Federal Register #2026-11506

FAA Airworthiness Directive: Inspection and Modification Services for Hélicoptères Guimbal Cabri G2 Helicopters

This opportunity concerns a Federal Aviation Administration (FAA) airworthiness directive for all Hélicoptères Guimbal Cabri G2 helicopters: - Government Buyer: - Federal Aviation Administration (FAA), Department of Transportation - OEM Highlight: - Hélicoptères Guimbal is the primary OEM referenced - Products/Services Requested: - Inspection of main rotor (MR) mast for cracks and corrosion pitting on 67 Cabri G2 helicopters - Modification of MR mast, including application of corrosion protection per Guimbal Service Bulletins SB 26009 B and SB 18023 E - Reporting of inspection results to the FAA - Prohibition on installation of main gear boxes (MGB) with part numbers G2110000, G2110001, G2110002, or G2110003 unless MR mast has been inspected and modified as required - Unique/Notable Requirements: - Visual inspection must use 10X magnification - Removal and repair of defective MR masts is mandatory if cracks or corrosion are found - Inspection results must be reported within 14 days - Compliance times vary by helicopter group and operational hours - Applies to 67 helicopters in the U.S. registry - No specific product procurement; focus is on inspection, modification, and compliance services for airworthiness and safety

Description

This final rule airworthiness directive (AD) applies to all Hélicoptères Guimbal Model Cabri G2 helicopters. It addresses an unsafe condition involving cracks and corrosion pitting on the main rotor (MR) mast, which could lead to failure and loss of control of the helicopter. The AD requires inspection, corrective actions, modification of the MR mast including corrosion protection, reporting inspection results, and prohibits installation of certain main gear boxes unless requirements are met. Comments on this AD are open until July 25, 2026.

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