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CA.VI.C.K2FAA-S-ACS-7B · Nov 2023Knowledge

Situations that require deviations from flight plan or air traffic control (ATC) instru...

ACS element text (the applicant demonstrates understanding of)

Situations that require deviations from flight plan or air traffic control (ATC) instructions.

Bottom line

A pilot may deviate from an air traffic instruction in an emergency, but must advise ATC of the deviation as soon as possible.

FAA references

  1. PHAK ch. 14 (p. 14-2) — FAA-H-8083-25C (2023)
  2. AIM 5-5-2 (Air Traffic Clearance) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  3. PHAK ch. 14 (p. 14-31) — FAA-H-8083-25C (2023)
  4. RMH ch. 6 (p. 6-4) — FAA-H-8083-2A
  5. AIM 5-6-12 (Emergency Security Control of Air Traffic (ESCAT)) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  6. RMH ch. 3 (p. 3-8) — FAA-H-8083-2A
  7. AFH ch. 2 (p. 2-19) — FAA-H-8083-3C
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