Free AD Applicability Check

Why this matters

Airworthiness Directives (ADs) are legally enforceable FAA rules that apply to specific aircraft, engines, or components. All applicable ADs must be complied with for an aircraft to remain legally airworthy. But the FAA's Dynamic Regulatory System (DRS) makes it difficult to determine which ADs apply to a specific serial number — the system requires manual review of each AD's applicability statement.

NNumberCheck's free AD Applicability Check automates this process. Enter an N-number and we match the aircraft's serial number against every AD's applicability range, showing you:

• ●Applies — the AD applies to this aircraft based on its serial number
• ●Verify — no serial range data available; the buyer should verify applicability manually
• ●Does not apply — the serial number falls outside the AD's range