AA.I.E.K8FAA-S-ACS-11A · Nov 2023Knowledge

Crew communications (e.g., sterile flight deck rules, briefings).

ACS element text (the applicant demonstrates understanding of)

Crew communications (e.g., sterile flight deck rules, briefings).

Bottom line

Although briefings are primarily a captain’s responsibility, other crewmembers may add significantly to planning and should be encouraged to do so. CRM training focuses on situation awareness, communication skills, teamwork, task allocation, and decisionmaking within a comprehensive framework of standard operating procedures (SOP).

Key numbers

Key numbers for Crew communications (e.g., sterile flight deck rules, briefings).
NumberWhat it means
10,000 feet (after takeoff and prior to landing)PED notice

FAA references

  1. AC 120-51, para. 16b; Appendix 1 — AC No: 120-51E
  2. AC 120-51, para. 1 — AC No: 120-51E
  3. AC 91.21-1, paras. 8.2, 8.3.3, 9.3 — AC No: 91.21-1D
  4. AC 61-138, paras. 14.3.2.1, 14.3.2.2, 14.3.6.2 — AC No: 61-138A
  5. 14 CFR 25.819 (Lower deck service compartments (including galleys).) — eCFR current as of 2026-10-08
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