AI.II.J.K1FAA-S-ACS-25 · Nov 2023Knowledge

14 CFR parts 1, 61, and 91.

ACS element text (the applicant demonstrates understanding of)

14 CFR parts 1, 61, and 91.

Bottom line

14 CFR part 61 pertains to the certification of pilots, flight instructors, and ground instructors. Part 61 defines the eligibility, aeronautical knowledge, and flight proficiency, as well as training and testing requirements for each type of pilot certificate issued.

Key numbers

Key numbers for 14 CFR parts 1, 61, and 91.
NumberWhat it means
1 hour after sunset to 1 hour before sunriseNight (61.57)
more than 200 horsepowerHigh-perf
expires end of sixth calendar month after issuance or renewalCat II/III auth
40 hours in a part 61-certificated schoolPrivate min (61)

FAA references

  1. PHAK ch. 1 (p. 1-8) — FAA-H-8083-25C (2023)
  2. AFH chs. 11, 12 (pp. 11-1, 12-1) — FAA-H-8083-3C
  3. 14 CFR 61.21 (Duration of a Category II and a Category III pilot authorization (for other than part 121 and part 135 use).) — eCFR current as of 2026-03-05
  4. PHAK ch. 1 (p. 1-19) — FAA-H-8083-25C (2023)
  5. AFH ch. 16 (p. 16-24) — FAA-H-8083-3C
  6. 14 CFR 61.5 (Certificates and ratings issued under this part.) — eCFR current as of 2026-03-05
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