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EASA Regulations for Airbus Helicopters EC135

49 airworthiness directives and regulations affecting Airbus Helicopters EC135.

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New ADs and bulletins for Airbus Helicopters EC135, summarized like the ones below, every Monday.

EASA AD 2026-0188

Instruments – Warning Unit Emergency Off Switches – Operational Check

EASA Airworthiness Directive 2026-0188 is issued for Airbus Helicopters Deutschland GmbH EC135, EC635, and MBB-BK117 helicopter models. It addresses potential failures of emergency off switches in the warning units that could lead to engine shutdown or loss of fuel shut-off capability. The directive mandates operational checks and possible replacement of affected warning units to ensure continued airworthiness.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters MBB-BK 117
Airbus Helicopters EC635
MBB-BK117

EASA AD 2026-0131

Engine Fuel & Control – Electronic Engine Control Unit – Software Update; Engine Fuel & Control – Preference Injector – Non-extinguishing Test / Replacement

EASA Airworthiness Directive 2026-0131 addresses safety concerns for SAFRAN Helicopter Engines ARRIUS 2B2 engines, commonly installed on Airbus Helicopters Deutschland EC135 and EC635 models. The directive mandates software updates to the Electronic Engine Control Unit and introduces non-extinguishing tests and replacement requirements for the preference injector component. These measures aim to prevent engine flameouts caused by fuel coking and injector clogging.

Airworthiness Directive

Safran ARRIUS 2
Airbus Helicopters EC135
Airbus Helicopters EC635

EASA AD 2026-0032

Tail Rotor — Tail Rotor Blades — Inspection

EASA Airworthiness Directive 2026-0032 is an airworthiness directive addressing inspection requirements for tail rotor blade assemblies on Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It specifically targets tail rotor blade assemblies with part numbers L642A2002111 and L642A2002112 due to risks of intergranular corrosion and potential cracks. The directive mandates repetitive inspections to ensure continued airworthiness and safety.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635

EASA AD 2026-0031

Tail Rotor — Tail Rotor Blades — Inspection

EASA Airworthiness Directive 2026-0031 is issued for Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It mandates repetitive inspections of tail rotor blade assemblies with part number L642A2002121 due to risks of intergranular corrosion that may cause cracks and potential rupture. The directive applies to all variants and serial numbers of the affected helicopter models.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635

EASA AD 2026-0024

Rotors Flight Control — Ball Bearing Control System — Inspections

EASA Airworthiness Directive 2026-0024 is issued for Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models with serial numbers 0005 to 1276 inclusive. It addresses inspections of the rotors flight control ball bearing control system, specifically focusing on the yaw actuator assemblies and control rods. The directive mandates inspections to detect potential failures that could lead to loss of tail rotor control.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635

EASA AD 2025-0260

Rotors Flight Control — Ball Bearing Control System — Inspection

EASA Airworthiness Directive 2025-0260 is an airworthiness directive addressing the ball bearing control system in the rotors flight control of Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It applies to all serial numbers up to 1999 inclusive and mandates inspections of specific ball pivot and control rod parts to ensure continued airworthiness. The directive introduces inspection requirements to prevent loss of tail rotor control due to broken control rods in the yaw actuator assembly.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635

EASA AD 2022-0168R2

Rotorcraft Flight Manual — Section Emergency Procedures — Amendment; Integrated Modular Avionics — Ethernet Network — Inspection

The Rotorcraft Flight Manual — Section Emergency Procedures — Amendment; Integrated Modular Avionics — Ethernet Network — Inspection is a regulatory document applicable to AIRBUS HELICOPTERS DEUTSCHLAND models EC135, 635, and MBB-BK 117. It addresses updates to the emergency procedures section of the flight manual and introduces inspection requirements for the integrated modular avionics Ethernet network. The document aims to enhance operational safety and avionics reliability for these specific rotorcraft types.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters MBB-BK 117

EASA AD 2025-0174R1

Fuselage — Rear Structure / Rear Frame — Inspection

Fuselage — Rear Structure / Rear Frame — Inspection is a regulatory document concerning the inspection requirements for the rear structure and rear frame of AIRBUS HELICOPTERS DEUTSCHLAND EC135 and EC635 helicopter models. It provides guidance on maintaining the structural integrity of these specific helicopter fuselage components to ensure continued airworthiness and safety.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635

EASA AD 2015-0226R8

Equipment / Furnishings — Hoist — Test / Replacement

EASA Airworthiness Directive 2015-0226R8 is a regulatory document addressing the inspection, testing, and replacement requirements for Goodrich externally mounted rescue hoists installed on various helicopter models including Leonardo AW109SP, AB139, AW139, AB412; Bell Textron 212, 214, 412, 429, 430; Airbus Helicopters AS 365 N3, AS 332 L2, EC225 LP, MBB-BK117 C-2, EC135, EC635; MD Helicopters MD900; and Sikorsky S-61, S-76, and S-92A. The directive mandates load checks, cable replacements, and overload clutch replacements to ensure continued airworthiness and safety of hoist operations.

