Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-POWERTRAIN GMBH & CO KG and Bombardier-Rotax GmbH) Engines
airworthiness · Rule · Final rule; request for comments. · Published 2026-03-04 · Effective 2026-03-19 · 91 FR 10513
Document
Document number
2026-04280
Federal Register citation
91 FR 10513
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
BRP-Rotax GmbH & Co KG (Formerly BRP-POWERTRAIN GMBH & CO KG and Bombardier-Rotax GmbH)
Publication date
2026-03-04
Effective date
2026-03-19
FAA docket
Docket No. FAA-2026-1321
Abstract
The FAA is adopting a new airworthiness directive (AD) for all BRP-Rotax GmbH & Co KG (Rotax) Model 915 iSc2 C24 and 915 iSc3 C24 engines. This AD was prompted by a report of a certain collar nut that was not installed on the propeller gearbox. This AD requires a visual inspection of the propeller gearbox to determine if a collar nut is installed on the propeller shaft and, if not installed, replacement of the propeller gearbox with a serviceable propeller gearbox. The FAA is issuing this AD to address the unsafe condition on these products.