EASA Regulations for Safran ARRIEL 1

8 airworthiness directives and regulations affecting Safran ARRIEL 1.

EASA SIB 2025-10

Arriel 1 Engines — Module 03 — TU377 Modification Implementation

EASA Safety Information Bulletin 2025-10 is an airworthiness bulletin addressing Safran Helicopter Engines Arriel 1B, 1D, and 1D1 engines equipped with module 03 (M03) installed on helicopters such as the Airbus Helicopters EC 130 and AS 350. The bulletin highlights the TU377 modification to prevent uncommanded in-flight shutdowns caused by rubbing between the centrifugal impeller and injection manifold. It provides a list of affected M03 serial numbers that still require retrofit.

Dec 8, 2025

Safety Information BulletinMaintenanceSafety MgmtSafran ARRIEL 1

EASA AD 2024-0207R1-CN

CANCELLED: Engine — Gas Generator First Stage High Pressure Turbine Blades — Replacement

EASA Airworthiness Directive Cancellation Notice 2024-0207R1-CN cancels the previous directive concerning the replacement of first stage high pressure turbine blades on SAFRAN Helicopter Engines ARRIEL 1 series engines. These engines are installed on various helicopter models including Airbus Helicopters AS 350, AS 365, MBB-BK117, Leonardo A109K2, and Sikorsky S-76A. The cancellation reflects updated findings regarding the safety and service life of the affected turbine blades.

Mar 10, 2025

Airworthiness DirectiveMaintenanceSafety MgmtSafran ARRIEL 1

EASA AD 2023-0110

Fire Protection — Fire Detectors — Replacement

EASA Airworthiness Directive 2023-0110 is issued to address fire detector replacement on SAFRAN Helicopter Engines ARRIEL 1 series engines installed on helicopters such as Airbus Helicopters SA 365 variants and Leonardo Helicopters A109K2. The directive mandates replacement of specific fire detectors identified by part and serial numbers due to manufacturing non-compliance causing spurious engine fire warnings. This AD applies to all serial numbers of ARRIEL 1C, 1C1, 1C2, 1K, and 1K1 engines.

May 26, 2023

Airworthiness DirectiveMaintenanceSafety MgmtSafran ARRIEL 1Airbus Helicopters SA 365Leonardo Helicopters A109K2

EASA AD 2022-0256

SUPERSEDED BY EASA AD 2023-0110

EASA Airworthiness Directive 2022-0256 is an airworthiness directive issued by the European Union Aviation Safety Agency concerning SAFRAN Helicopter Engines ARRIEL 1C, 1C1, and 1C2 engines installed on various Airbus Helicopters models including SA 365 C3, SA 365 N, SA 365 N1, and AS 365 N2. The directive addresses a manufacturing non-compliance in certain fire detectors that may cause spurious engine fire warnings. It mandates the replacement of affected fire detectors to ensure continued safe operation.

Dec 19, 2022

Airworthiness DirectiveMaintenanceSafety MgmtSafran ARRIEL 1Airbus Helicopters SA 365 C3Airbus Helicopters SA 365 NAirbus Helicopters SA 365 N1Airbus Helicopters AS 365 N2

EASA AD 2020-0151-E

Engine — Module 03 / Stage 2 High Pressure Turbine Disc — Replacement

EASA Airworthiness Directive 2020-0151-E is an emergency directive addressing the replacement of Stage 2 High Pressure Turbine discs in SAFRAN Helicopter Engines ARRIEL 1B, 1C, 1C2, and 1D1 models. These engines are commonly installed on Airbus Helicopters AS 350 B series, AS 365, and SA 365 helicopters, excluding the AS 365 N3 model. The directive targets specific turbine discs with part number 0292250400 and certain serial numbers that have been identified as potentially defective.

Jul 9, 2020

Airworthiness DirectiveMaintenanceSafety MgmtSafran ARRIEL 1Airbus Helicopters AS 350 BAirbus Helicopters AS 365Airbus Helicopters SA 365

EASA AD 2017-0064R2

Engine Fuel & Control — Drain Valve Assembly — Inspection / Replacement

{ "summary": "EASA Airworthiness Directive 2017-0064R2 is an updated safety directive addressing fuel leaks from the drain valve assembly on SAFRAN Helicopter Engines ARRIEL 1 series engines, which are installed on various helicopter models including Airbus Helicopters AS 350 and AS 365 series, MBB-BK117, Leonardo A 109 K2, and Sikorsky S-76A. The directive mandates inspections, wrapping, and replacement of affected drain valves to prevent fuel leaks that could lead to engine fire or in-flight

Apr 19, 2018

Airworthiness DirectiveMaintenanceSafety MgmtSafran ARRIEL 1Safran Helicopter Engines ARRIEL 1Airbus Helicopters AS 350Airbus Helicopters AS 365MBB-BK117Leonardo A 109 K2Sikorsky S-76A

EASA AD 2007-0045-CN

CANCELLED: Engines Formerly Used by Non-Civil Operators — Civil Use

EASA Airworthiness Directive Cancellation Notice 2007-0045-CN cancels the previous directive EASA AD 2007-0045 concerning ARRIEL 1 series engines formerly used by non-civil operators such as military users. These engines are installed on helicopters including Airbus Helicopters AS 350, AS 365, SA 365, MBB BK-117, Leonardo A109, and Sikorsky S-76. The cancellation reflects a change in regulatory approach regarding the airworthiness of these engines for civil use.

Jan 24, 2018

Airworthiness DirectiveMaintenanceSafety MgmtSafran ARRIEL 1Airbus Helicopters AS 350Airbus Helicopters AS 365Airbus Helicopters SA 365MBB BK-117Leonardo A109Sikorsky S-76

EASA AD 2018-0003

Time Limits / Maintenance Checks — Airworthiness Limitation Section — Amendment / Implementation

EASA Airworthiness Directive 2018-0003 is an amendment concerning the ARRIEL 1E2 engines, commonly installed on Airbus Helicopters Deutschland MBB-BK117-C1 and MBB-BK117-C2 helicopters. This directive mandates the implementation of updated airworthiness limitations and maintenance tasks as specified in the ARRIEL 1E2 maintenance manual Section 05-10. It ensures continued airworthiness by enforcing life limits and maintenance intervals for critical engine components.

Jan 5, 2018

Airworthiness DirectiveMaintenanceSafety MgmtSafran ARRIEL 1Airbus Helicopters MBB-BK117-C1Airbus Helicopters MBB-BK117-C2