# 2026-16512: Rotax Pilots: Check Nozzles or Swap Gearboxes Now

2026-16512, Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-Powertrain GMBH & CO KG and Bombardier-Rotax GmbH) Engines and Various Aircraft, is a Federal Register rule from Transportation Department, Federal Aviation Administration published 2026-08-13, effective 2026-08-28; PRIA reads it as touching household money (as of 2026-08-20).

- Canonical: https://policyrisk.com/federal-register/2026-16512
- As of: 2026-08-20
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-16512
- Title: Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-Powertrain GMBH & CO KG and Bombardier-Rotax GmbH) Engines and Various Aircraft
- Type: Rule
- Agencies: Transportation Department; Federal Aviation Administration
- Citation: 91 FR 52236
- Published: 2026-08-13
- Effective: 2026-08-28
- Comments close: 2026-09-28
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: 2120-AA64
- Last updated: 2026-08-20

## In one line

Rotax Pilots: Check Nozzles or Swap Gearboxes Now

## Summary

The FAA is making sure certain BRP-Rotax engines used in various aircraft are safe by requiring a one-time check to see if an oil spray nozzle and screws are properly installed on the propeller gearbox. If they're missing, the gearbox must be replaced. This rule starts August 28, 2026, and helps keep pilots and passengers safe without big costs unless a replacement is needed.

## Abstract

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.

## Effects PRIA read

- Mandatory gearbox inspection and replacement: cost, medium. If your airplane has one of the listed Rotax engines, you must do a one-time visual inspection of the propeller gearbox for the oil spray nozzle and M7X16 hexagon screws by August 28, 2026. The inspection must be done before further flight for engines with less than 25 hours time-in-service (TIS) o…
- Prohibition on installing affected gearboxes: cost, low. After August 28, 2026, you may not install a propeller gearbox with serial numbers listed in the Rotax Alert Service Bulletin ASB-2026-001R00 on any engine unless it has been inspected in accordance with this AD. Replacing the propeller gearbox in accordance with the AD at or before the inspection…

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## Sources
- [2026-16512 on federalregister.gov](https://www.federalregister.gov/documents/2026/08/13/2026-16512/airworthiness-directives-brp-rotax-gmbh-and-co-kg-formerly-brp-powertrain-gmbh-and-co-kg-and)
- [2026-16512 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-08-13/pdf/2026-16512.pdf)

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Source: PRIA, https://policyrisk.com/federal-register/2026-16512 (as of 2026-08-20).