Aeronautical Knowledge (private Pilot)

Research Notes — § 61.105 Aeronautical Knowledge (Private Pilot)

Governing Reference — Private Pilot ACS

The Airman Certification Standards for Private Pilot — Airplane (FAA-S-ACS-6C) is the definitive reference for knowledge test and practical test evaluation. Each knowledge area in § 61.105(b) maps to ACS task codes. Available at: faa.gov — ACS

Knowledge Test Reference

The FAA Private Pilot Airplane knowledge test (PAR) has 60 questions, 2.5-hour time limit, 70% passing score. Weather-related topics and airspace regulations historically carry the most questions. FAA test prep resources: faa.gov — Knowledge Test Information

Knowledge Areas

Section 61.105(b) covers: applicable FARs, national airspace system, meteorology and meteorological services, aircraft systems and instruments, performance and limitations, weight and balance, navigation (pilotage, dead reckoning, radio navigation), radio communications, aeronautical decision-making and risk management, preflight action, and aerodynamics principles.

Regulatory Cross-References

• 14 CFR § 61.35 — knowledge test prerequisites: instructor endorsement required
• 14 CFR § 61.37 — knowledge test conduct requirements
• AC 61-65K — endorsement wording (Appendix 1, endorsement A-32)
• AIM Chapter 3 — airspace classifications cross-referenced

Source: 14 CFR § 61.105 — eCFR.gov

The PPL Knowledge Test Domains — § 61.105 Decoded

Most students treat § 61.105 like a syllabus checklist — a list of topics ground school has to cover and the FAA's question bank gets to draw from. That's not wrong, but it misses the structure. Paragraph (a) tells you how you may study (instructor-logged ground training OR a home-study course). Paragraph (b) tells you what — thirteen knowledge areas the rule names by hand. The PPL Airplane knowledge test (the FAA calls it the PAR — Private Airplane Recreational/Private) is 60 multiple-choice questions, drawn from a public question bank, and you need 70% to pass. The thirteen areas below are the bank; the PAR is the evaluation.

Two source documents the FAA expects you to have lived in by the time you sit the PAR: the Pilot's Handbook of Aeronautical Knowledge (PHAK, FAA-H-8083-25) and the Airplane Flying Handbook (AFH, FAA-H-8083-3). Both are free PDFs at faa.gov. The PHAK is the textbook for the knowledge test. The AFH is the textbook for the practical. Most of the test questions you'll miss trace back to a paragraph in one of those two books you skimmed instead of read.

What an Examiner Asks About § 61.105

61.105 itself rarely comes up by section number — DPEs ask about the knowledge areas, not the rule that lists them. But the question pattern is predictable:

• "What knowledge areas does the PPL require?" You don't need all thirteen verbatim. Group them: regs, weather, navigation/charts, performance & W&B, aerodynamics & systems, ADM, preflight planning. Hit those buckets and you've covered (b)(1) through (b)(13).
• "What's the PHAK?" The Pilot's Handbook of Aeronautical Knowledge — FAA-H-8083-25. The primary textbook for everything in 61.105(b). If you can't name it, the DPE knows you studied a test-prep app instead of the source.
• "How did you study for the PAR?" Honest answer: ground school plus a question bank app (Sheppard Air, King Schools, Sporty's). The DPE isn't grading your study method — they're checking that you can name a real path.
• "What's the passing score?" Seventy percent. 42 of 60 questions correct.
• The trick question: "Is NTSB Part 830 in the FARs?" No. The National Transportation Safety Board lives under Title 49 of the CFR — not Title 14. But 61.105(b)(2) makes it required PPL knowledge anyway. Students who memorize "FARs = everything" miss this one. Know it lives outside the FARs but inside your responsibility.

Preparing for the PPL Knowledge Test, Under § 61.105

You're three weeks from your checkride. Ground school is done. You've flown most of the practical maneuvers. The PAR is the last gate between you and scheduling the practical — here's how to walk it the right way.

Step one: take a full-length practice test cold. Don't study first. Sit down, 60 questions, 2.5 hours, the way you'll sit the real thing. Whatever score you get is your honest baseline. Most well-prepped students land somewhere in the high 70s to low 80s on a cold run.

Step two: map the misses back to § 61.105(b). Every wrong answer slots into one of the thirteen areas. Tally them. If eight of your twelve misses are weather, your weak area is (b)(6), not "the test." Spend the next week reading PHAK Chapter 12 and decoding twenty METARs/TAFs a day. If your misses cluster in W&B, work through five sample CG problems a night until the math is reflex.

Step three: rinse and repeat until you're sitting consistent 85%+ on practice tests, then schedule the PAR at a PSI testing center. Don't take the real one until you've cleared 85% on at least three different full-length practices. The 70% line is the FAA's floor, not your target. Score in the 90s and you give yourself room.

Step four — and this is the one new pilots miss — bring your knowledge-test score sheet to the practical. 14 CFR § 61.43 and the Airman Certification Standards require the DPE to review your knowledge-test report and quiz you on every area where you missed a question. If your sheet shows weak in "weather information" and you can't tell the DPE what an AIRMET Tango is, you'll bust ground before you start the airplane. Know what you missed. Re-read those PHAK chapters the night before the practical. Walk in able to explain every wrong answer.

The PAR isn't a hurdle to clear and forget. It's the FAA telling the DPE exactly where to dig.

Throttle on.