AA.II.C.K2FAA-S-ACS-11A · Nov 2023Knowledge

Taxi instructions/clearances, including published taxi routes.

ACS element text (the applicant demonstrates understanding of)

Taxi instructions/clearances, including published taxi routes.

Bottom line

Taxiing is the controlled movement of the airplane under its own power while on the surface. Without explicate ATC clearance, do not cross any runway hold short lines or instrument landing system (ILS) critical areas, if in use. When a pilot is uncertain of an ATC clearance, that pilot shall immediately request clarification from ATC.

FAA references

  1. AFH ch. 2 (pp. 2-18–2-19) — FAA-H-8083-3C
  2. AC 120-74, paras. 7b, 7e — AC No: 120-74B
  3. 14 CFR 91.123 (Compliance with ATC clearances and instructions.) — eCFR current as of 2026-03-05
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