Airworthiness Directive

Airbus Helicopters SA 330
Airbus Helicopters AS 332
Airbus Helicopters EC 225
Airbus Helicopters SA
Airbus Helicopters AS 365
Airbus Helicopters EC 155
Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters MBB-BK 117
Bell 429
Bell 430
Bell Textron Inc. (Bti) 212
Bell Textron Inc. (Bti) 412
Leonardo S.P.A. Helicopters A109
Leonardo S.P.A. Helicopters A119
Leonardo S.P.A. Helicopters AB139
Leonardo S.P.A. Helicopters AW139
Leonardo S.P.A. Helicopters AB212
Leonardo S.P.A. Helicopters AB412
Md Helicopters Inc (Mdhi) MD900
Mcdermott 214 Holdings, 214
Sikorsky S-61
Sikorsky S-76
Sikorsky S-92

EASA AD 2025-0113

Superseded by EASA AD 2026-0031

EASA Airworthiness Directive 2026-0031 supersedes the previous directive concerning Airbus Helicopters Deutschland EC135 and EC635 models. This directive updates the regulatory requirements for these helicopter types to ensure continued airworthiness and safety compliance.

Airworthiness DirectiveSuperseded

Airbus Helicopters EC135
Airbus Helicopters 635

EASA AD 2025-0108

Rotors Flight Control – Ball Bearing Control System – Inspection

EASA Airworthiness Directive 2025-0108 is an interim safety directive affecting Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models with serial numbers up to 1999. It mandates a one-time inspection of specific ball bearing control system parts, including ball pivots, yaw actuator assemblies, and control rods, to address a reported loss of tail rotor control. The directive requires reporting inspection results to Airbus Helicopters Deutschland to support ongoing investigation.

Airworthiness DirectiveSuperseded

Airbus Helicopters EC135
Airbus Helicopters 635

EASA AD 2025-0051R1

Equipment / Furnishings — Hoist — Replacement

EASA Airworthiness Directive 2025-0051R1 is a regulatory update addressing the replacement of rescue hoist assemblies on various Airbus Helicopters and Leonardo helicopter models, including the H160-B, EC 225 LP, EC 175 B, AS 332 L2, AS 365 N3, EC135, MBB-BK117, AW109SP, AB139, AW139, AW169, and AW189. The directive mandates inspections and replacement of affected hoist assemblies due to potential non-conformant overload clutch assemblies that could lead to hoist failure. This AD applies to all serial numbers of the listed helicopter models and specifies affected part numbers and serviceable part criteria.

Airworthiness Directive

Airbus Helicopters EC175
Airbus Helicopters H160
Airbus Helicopters SA 330
Airbus Helicopters AS 332
Airbus Helicopters EC 225
Airbus Helicopters SA
Airbus Helicopters AS 365
Airbus Helicopters EC 155
Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters MBB-BK 117
Leonardo S.P.A. Helicopters A109
Leonardo S.P.A. Helicopters A119
Leonardo S.P.A. Helicopters AB139
Leonardo S.P.A. Helicopters AW139
Leonardo S.P.A. Helicopters AW169
Leonardo S.P.A. Helicopters AW189

EASA AD 2025-0055

Equipment / Furnishings — Rescue Hoist Cable Drum — Inspection

EASA Airworthiness Directive 2025-0055 is an airworthiness directive addressing the inspection of rescue hoist cable drums installed on Airbus Helicopters Deutschland GmbH EC135, EC635, and MBB-BK117 helicopter models. It mandates repetitive inspections of specific rescue hoist assemblies with certain part numbers to detect cracks that could compromise hoist cable operation. The directive applies to all serial numbers up to 1999 inclusive for the specified helicopter models.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters MBB-BK 117

