Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Aug. 14, 2026. Document 2026-16657. Updated Nov. 7, 2026.

What it does

The FAA is superseding Airworthiness Directive (AD) 2023-21- 10, which applied to certain ATR-GIE Avions de Transport R[eacute]gional Model ATR42-500 and ATR72-212A airplanes. AD 2023-21-10 required an inspection of the horizontal stabilizer (HS) left- and right-hand leading edge lateral ribs, the box in between, the center box upper panel, and HS forward back-up fitting for discrepancies and applicable corrective action. Since the FAA issued AD 2023-21-10, it was determined that additional airplanes are affected and additional areas must be inspected. This AD continues to require the actions in AD 2023-21-10 and requires expanding the applicability and inspecting the HS front spar web and center box internal area for discrepancies and accomplishing applicable corrective actions. The FAA is issuing this AD to address the unsafe condition on these products.

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

What changed in the regulation

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

14 CFR 39

Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).

Compared with

The Federal Aviation Administration has published 482 final rules in 2026 so far, compared with 518 in all of 2025.

Counted by the Tribune from Federal Register records since Jan. 1, 2025.

Before this

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

Since then:

What happens next and when

This AD is effective September 18, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-16657
Action	Final rule.
Agencies	Transportation Department; Federal Aviation Administration
Published	Aug. 14, 2026
Effective date	Sept. 18, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2026-3878

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