IR.VII.A.K1FAA-S-ACS-8C · Nov 2023Knowledge

Procedures to follow in the event of lost communication during various phases of flight...

ACS element text (the applicant demonstrates understanding of)

Procedures to follow in the event of lost communication during various phases of flight, including techniques for reestablishing communications, when it is acceptable to deviate from an instrument flight rules (IFR) clearance, and when to begin an approach at the destination.

Bottom line

If the failure occurs in VFR conditions, or if VFR conditions are encountered after the failure, each pilot shall continue the flight under VFR and land as soon as practicable.

Key numbers

Key numbers for Procedures to follow in the event of lost communication during various phases of flight...
NumberWhat it means
7600 for two-way radio communication failureSquawk code

FAA references

  1. 14 CFR 91.185 (IFR operations: Two-way radio communications failure.) — eCFR current as of 2026-03-05
  2. IFH ch. 11 (p. 11-9) — FAA-H-8083-15B
  3. IPH ch. 2 (p. 2-47) — FAA-H-8083-16B
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