Federal Register #FAA20267235

FAA Airworthiness Directive: Inspection and Replacement for BRP-Rotax 912/914 Series Engine Gearboxes

The Federal Aviation Administration (FAA), under the Department of Transportation, has issued an airworthiness directive targeting BRP-Rotax Model 912 and 914 series engines, including certain Model 912 A series engines installed in various aircraft. - Government Buyer: - Federal Aviation Administration (FAA), Aircraft Certification Service - OEMs Mentioned: - BRP-Rotax GmbH & Co KG (formerly BRP-Powertrain GMBH & CO KG and Bombardier-Rotax GmbH) - Products/Services Requested: - One-time visual inspection of propeller gearbox for oil spray nozzle assembly and M7X16 hexagon screws - Quantity: 180 engines - Reference: Rotax Alert Service Bulletin ASB2026001R00 - Replacement of propeller gearbox if oil spray nozzle or screws are missing - Estimated replacement cost: $5,897.50 per engine - Notable Requirements: - Inspection must be performed before next flight or within 5 hours time-in-service after directive effective date - Installation of affected gearboxes is prohibited unless inspected and compliant - Addresses safety risk of engine oil loss, engine shutdown, and loss of airplane control - Affected aircraft include models from Aeromot, Diamond Aircraft Industries, HOAC-Austria, Magnaghi Aeronautica, and SCHEIBE-Flugzeugbau - Estimated inspection cost: $170 per engine

Description

The FAA is adopting a new airworthiness directive (AD) for all BRP-Rotax GmbH & Co KG Model 912 and 914 series engines and certain Model 912 A series engines included in various aircraft type designs. This AD was prompted by a report of an oil spray nozzle and certain screws not installed on the propeller gearbox. It requires a one-time visual inspection of the propeller gearbox to verify installation of these parts and, if missing, replacement with a serviceable gearbox. The AD also prohibits installation of affected gearboxes unless inspected and compliant. The directive aims to address an unsafe condition that could lead to engine oil loss, engine shutdown, and loss of airplane control.

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