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EASA Regulations for Airbus Helicopters MBB-BK 117

63 airworthiness directives and regulations affecting Airbus Helicopters MBB-BK 117.

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New ADs and bulletins for Airbus Helicopters MBB-BK 117, summarized like the ones below, every Monday.

EASA PAD 26-121

Equipment / Furnishings – System Interface Unit – Replacement

EASA Airworthiness Directive Proposal 26-121 is a regulatory document addressing the replacement of the System Interface Unit (SIU) on Airbus Helicopters Deutschland GmbH MBB-BK117 D-2 (except D-2m variant) and D-3 helicopters. The directive applies to SIU Manufacturer Part Number 503-24-6-G installed on helicopters with serial numbers 20001 to 20360 and 21001 to 21999. It aims to ensure continued airworthiness by mandating replacement of affected SIUs based on their time since manufacture or last overhaul.

Airbus Helicopters MBB-BK 117
Airbus Helicopters MBB-BK 117 D-2
Airbus Helicopters MBB-BK 117 D-3
Airbus Helicopters MBB-BK117 D-2
Airbus Helicopters MBB-BK117 D-3

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 PAD 26-111

Landing Gear – Emergency Flotation System Adhesive Label – Removal

EASA Airworthiness Directive Proposal PAD No. 26-111 addresses the removal of a non-certified Emergency Flotation System (EFS) adhesive label, Part Number 214794-0, installed on Airbus Helicopters MBB-BK117 D-2 and D-3 models with serial numbers 20001 to 20360. The directive targets the incorrect EFS gas cylinder pressure limits displayed on the label, which could affect float inflation during ditching. This proposal applies to helicopters manufactured by Airbus Helicopters Deutschland GmbH and related entities.

Airbus Helicopters MBB-BK 117
Airbus Helicopters MBB-BK117 D-2
Airbus Helicopters MBB-BK117 D-3

EASA AD 2026-0152

Air Conditioning – Vapor Cycle Air Conditioning System – Inspection

EASA Airworthiness Directive 2026-0152 is an airworthiness directive addressing the vapor cycle air conditioning system on MBB-BK117 C-1 helicopters. It mandates recurring inspections of the louver box assembly, part number 117-820014, due to a reported in-flight detachment caused by incorrect installation. The directive applies to all serial numbers of the affected helicopter model and aims to prevent potential in-flight loss of parts and reduced helicopter control.

Airworthiness Directive

Airbus Helicopters MBB-BK 117
MBB-BK117 C-1

EASA AD 2026-0151

Main Rotor Drive – Rotor Hub-Shaft – Inspection

EASA Airworthiness Directive 2026-0151 is an official safety directive addressing the inspection of the main rotor drive rotor hub-shaft on Airbus Helicopters Deutschland GmbH MBB-BK117 D-3 and D-3m helicopters. The directive mandates visual and eddy current inspections of specific rotor hub-shaft parts (MP/N D623M1501203 and D623M1501204) to detect cracks that could lead to main rotor transmission failure. This AD applies to all serial numbers of the affected helicopter models.

Airworthiness Directive

Airbus Helicopters MBB-BK 117
Airbus Helicopters MBB-BK117 D-3
Airbus Helicopters MBB-BK117 D-3m

EASA AD 2026-0127

Main Rotor – Swashplate – Inspection

EASA Airworthiness Directive 2026-0127 is an airworthiness directive addressing the inspection of the main rotor swashplate and its bearing bolts on MBB-BK117 D-3 and D-3m helicopters. It mandates repetitive inspections of the swashplate bolts, specifically those with Part Number D623M2050206, to detect excessive wear that could compromise helicopter control.

Airworthiness Directive

Airbus Helicopters MBB-BK 117
MBB-BK117 D-3
MBB-BK117 D-3m

EASA AD 2026-0109

Oxygen – Low Pressure Oxygen Hoses – Replacement

EASA Airworthiness Directive 2026-0109 is issued for MBB-BK117 D-2 and D-3 helicopters modified with EASA Supplemental Type Certificate 10051018 up to revision 5. It addresses the replacement of low-pressure oxygen hoses installed in Emergency Medical Service interiors manufactured by Mecaer Aviation Group. The directive mandates replacing specific oxygen hoses and assemblies to prevent potential oxygen leakage.

