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Airworthiness Directive 2026-01-01

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Official AD 2026-01-01 · FR doc 2026-00454 · 2026-01-13 · airframe

Airworthiness Directives; Honda Aircraft Company LLC Airplanes

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain Honda Aircraft Company LLC (Honda) Model HA-420 airplanes. This AD was prompted by the discovery of a gap between the trailing edge wing nut plates and leading edge aileron balance weights being less than the minimum required clearance. This AD requires replacing the affected left and right aileron fixed balance weights with reduced geometry fixed balance weights. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2026-01-01 applies to

MakesHonda Aircraft Company
ModelsHA-420
Serial-conditional — narrows to serials 42000172–42000172, 42000235–42000265, 42000267–42000272.
Part-conditional — HJ1-15751-152-003, HJ1-15751-157-003.

Applies only to airplanes with aileron balance weight part number HJ1-15751-152-003 or HJ1-15751-157-003 installed.

Whether AD 2026-01-01 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 2026-01-01 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.