Is AD 2018-21-13 a recurring Airworthiness Directive?

No — AD 2018-21-13 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2018-21-13 apply to?

AD 2018-21-13 applies to Honda Aircraft Company Llc — models HA-420. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-21-13

one-time

Official AD 2018-21-13 · FR doc 2018-22750 · 2018-10-23 · airframe

Airworthiness Directives; Honda Aircraft Company LLC

What this AD requires

We are superseding Airworthiness Directive (AD) 2018-11-05 for certain Honda Aircraft Company LLC (Honda) Model HA-420 airplanes. AD 2018-11-05 required incorporating a temporary revision into the airplane flight manual (AFM) and replacing the faulty power brake valve (PBV) upon condition. We issued AD 2018-11-05 as a short-term action to address the immediate need to detect and replace a faulty PBV. This AD retains the actions required in AD 2018-11-05 and requires replacing the faulty PBV with the improved part. We are issuing this AD to address the long-term corrective action and address the unsafe condition on these products.

Which aircraft AD 2018-21-13 applies to

MakesHonda Aircraft Company Llc

ModelsHA-420

Part-conditional — HJ1-13243-101-005, HJ1-13243-101-007.

Applies only to airplanes with power brake valve (PBV) P/N HJ1-13243-101-005 or HJ1-13243-101-007 installed.

Whether AD 2018-21-13 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 2018-21-13 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.