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Flight rulesQuestion 80 of 934

When may a pilot deviate from an ATC clearance without an amended clearance?

  1. When the pilot thinks the route is too long
  2. When the weather is VFR
  3. When the aircraft is below 3,000 feet AGL
  4. When an emergency exists
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Correct answer: When an emergency exists

A pilot may deviate if an amended clearance is obtained, an emergency exists, or a TCAS resolution advisory is received.

Source: 14 CFR Part 91, § 91.123 Compliance with ATC clearances and instructions.

Practice flight rules

Questions last reviewed: 18 October 2026