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EASA Regulations for Airbus Helicopters EC635

28 airworthiness directives and regulations affecting Airbus Helicopters EC635.

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New ADs and bulletins for Airbus Helicopters EC635, 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 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 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

EASA AD 2022-0203

Time Limits / Maintenance Checks – Airworthiness Limitations Section – Amendment

EASA Airworthiness Directive 2022-0203 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting SAFRAN Helicopter Engines ARRIUS 2B2 engines, commonly installed on Airbus Helicopters Deutschland EC135 and EC635 helicopters. The directive mandates compliance with updated airworthiness limitations and maintenance tasks as specified in the SAFRAN ARRIUS 2B2 Maintenance Manual Chapter 05-10 Airworthiness Limitations Section Temporary Update No. 05-9.

Airworthiness DirectiveSuperseded

Safran ARRIUS 2
Airbus Helicopters EC135
Airbus Helicopters EC635

EASA AD 2022-0143

Integrated Modular Avionics – Ethernet Network – Inspection

EASA Airworthiness Directive 2022-0143 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting Airbus Helicopters Deutschland GmbH EC135, EC635, MBB-BK117, Airbus Helicopters EC 175 B, and H160-B helicopters. The directive addresses design deficiencies in the Integrated Modular Avionics Ethernet network that have caused multiple Multi-Function Display failures. It mandates inspections and corrective actions to ensure continued safe operation of these helicopter models.

Airworthiness DirectiveSuperseded

Airbus Helicopters EC175
Airbus Helicopters H160B
Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters MBB-BK 117
Airbus Helicopters EC635
MBB-BK117
Airbus Helicopters EC175 B

EASA AD 2022-0097

Equipment / Furnishings — Instrument Flight Rules Screens — Removal

EASA Airworthiness Directive 2022-0097 is an official regulatory document addressing Airbus Helicopters Deutschland GmbH EC135, EC635, and MBB-BK117 helicopter models. It mandates the removal of specific Instrument Flight Rules (IFR) screens installed on these helicopters to ensure continued airworthiness and flight safety. The directive 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
MBB-BK117

EASA AD 2022-0067

Time Limits / Maintenance Checks — Airworthiness Limitations Section — Amendment

EASA Airworthiness Directive 2022-0067 is an amendment addressing time limits and maintenance checks in the Airworthiness Limitations Section for Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It mandates compliance with updated maintenance tasks and life limits as specified in the latest Airworthiness Limitations Section documents. This directive applies to all variants and serial numbers of the EC135 and EC635 helicopters.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters EC635

EASA AD 2022-0023

Air Conditioning — Air Conditioning System — Deactivation

EASA Airworthiness Directive 2022-0023 is an airworthiness directive addressing the air conditioning system on Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It targets helicopters with specific serial numbers equipped with an affected air conditioning system soft start unit part number ES59185-2 installed on compressor/condenser pallets P/N 135-0553-1 or P/N 135-0566-2. The directive mandates deactivation of the air conditioning system to prevent electrical malfunctions.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters EC635

EASA AD 2021-0149

Equipment / Furnishings — Emergency Flashlight — Replacement

EASA Airworthiness Directive 2021-0149 is an airworthiness directive issued by the European Union Aviation Safety Agency concerning Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It addresses the replacement of emergency flashlights with part number 11359000001 due to safety concerns. The directive applies to all variants and serial numbers up to 820 inclusive of these helicopter models.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters EC635

EASA AD 2021-0066

Equipment / Furnishings — Outboard Load System Fittings — Inspection / Re-identification

EASA Airworthiness Directive 2021-0066 is an airworthiness directive addressing inspection and re-identification of outboard load system fittings on Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It applies specifically to serial numbers 0886 to 1166 inclusive, excluding certain serial numbers and helicopters with a specific service bulletin embodied. The directive mandates inspection and re-identification of affected fittings with part number L851M2810103 to ensure continued airworthiness.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters EC635

