rotax Airworthiness Directives

33 ADs indexed for rotax aircraft.

Recent ADs

2026-04-02

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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

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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

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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

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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

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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

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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

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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

2013-17-04

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Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engine

Unsafe Condition: Oil leaks in the intake channel in the area of the valve guide on some cylinder heads could increase oil consumption and result in engine stoppage.

Effective: Sep 24, 2013 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engine

2013-15-19

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

Unsafe Condition: Cylinder heads not manufactured to proper specification may lead to excessive oil consumption, which could result in an in-flight engine shutdown, forced landing, and damage to the airplane.

Effective: Aug 27, 2013 Category: engine Compliance: Before further flight

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

2013-07-12

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

Unsafe Condition: Certain No. 2 and No. 3 cylinder heads not manufactured to proper specification may have an oil leak in the intake channel in the area of the valve guide, potentially leading to increased oil consu...

Effective: Apr 30, 2013 Category: engine Compliance: Within 5 flight hours or 20 days after the effective date of the AD.

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

2012-16-13

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

Unsafe Condition: Failure of the pressure side fuel hose on certain fuel pumps and contamination in the carburetors connected to those fuel pumps.

Effective: Nov 6, 2012 Category: aircraft Compliance: Within 5 flight hours after the effective date of the AD.

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

Technical illustration of an aircraft fuel pump, filter, valve, and lines
Problem area Fuel system

2012-15-01

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Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engine

Unsafe Condition: Deviation in the manufacturing process of fuel hoses installed on the pressure side of part number 893114 fuel pumps, which may not be fuel resistant, could lead to detachment of particles from the...

Effective: Aug 14, 2012 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engine

Technical illustration of an aircraft fuel pump, filter, valve, and lines
Problem area Fuel system

2012-04-03

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

Unsafe Condition: During engine production, some engines may not have had the oil pump attachment bolts torqued to specification, which could lead to oil leaks and irregularities in the oil supply.

Effective: Mar 16, 2012 Category: engine Compliance: Within four flight hours or 30 days after the effective date of this AD, whichever occurs first.

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

2012-01-07

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Airworthiness Directives; BRP-POWERTRAIN GMBH & CO KG Rotax Reciprocating Engines

Unsafe Condition: Isolated manufacturing deviations reportedly found on the threads of a certain batch of fuel pressure regulators, part number (P/N) 887130, installed on Rotax 914 F series engines, which could resu...

Effective: Feb 27, 2012 Category: engine Compliance: Within 100 flight hours after the effective date of this AD

Why matched: Airworthiness Directives; BRP--POWERTRAIN GMBH & CO KG Rotax Reciprocating Engines

2012-01-01

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Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engine

Unsafe Condition: Deviation in the manufacturing process of certain part number 888164 crankshafts may cause cracks on the surface of the crankshaft on the power take off side, which could lead to failure of the cra...

Effective: Jan 26, 2012 Category: aircraft Compliance: Within 4 hours time-in-service

Why matched: Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engine

Technical illustration of an aircraft turbine engine assembly
Problem area Engine

2011-14-09

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Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engine

Unsafe Condition: Deviation in hardening of Part Number 944072 washers exceeds design specification, potentially leading to cracks in the washer, loosening of the magneto flywheel hub, and ignition failure, which co...

Effective: Jul 25, 2011 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engine

2011-12-04

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Airworthiness Directives; BRP-Powertrain GmbH & Co. KG Rotax 912 F3, 912 S2, 912 S3, 912 S4, 914 F2, 914 F3, and 914 F4 Reciprocating Engines

Unsafe Condition: Deviation in hardening of certain Part Number (P/N) 944072 washers exceeds the hardness of the design specification, affecting the magneto ring flywheel hub installation.

Effective: Jun 27, 2011 Category: aircraft Compliance: Within 10 flight hours or at next maintenance after the effective date of the AD, whichever occur...

Why matched: Airworthiness Directives; BRP-Powertrain GmbH & Co. KG Rotax 912 F3, 912 S2, 912 S3, 912 S4, 914 F2, 914 F3, and 914 F4 Reciprocating Engines

2011-11-03

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Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engine

Unsafe Condition: Deviation in hardening of certain Part Number (P/N) 944072 washers exceeds the hardness of the design specification, which could lead to cracks in the washer, loosening of the magneto flywheel hub,...

Effective: Jun 16, 2011 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engine

2010-23-17

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Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engines

Unsafe Condition: Reports of cracks in the engine crankcase.

Effective: Dec 22, 2010 Category: aircraft Compliance: Before further flight.

Why matched: Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engines

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