Final ruleTook effect Oct. 20, 2026
Airworthiness Directives; MD Helicopters, LLC Helicopters
Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Sept. 15, 2026. Document 2026-18927. Updated Nov. 5, 2026.
- What it does
The FAA is superseding Airworthiness Directive (AD) 2024-23- 06, which applied to certain MD Helicopters, LLC Model 369, 369A, 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. AD 2024-23-06 required repetitively inspecting the torque tube assembly and roller bearings, and depending on the results, replacing parts or accomplishing additional inspections. Since the FAA issued AD 2024-23-06, the FAA has determined that additional torque tube assemblies are affected by this unsafe condition. This AD continues to require the actions of AD 2024-23-06 and expands the applicability. 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:
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
994 earlier Federal Register documents under regulation identifier 2120-AA64 since Jan. 1, 2025.
- Sept. 15, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Defence and Space GmbH Airplanes
- Sept. 15, 2026 Final rule. Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes
- Sept. 14, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
- Sept. 14, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; CFM International, S.A. Engines
- Sept. 14, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Dassault Aviation Airplanes
- Sept. 14, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Bombardier, Inc., Airplanes
- Sept. 11, 2026 Final rule. Airworthiness Directives; Dassault Aviation Airplanes
- Sept. 11, 2026 Final rule. Airworthiness Directives; Dassault Aviation Airplanes
Since then:
- Sept. 16, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
- Sept. 17, 2026 Final rule. Airworthiness Directives; Bell Textron Canada Limited Helicopters
- Sept. 17, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Sept. 17, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Sept. 17, 2026 Final rule. Airworthiness Directives; Airbus SAS Airplanes
- Sept. 17, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes
- Sept. 17, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
- Sept. 17, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Pratt & Whitney Engines
- Sept. 18, 2026 Final rule; request for comments. Airworthiness Directives; Rolls-Royce Deutschland Ltd. & Co. KG Engines
- Sept. 18, 2026 Final rule; request for comments. Airworthiness Directives; Rolls-Royce Deutschland Ltd. & Co. KG Engines
- Sept. 21, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; The Boeing Company Airplanes
- Sept. 22, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Leonardo S.p.a. Helicopters
- Sept. 22, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Bell Textron Canada Limited Helicopters
- Sept. 22, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
- Sept. 22, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
- Sept. 23, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Textron Aviation, Inc. (Type Certificate Previously Held by Cessna Aircraft Company) Airplanes
- Sept. 24, 2026 Supplemental notice of proposed rulemaking (SNPRM). Airworthiness Directives; Bombardier, Inc., Airplanes
- Sept. 28, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters
- Sept. 28, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Sept. 28, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Sept. 28, 2026 Final rule; request for comments. Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters
- Sept. 28, 2026 Final rule. Airworthiness Directives; Airbus Helicopters
- Sept. 28, 2026 Final rule; request for comments. Airworthiness Directives; Costruzioni Aeronautiche Tecnam S.P.A. Airplanes
- Sept. 28, 2026 Final rule. Airworthiness Directives; Hélicoptères Guimbal Helicopters
- Sept. 28, 2026 Final rule. Airworthiness Directives; Safran Helicopter Engines, S.A. Engines
- Sept. 29, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters
- Sept. 29, 2026 Final rule; correction. Airworthiness Directives; MD Helicopters, LLC Helicopters
- Sept. 29, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Leonardo S.p.a. Helicopters
- Sept. 29, 2026 Final rule; request for comments. Airworthiness Directives; The Boeing Company Airplanes
- Sept. 30, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
- Sept. 30, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Bell Textron Canada Limited Helicopters
- Sept. 30, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters
- Sept. 30, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Vulcanair S.p.A. Airplanes
- Sept. 30, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters
- Oct. 1, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Embraer S.A. Airplanes
- Oct. 1, 2026 Final rule. Airworthiness Directives; Airbus Helicopters
- Oct. 1, 2026 Final rule; request for comments. Airworthiness Directives; Leonardo S.p.a. Helicopters
- Oct. 1, 2026 Final rule. Airworthiness Directives; Airbus Helicopters
- Oct. 1, 2026 Final rule. Airworthiness Directives; Airbus SAS Airplanes
- Oct. 1, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Oct. 5, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; DG Aviation GmbH (Type Certificate Previously Held by DG Flugzeugbau GmbH) Gliders
- Oct. 5, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters
- Oct. 7, 2026 Supplemental notice of proposed rulemaking (SNPRM). Airworthiness Directives; Airbus SAS Airplanes
