SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/pilot-ad-legally-enforceable

What is an FAA Airworthiness Directive (AD)?

A legally enforceable rule to correct an unsafe condition in a product.

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  1. A legally enforceable rule fixing an unsafe condition ✔
  2. An optional maintenance tip from the manufacturer
  3. A weather warning for pilots in flight

Why: ADs are legally enforceable regulations the FAA issues under 14 CFR Part 39 to correct an unsafe condition. They can apply to an aircraft, engine, propeller or appliance.

Huh, didn't know that: Some ADs are emergencies that need compliance right away; others give a set time or are repeated at intervals.

The dad joke
I asked my plane if it had any directives. It said, 'Just one: stop making me do touch and goes with you.'
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References

Answer: A legally enforceable rule fixing an unsafe condition. ADs are legally enforceable regulations the FAA issues under 14 CFR Part 39 to correct an unsafe condition. They can apply to an aircraft, engine, propeller or appliance.

  1. FAA Airworthiness Directives www.faa.gov/regulations_policies/airworthiness_directives
    legally enforceable regulations issued by the FAA in accordance with 14 CFR part 39 to correct an unsafe condition in a product
    Checked 2026-10-09.

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