Final rule · 2026-06527

Airworthiness Directives; Honda Aircraft Company LLC Airplanes

The FAA is superseding Airworthiness Directive (AD) 2021-22-12 for certain Honda Aircraft Company LLC (Honda) Model HA-420 airplanes. AD 2021-22-12 required removing and cleaning the inner diameter of the flap control pushrod assemblies and repetitively applying corrosion inhibiting compound (CIC) to this area. Since the FAA issued AD 2021- 22-12, new flap control pushrods have been approved that are more corrosion resistant and do not require repetitive CIC applications. In addition, referenced service material has been updated to a new revision that includes redesigned replacement flap control pushrod assemblies that have been modified to prevent interference with adjacent parts. This AD retains the requirements of AD 2021-22-12 and requires replacing the flap control pushrod assemblies with improved design pushrod assemblies for all airplanes affected by AD 2021-22-12, as well as for other airplanes not affected by AD 2021-22-12. The FAA is issuing this AD to address the unsafe condition on these products.