Final rule · 2026-16512

Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-Powertrain GMBH & CO KG and Bombardier-Rotax GmbH) Engines and Various Aircraft

The FAA is adopting a new airworthiness directive (AD) for all BRP-Rotax GmbH & Co KG (Rotax) Model 912 F2, 912 F3, 912 F4, 912 iSc2 Sport, 912 iSc3 Sport, 912 S2, 912 S3, 912 S4, 914 F2, 914 F3, and 914 F4 engines; and Model 912 A1, 912 A2, 912 A3, and 912 A4 engines included as part of the type-certificated aircraft type design for various aircraft. This AD was prompted by a report of an oil spray nozzle and certain screws that were not installed on the propeller gearbox. This AD requires a one-time visual inspection of the propeller gearbox to determine if the oil spray nozzle and certain screws are installed and, depending on the results, replacement of the propeller gearbox with a serviceable propeller gearbox. This AD also prohibits the installation of an affected propeller gearbox on any engine unless certain conditions are met. The FAA is issuing this AD to address the unsafe condition on these products.