FlyCurrentFLYCURRENT
AI.III.C.K1FAA-S-ACS-25 · Nov 2023Knowledge

Sources of weather data (e.g., National Weather Service, Flight Service) for flight pla...

ACS element text (the applicant demonstrates understanding of)

Sources of weather data (e.g., National Weather Service, Flight Service) for flight planning purposes.

Bottom line

Each pilot in command shall, before beginning a flight, become familiar with all available information concerning that flight. The FAA considers that a self-briefing may be compliant with current Federal aviation regulations.

Key numbers

Key numbers for Sources of weather data (e.g., National Weather Service, Flight Service) for flight pla...
NumberWhat it means
6 hours or more from briefing timeOutlook trigger
48 conterminous statesHIWAS coverage

FAA references

  1. 14 CFR 91.103 (Preflight action.) — eCFR current as of 2026-03-05
  2. AC 91-92, paras. 4.12, 4.16, 4.17, 4.19, 7.1, 7.2.1, 7.2.2, 7.2.3, 7.3.1, 7.4 — AC No: 91-92
  3. PHAK ch. 13 (p. 13-4) — FAA-H-8083-25C (2023)
  4. PHAK ch. 15 (p. 15-6) — FAA-H-8083-25C (2023)
Members lesson

Build understanding you can use

Unlock the full lesson and continue studying this element.

  • Full teaching sections: What it is; Key points; Rules and numbers; How it is done
  • Check your understanding with answers you can reveal
  • Common mistakes paired with the FAA facts that correct them
View membership options