Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Sept. 28, 2026. Document 2026-19757. Updated Nov. 5, 2026.

What it does

The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH (AHD) Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, EC135T3, and EC635T2+ helicopters. This AD was prompted by a determination that in cases of loss of oil from the main gearbox (MGB), the low pressure caution or warning light might not activate. This AD requires revising the existing rotorcraft flight manual (RFM) for the helicopter by incorporating updated emergency, malfunction, and normal procedures. 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

1019 earlier Federal Register documents under regulation identifier 2120-AA64 since Jan. 1, 2025.

Sept. 28, 2026 Final rule. Airworthiness Directives; Safran Helicopter Engines, S.A. Engines
Sept. 28, 2026 Final rule. Airworthiness Directives; Hélicoptères Guimbal 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; 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 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters
Sept. 24, 2026 Supplemental notice of proposed rulemaking (SNPRM). Airworthiness Directives; Bombardier, Inc., Airplanes

Since then:

What happens next and when

This AD is effective October 13, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-19757
Action	Final rule; request for comments.
Agencies	Transportation Department; Federal Aviation Administration
Published	Sept. 28, 2026
Effective date	Oct. 13, 2026
Comments close	Nov. 12, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2026-11786

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