Airworthiness Directive

Airbus Helicopters MBB-BK 117
MBB-BK117 D-2
MBB-BK117 D-3

EASA AD 2025-0298-E

Main Rotor — Swashplate — Inspection

EASA Airworthiness Directive 2025-0298-E is an emergency directive addressing the inspection of the main rotor swashplate on MBB-BK117 D-3 and D-3m helicopters. It mandates repetitive inspections of the swashplate bolts, specifically those with Part Number D623M2050206, due to reported excessive wear that could lead to bolt rupture and reduced helicopter control. The directive applies to all serial numbers of the affected helicopter models.

Airworthiness DirectiveSuperseded

Airbus Helicopters MBB-BK 117

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 2025-0188

Equipment / Furnishings — Large Hook Damper Assembly — Modification

EASA Airworthiness Directive 2025-0188 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting Airbus Helicopters Deutschland GmbH MBB-BK117 C-2 and D-2 helicopters. The directive addresses the Large Hook Damper Assembly, specifically parts with Part Number 44307-480, installed on these helicopter models. It mandates modification and reidentification of affected parts to ensure continued airworthiness and safety.

Airworthiness Directive

Airbus Helicopters MBB-BK 117

EASA AD 2025-0153

Equipment / Furnishings — Cargo Common Hook Beam — Modification

EASA Airworthiness Directive 2025-0153 is an official regulatory document addressing the modification of the Cargo Common Hook Beam (CCHB) on MBB-BK117 D-2 helicopters manufactured by Airbus Helicopters Deutschland GmbH. This directive mandates changes to the CCHB part number L851M1301101 and related fuel system components to prevent potential fuel leakage. The directive applies to all serial numbers of the MBB-BK117 D-2 helicopter variants.

Airworthiness Directive

Airbus Helicopters MBB-BK 117

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 2025-0051R1

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 2025-0028

Main Rotor — Main Rotor Head — Inspection / Re-identification

The document titled 'Main Rotor — Main Rotor Head — Inspection / Re-identification' applies to the AIRBUS HELICOPTERS DEUTSCHLAND MBB-BK 117 helicopter model. It addresses inspection and re-identification procedures for the main rotor head to ensure continued airworthiness and safety of the affected aircraft. The document provides guidance on maintaining the integrity of the main rotor assembly.

Airworthiness Directive

Airbus Helicopters MBB-BK 117

EASA AD 2025-0029

Main Rotor — Swashplate — Inspection

EASA Airworthiness Directive 2025-0029 is an airworthiness directive addressing the inspection of the main rotor swashplate on MBB-BK117 D-3 and D-3m helicopters. It specifically targets swashplates with Part Number D623M2050102 and serial numbers up to 0487 inclusive, except those already subjected to a supplementary inspection. The directive mandates a one-time inspection and corrective actions to ensure continued safe operation of affected helicopters.

Airworthiness Directive

Airbus Helicopters MBB-BK 117

EASA AD 2025-0027

Main Rotor — Swashplate Inner and Outer Ring Bolts — Inspection / Replacement

EASA Airworthiness Directive 2025-0027 is an airworthiness directive addressing the inspection and replacement of main rotor swashplate inner and outer ring bolts on MBB-BK117 D-3 and D-3m helicopters. It applies to swashplates with part number D623M2050102 up to serial number 0503, excluding certain serial numbers and those already inspected and corrected. The directive mandates inspection and replacement of bolts to ensure structural integrity of the swashplate.

Airworthiness Directive

Airbus Helicopters MBB-BK 117

EASA AD 2024-0222

[Correction] Equipment / Furnishings — Equipment Rack Extension Support Rails — Modification

EASA Airworthiness Directive 2024-0222 is a corrective directive addressing the modification of equipment rack extension support rails installed on MBB-BK117 C-2 helicopters modified by specific Aerolite AG Supplemental Type Certificates. The directive targets certain support tubes and fork fittings associated with equipment rack extensions to ensure continued airworthiness. It applies to all serial numbers of the MBB-BK117 C-2 helicopter modified by the listed STCs.

Airworthiness Directive

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 2024-0237-E

Rotors Flight Control — Tail Rotor Actuator — Inspection

EASA Airworthiness Directive 2024-0237-E is an emergency directive addressing the tail rotor actuator on MBB-BK117 C-2 helicopters. It mandates inspections of the tail rotor actuator part number B673M40A1002 due to reported vibrations and a worn, broken bolt that could lead to loss of helicopter control. The directive applies to all serial numbers of this helicopter model and requires repetitive inspections and corrective actions as necessary.

Airworthiness Directive

Airbus Helicopters MBB-BK 117