Airworthiness Directives; General Electric Company Engines
Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Oct. 22, 2026. Document 2026-21590. Updated Nov. 5, 2026.
- What it does
The FAA is adopting a new airworthiness directive (AD) for certain General Electric Company (GE) Model CF34-8C1, CF34-8C5, CF34- 8C5A1, CF34-8C5A2, CF34-8C5B1, CF34-8E2, CF34-8E2A1, CF34-8E5, CF34- 8E5A1, CF34-8E5A2, CF34-8E5A2HA, CF34-8E6, and CF34-8E6A1 engines. This AD was prompted by reports of in-flight "Engine Degraded" messages from the engine indicating and crew alerting system (EICAS) due to corrosion of the variable geometry (VG) system actuator. This AD requires removing certain electronic engine control (EEC) full authority digital electronic control (FADEC) software versions from service and installing an updated EEC FADEC software that is eligible for installation. 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:
- Compared with
The Federal Aviation Administration has published 476 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
1064 earlier Federal Register documents under regulation identifier 2120-AA64 since Jan. 1, 2025.
- Oct. 19, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters
- Oct. 19, 2026 Notice of proposed rulemaking (NPRM). 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 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 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Pratt & Whitney RTX Corporation (Type Certificate Previously Held by Pratt & Whitney Division United Technologies Corporation) Engines
Since then:
- 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
- What happens next and when
This AD is effective November 27, 2026.
The agency's dates, word for word.
The record as published
| Document number | 2026-21590 |
|---|---|
| Action | Final rule. |
| Agencies | Transportation Department; Federal Aviation Administration |
| Published | Oct. 22, 2026 |
| Effective date | Nov. 27, 2026 |
| Regulation identifier (RIN) | 2120-AA64 |
| Docket | FAA-2025-3998 |
Source: the Federal Register (public domain). The document in the Federal Register