Is AD 2021-19-19 a recurring Airworthiness Directive?

No — AD 2021-19-19 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2021-19-19 apply to?

AD 2021-19-19 applies to The Boeing Company — models 737-9, 737. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2021-19-19

one-time

Official AD 2021-19-19 · FR doc 2021-23935 · 2021-11-03 · airframe

Airworthiness Directives; The Boeing Company Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-9 airplanes. This AD was prompted by a report of missing sealant on the left and right wing leading edge outboard blowout door. This AD requires doing a fluid seal contact inspection and a detailed inspection for missing sealant on each blowout door and applying sealant if necessary. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2021-19-19 applies to

MakesThe Boeing Company

Models737-9, 737

Applies only to airplanes identified in Boeing Alert Requirements Bulletin 737-57A1350 RB, dated April 23, 2020.

Whether AD 2021-19-19 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.

Date — When the work was done.

Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.

Signature & certificate — The A&P/IA who returned it to service, with certificate number.

Is AD 2021-19-19 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.