests it, and how to study Known to Unknown before your checkride.

Updated September 2026 · Learning statement code · Pilot / Instructor

Official FAA learning statement

Recall teaching methods - known to unknown

What this means for your checkride

A core teaching principle is to move from the known to the unknown: build new material on what the student already understands. The instructor connects each new concept to established knowledge and sequences lessons from simple to complex and concrete to abstract, so learning has a foundation to attach to.

Sequencing from known to unknown is fundamental to effective instruction, so the FAA tests this and related organizing principles.

The common trap

Instructors introduce advanced material before the basics are solid. Without the known foundation the unknown has nothing to attach to, and the student is overwhelmed rather than building understanding.

Where to study it

FAA source
Aviation Instructor's Handbook, Organizing material, known to unknown
Read Aviation Instructor's Handbook on Aviator IQ →
Before your checkride (14 CFR 61.39)

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.