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PoliticsFederal rulesFederal Aviation Administration
Proposed rule

Airworthiness Directives; Columbia Helicopters, Inc. and Restricted Category Model CH-47D Helicopters

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register April 14, 2026. Document 2026-07218. Updated Nov. 12, 2026.

What it does

The FAA proposes to adopt a new airworthiness directive (AD) for all Columbia Helicopters, Inc. Model 234 helicopters and all Restricted Category Model CH-47D helicopters. This proposed AD was prompted by reports of corrosion detected on certain flight control rigid connecting links (connecting link). This proposed AD would require repetitive borescope inspections of the connecting links for corrosion and, depending on the results of the inspection, repair of the corrosion or replacement of the connecting link with a serviceable part. This proposed AD would also require reporting the results of these inspections and would prohibit installing a certain part-numbered connecting link or a connecting link with an unknown part number on a helicopter unless certain requirements are met. The FAA is proposing this AD to address the unsafe condition on these products.

The Federal Aviation Administration's summary, as published in the Federal Register.

What it would change

1 part of Title 14 of the Code of Federal Regulations:

14 CFR 39

Before this

743 earlier Federal Register documents under regulation identifier 2120-AA64 since Jan. 1, 2025.

Since then:

What happens next and when

The FAA must receive comments on this proposed AD by May 29, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number2026-07218
ActionNotice of proposed rulemaking (NPRM).
AgenciesTransportation Department; Federal Aviation Administration
PublishedApril 14, 2026
Comments closeMay 29, 2026
Regulation identifier (RIN)2120-AA64
DocketFAA-2026-3483

Source: the Federal Register (public domain). The document in the Federal Register