# Airworthiness Directives; Honda Aircraft Company LLC Airplanes
> **Rule** · Final rule. · Published 2026-04-03 · Effective 2026-05-08 · 91 FR 16821
## Document
- **Document number:** 2026-06527
- **Category:** airworthiness
- **Manufacturer:** Honda
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 91 FR 16821
- **Publication date:** 2026-04-03
- **Effective date:** 2026-05-08
- **FAA docket:** Docket No. FAA-2025-0485
## Abstract

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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/04/03/2026-06527/airworthiness-directives-honda-aircraft-company-llc-airplanes)
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