EASA AD 2021-0050

Tail Rotor — Blades — Replacement / Re-identification

EASA Airworthiness Directive 2021-0050 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It addresses the replacement and re-identification of tail rotor blades and head assemblies with specific part numbers due to a reduced life limit established for certain blades operated on higher-load Group 1 helicopters. 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 2021-0011

Equipment / Furnishings — Outboard Load System — Inspection / Modification

EASA Airworthiness Directive 2021-0011 is an airworthiness directive addressing the inspection and modification of the outboard load system on Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It specifically targets Goodrich hoists with certain part numbers and their hook assemblies to prevent potential detachment of external loads or persons during hoist operations.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters EC635

EASA AD 2018-0168R1

Tail Rotor – Blade – Re-identification / Life Limit

EASA Airworthiness Directive 2018-0168R1 is an amendment concerning Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It addresses the tail rotor blades with part numbers L642A2002101 and L642A2002111, focusing on their life limits and re-identification following changes in manufacturing processes. The directive ensures continued airworthiness by specifying service life and replacement requirements for affected tail rotor blades.

Airworthiness DirectiveSuperseded

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters EC635

EASA AD 2020-0282

Tail Rotor — Blades — Inspection

EASA Airworthiness Directive 2020-0282 is an airworthiness directive issued by the European Union Aviation Safety Agency concerning the inspection of tail rotor blades on Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. The directive applies to specific tail rotor blade part numbers and requires a one-time dimensional inspection to detect geometrical non-conformities in the blade root section. It aims to ensure continued airworthiness and prevent potential blade failure that could lead to loss of helicopter control.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters EC635

EASA AD 2020-0105

Rotors Flight Control — Main Rotor Actuator Single-Axis Actuators — Inspection / Replacement

EASA Airworthiness Directive 2020-0105 is an airworthiness directive issued by the European Union Aviation Safety Agency concerning Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It addresses inspection and replacement requirements for main rotor actuator single-axis actuators with specific part numbers to ensure continued airworthiness and flight safety. The directive applies to all variants and serial numbers of the affected helicopter models.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters EC635

EASA AD 2020-0102

Rotors Flight Control — Tail Rotor Control System — Inspection

EASA Airworthiness Directive 2020-0102 is an airworthiness directive addressing the tail rotor control system inspection for Airbus Helicopters Deutschland GmbH EC135 and EC635 models, including various subtypes up to serial number 1276. It mandates inspections of the tail rotor control system to ensure safety after hard landings and to prevent potential control failures. The directive applies to all affected EC135 and EC635 helicopters as specified.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters EC635

EASA AD 2020-0099

Tail Rotor Drive — Titanium Bolts — Identification / Replacement

EASA Airworthiness Directive 2020-0099 is an airworthiness directive addressing Airbus Helicopters Deutschland GmbH EC135 and EC635 helicopter models. It concerns the identification and replacement of certain titanium bolts (Part Number L535M3001201) used in the tail rotor drive, which may have been improperly heat treated, leading to potential hydrogen embrittlement. This directive mandates inspection and, if necessary, replacement of affected titanium bolts to ensure continued safe operation.

Airworthiness Directive

Airbus Helicopters EC135
Airbus Helicopters 635
Airbus Helicopters EC635

EASA AD 2020-0013

Fire Protection — Hand-held Fire Extinguishers — Replacement

EASA Airworthiness Directive 2020-0013 is an airworthiness directive addressing fire protection on various Airbus Helicopters, Leonardo, and WSK PZL – ŚWIDNIK helicopter models. It specifically targets the replacement of certain umlaut engineering GmbH Halon-free hand-held fire extinguishers with manufacturing defects that could render them inoperative. The affected helicopter models include AS 332, AS 365, EC 155, EC 175, EC 225, SA 330, SA 365, EC135, EC635, MBB-BK117, AB139, AB 204, AB 205, AB 212, AB 412, AS-61, AW139, AW169, AW189, and PZL W-3A series helicopters.

Airworthiness Directive