AA.VI.C.S5FAA-S-ACS-11A · Nov 2023Skills

Establish two-way communications with the proper controlling agency, use proper phraseo...

ACS element text (the applicant demonstrates understanding of)

Establish two-way communications with the proper controlling agency, use proper phraseology and comply, in a timely manner, with all ATC instructions and airspace restrictions as well as exhibit adequate knowledge of communication failure procedures.

Bottom line

ATC uses standard phraseology and require readbacks and other responses from the pilot in order to verify that clearances and instructions are understood. Pilots should ask for clarification of a clearance or instruction.

FAA references

  1. IFH ch. 10 (p. 10-3) — FAA-H-8083-15B
  2. 14 CFR 91.130 (Operations in Class C airspace.) — eCFR current as of 2026-03-05
  3. IFH ch. 2 (p. 2-4) — FAA-H-8083-15B
  4. IFH ch. 11 (p. 11-8) — FAA-H-8083-15B
  5. 14 CFR 91.185 (IFR operations: Two-way radio communications failure.) — eCFR current as of 2026-03-05
  6. AC 90-100, para. 10d — AC No: 90-100A
  7. IPH ch. 2 (p. 2-47) — FAA-H-8083-16B
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