- Oct. 8, 2026 Final rule; request for comments. Airworthiness Directives; Engine Alliance Engines
- Oct. 8, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Various Helicopters
- Oct. 8, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Oct. 8, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
- Oct. 8, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
- Oct. 9, 2026 Final rule; request for comments. Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters
- Oct. 13, 2026 Final rule; request for comments. Airworthiness Directives; Elixir Aircraft
- Oct. 13, 2026 Final rule. Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines
- Oct. 13, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters
- Oct. 14, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Leonardo S.p.A. Helicopters
- Oct. 14, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Baykar Piaggio Aerospace S.p.A. (Type Certificate Previously Held by Piaggio Aviation S.p.A.) Airplanes
- Oct. 14, 2026 Proposed rule; withdrawal. Airworthiness Directives; The Boeing Company Airplanes
- Oct. 14, 2026 Final rule. Airworthiness Directives; Bombardier, Inc., Airplanes
- Oct. 14, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Leonardo S.p.a. Helicopters
- Oct. 15, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
- Oct. 15, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters
- Oct. 19, 2026 Final rule. Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines
- Oct. 19, 2026 Final rule. Airworthiness Directives; Pratt & Whitney Division Engines
- Oct. 19, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Pratt & Whitney RTX Corporation (Type Certificate Previously Held by Pratt & Whitney Division United Technologies Corporation) Engines
- Oct. 19, 2026 Final rule. Airworthiness Directives; Airbus SAS Airplanes
- Oct. 19, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Oct. 19, 2026 Final rule. Airworthiness Directives; Airbus SAS Airplanes
- Oct. 19, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Oct. 19, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Oct. 19, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
- Oct. 19, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters
- Oct. 22, 2026 Final rule. Airworthiness Directives; General Electric Company Engines
- Oct. 23, 2026 Final rule. Airworthiness Directives; MD Helicopters, LLC Helicopters
- Oct. 23, 2026 Final rule; correction. Airworthiness Directives; The Boeing Company Airplanes; Correction
- Oct. 27, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; CFM International, S.A. Engines
- Oct. 27, 2026 Final rule; request for comments. Airworthiness Directives; Airbus Helicopters
- Oct. 27, 2026 Final rule. Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters
- Oct. 27, 2026 Final rule; request for comments. Airworthiness Directives; Airbus Helicopters
- Oct. 27, 2026 Final rule. Airworthiness Directives; Airbus SAS Airplanes
- Oct. 27, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Oct. 27, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Oct. 27, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Oct. 27, 2026 Final rule. Airworthiness Directives; Ontic Engineering and Manufacturing, Inc. (Type Certificate Previously Held by Swearingen, Fairchild Aircraft, and M7 Aerospace) Airplanes
- Oct. 28, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters
- Nov. 2, 2026 Final rule; request for comments. Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-Powertrain GMBH & CO KG and Bombardier-Rotax GmbH) Engines
- Nov. 2, 2026 Final rule. Airworthiness Directives; Diamond Aircraft Industries Inc. Airplanes
- Nov. 2, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Nov. 2, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- Nov. 3, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; MD Helicopters, LLC Helicopters
- Nov. 3, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Embraer S.A. (Type Certificate Previously Held by Yaborã Indústria Aeronáutica S.A.; Embraer S.A.) Airplanes
- Nov. 3, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; The Boeing Company Airplanes
- Nov. 3, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters
- Nov. 4, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Pilatus Aircraft Ltd
- Nov. 5, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Costruzioni Aeronautiche Tecnam S.P.A. Airplanes
- Nov. 5, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
- Nov. 6, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Dassault Aviation Airplanes
- Nov. 6, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
- Nov. 9, 2026 Final rule. Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines
- Nov. 9, 2026 Final rule. Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters
- Nov. 9, 2026 Final rule. Airworthiness Directives; Airbus Helicopters
- Nov. 9, 2026 Final rule; request for comments. Airworthiness Directives; Lycoming Engines
- Nov. 9, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
- What happens next and when
This AD is effective October 20, 2026.
The agency's dates, word for word.
The record as published
| Document number | 2026-18927 |
|---|---|
| Action | Final rule. |
| Agencies | Transportation Department; Federal Aviation Administration |
| Published | Sept. 15, 2026 |
| Effective date | Oct. 20, 2026 |
| Regulation identifier (RIN) | 2120-AA64 |
| Docket | FAA-2025-3987 |
Source: the Federal Register (public domain). The document in the Federal Register