EASA AD 2024-0249

Instruments — Warning Unit Emergency Off Switches — Operational Check

EASA Airworthiness Directive 2024-0249 is an operational check directive targeting the emergency off switches of warning units installed on Airbus Helicopters Deutschland GmbH EC135, EC635, and MBB-BK117 helicopter models. It mandates repetitive operational checks of these switches to detect mechanical failures that could lead to engine shutdown or fuel shut-off valve issues. The directive applies to all variants and serial numbers of the specified helicopter models.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters MBB-BK 117

EASA AD US-2024-20-07

Equipment / Furnishings - Emergency Float Kit Activation Handle - Repetitive Inspections / Replacement

The document titled 'Equipment / Furnishings - Emergency Float Kit Activation Handle - Repetitive Inspections / Replacement' is a regulatory directive addressing the maintenance requirements for the emergency float kit activation handle on certain aircraft. It mandates repetitive inspections and replacement procedures to ensure the proper functioning of this critical safety equipment. The directive applies to aircraft equipped with the specified emergency float kit activation handle assemblies.

Airworthiness Directive

Airbus Helicopters AS 350
Airbus Helicopters EC 130
Airbus Helicopters EC 120 B
Airbus Helicopters BO 105
Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters MBB-BK 117
Bell 206
Bell 407
Bell Textron Inc. (Bti) 210
Bell Textron Inc. (Bti) 212
Bell Textron Inc. (Bti) 412
Leonardo S.P.A. Helicopters AB212
Leonardo S.P.A. Helicopters AB412
Md Helicopters Inc (Mdhi) 369
Md Helicopters Inc (Mdhi) 500N
Robinson R44 (Raven)
Robinson R66
Sikorsky S-76

EASA AD 2024-0195R1

Engine Fuel & Control — Electronic Engine Control Unit — Software Update; Preference Injector — Non-extinguishing Test / Replacement

EASA Airworthiness Directive 2024-0195R1 addresses safety concerns related to SAFRAN Helicopter Engines ARRIUS 2B2 engines, commonly installed on Airbus Helicopters Deutschland EC135 models. The directive mandates software updates to the Electronic Engine Control Unit and introduces requirements for non-extinguishing tests and replacement of the preference injector to prevent engine flame out. This AD applies to all serial numbers of the ARRIUS 2B2 engine.

Airworthiness DirectiveSuperseded

Safran ARRIUS 2
Airbus Helicopters EC135

EASA AD 2024-0149

Time Limits / Maintenance Checks – Airworthiness Limitations Section – Amendment

EASA Airworthiness Directive 2024-0149 is issued for SAFRAN Helicopter Engines ARRIUS 2B2 engines, which are commonly installed on Airbus Helicopters Deutschland EC135 and EC635 models. This directive mandates compliance with updated airworthiness limitations and maintenance tasks as specified in the latest Airworthiness Limitations Section of the ARRIUS 2B2 Maintenance Manual. It ensures continued airworthiness by enforcing life limits and maintenance intervals for engine components.

Airworthiness DirectiveSuperseded

Safran ARRIUS 2
Airbus Helicopters EC135
Airbus Helicopters EC635

EASA AD 2024-0028R1

Superseded by EASA AD 2026-0032

The document titled SUPERSEDED BY EASA AD 2026-0032 is an airworthiness directive concerning Airbus Helicopters Deutschland models EC135 and 635. It serves as a notice that this directive has been replaced by EASA AD 2026-0032, which now governs the relevant regulatory requirements for these helicopter types.

Airworthiness DirectiveSuperseded

Airbus Helicopters EC135
Airbus Helicopters 635

EASA AD 2023-0197

Tail Rotor Drive — Flexible Couplings and Tail Rotor Shafts — Inspection

EASA Airworthiness Directive 2023-0197 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It mandates inspection of the tail rotor drive flexible couplings and tail rotor shafts due to reported occurrences of ruptured or deformed flexible couplings. The directive applies to all variants and serial numbers of the specified helicopter models.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters EC635

EASA AD 2023-0066

Equipment / Furnishings — Hoist Boom Assembly — Inspection

EASA Airworthiness Directive 2023-0066 is an airworthiness directive issued by the European Union Aviation Safety Agency concerning the inspection of hoist boom assemblies on Airbus Helicopters Deutschland GmbH EC135, EC635, and MBB-BK117 helicopter models. The directive mandates repetitive inspections of specific hoist boom assembly parts identified by part numbers 44301-500, 44307-500, and 44307-500-1 to ensure continued airworthiness and safety. It applies to all variants and serial numbers of the affected helicopter models.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters MBB-BK 117
Airbus Helicopters EC635
Airbus Helicopters MBB-BK117