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2026-04-02

final rule

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

Unsafe Condition: an occurrence was reported of the M40 x 1.5 collar nut that had not been installed on the propeller gearbox of a recently manufactured engine, which could result in the propeller shaft being pulled...

Effective: Mar 19, 2026 Category: propeller Compliance: Before further flight

Why matched: Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-POWERTRAIN GMBH & CO KG and Bombardier-Rotax GmbH) Engines

Technical illustration of an aircraft propeller assembly
Problem area Propeller

2025-15-03 Recurring

final rule

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

Unsafe Condition: Deviations during the manufacturing process that caused incorrect application of a certain thread-locker to certain sprag clutch housing and oil spray nozzles, which could cause blockage of the oil...

Effective: Aug 6, 2025 Category: engine Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-POWERTRAIN GMBH & CO KG and Bombardier-Rotax GmbH) Engines

Technical illustration of an aircraft electrical generator and wiring assembly
Problem area Electrical system

2025-07-02 Recurring

final rule

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

Unsafe Condition: Deviations during the manufacturing process of certain sprag clutch housing and oil spray nozzles caused incorrect application of a certain thread-locker, potentially leading to blockage of the oil...

Effective: Apr 21, 2025 Category: engine Compliance: Within 25 flight hours or within 12 months after the effective date of this AD, whichever occurs ...

Why matched: Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-POWERTRAIN GMBH & CO KG and Bombardier-Rotax GmbH) Engines

Technical illustration of an aircraft electrical generator and wiring assembly
Problem area Electrical system

2023-17-13 Recurring

final rule

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

Unsafe Condition: Surface abnormalities on the propeller shaft, caused by a deviation in the machining process, could lead to increased wear of the propeller shaft bearings, which could result in failure of the prop...

Effective: Sep 20, 2023 Category: propeller Compliance: Within 50 flight hours after the effective date of this AD.

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

Technical illustration of an aircraft propeller assembly
Problem area Propeller

2019-21-12

final rule

Airworthiness Directives; BRP-Rotax GmbH & Co KG Engines

Unsafe Condition: A broken exhaust valve has been reported on a non-certified Rotax 914 UL2-01 engine. Subsequent investigation identified deviation in the manufacturing process of the affected exhaust valve. This c...

Effective: Nov 19, 2019 Category: engine Compliance: Within 10 flight hours or 3 months after the effective date of this AD, whichever occurs first.

Why matched: Airworthiness Directives; BRP-Rotax GmbH & Co KG Engines

2019-10-04

final rule

Airworthiness Directives; BRP-Rotax GmbH & Co KG Engines

Unsafe Condition: Power loss and engine RPM drop on certain Rotax 912 and 914 model engines due to a quality control deficiency in the manufacturing process of certain valve push-rod assemblies resulting in partial ...

Effective: Jul 10, 2019 Category: engine Compliance: Before further flight

Why matched: Airworthiness Directives; BRP-Rotax GmbH & Co KG Engines

2018-03-05

final rule

Airworthiness Directives; Various Aircraft Equipped With BRP-Rotax GmbH & Co KG 912 A Series Engine

Unsafe Condition: Power loss and engine RPM drop have been reported on Rotax 912/914 engines in service. It has been determined that, due to a quality control deficiency in the manufacturing process of certain valve...

Effective: Mar 20, 2018 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; Various Aircraft Equipped With BRP- Rotax GmbH & Co KG 912 A Series Engine

2016-23-04

final rule

Airworthiness Directives; BRP-Powertrain GmbH & Co KG Reciprocating Engines

Unsafe Condition: Partial separation of the float outer skin may occur during engine operations, leading to restricted jets in the carburetor and potentially reducing or blocking the fuel supply to the affected cyli...

Effective: Dec 7, 2016 Category: engine Compliance: Within 25 flight hours or 30 days after the effective date of this AD.

Why matched: Airworthiness Directives; BRP-Powertrain GmbH & Co KG Reciprocating Engines