EASA Regulations for Airbus Helicopters EC 155 B

12 airworthiness directives and regulations affecting Airbus Helicopters EC 155 B.

EASA AD 2024-0173

SUPERSEDED BY EASA AD 2026-0011

EASA Airworthiness Directive 2024-0173 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting Airbus Helicopters EC 155 B and EC 155 B1 models. It addresses the modification of jettisonable windows and seals on the sliding doors and fixed panels to ensure proper emergency egress capability. This directive mandates specific modifications to improve safety during emergency evacuations.

Sep 4, 2024

Airworthiness DirectiveMaintenanceSafety MgmtAirbus Helicopters SAAirbus Helicopters AS 365Airbus Helicopters EC 155Airbus Helicopters EC 155 BAirbus Helicopters EC 155 B1

EASA AD 2022-0261

Fire Protection — Fire Detectors — Replacement

EASA Airworthiness Directive 2022-0261 is an airworthiness directive addressing fire detector replacements on Airbus Helicopters AS 365 N3, EC 155 B, and EC 155 B1 models. It targets specific fire detectors with identified manufacturing non-compliance that may cause spurious engine fire warnings. The directive mandates replacement of affected fire detectors to ensure continued safe operation of these helicopters.

Dec 20, 2022

Airworthiness DirectiveMaintenanceSafety MgmtAirbus Helicopters SAAirbus Helicopters AS 365Airbus Helicopters EC 155Safran ARRIEL 2Airbus Helicopters AS 365 N3Airbus Helicopters EC 155 BAirbus Helicopters EC 155 B1

EASA AD 2021-0225

Rotorcraft Flight Manual — Supplements / One-Engine Inoperative Performance Limitations — Amendment

The Rotorcraft Flight Manual — Supplements / One-Engine Inoperative Performance Limitations — Amendment is an EASA Airworthiness Directive 2021-0225 issued for Airbus Helicopters EC 155 B and EC 155 B1 models. This directive addresses discrepancies in the Rotorcraft Flight Manual related to stay-up flying capabilities under one-engine inoperative conditions, ensuring compliance with applicable airworthiness standards. It mandates updates to the flight manual limitations to include necessary performance and weight restrictions.

Oct 8, 2021

Airworthiness DirectiveFlight OpsSafety MgmtAirbus Helicopters SAAirbus Helicopters AS 365Airbus Helicopters EC 155Airbus Helicopters EC 155 BAirbus Helicopters EC 155 B1

EASA AD 2021-0170

Tail Rotor — Double Bearing — Inspection / Replacement

EASA Airworthiness Directive 2021-0170 is an airworthiness directive addressing inspection and replacement requirements for double bearings with Part Numbers 704A33-651-245 or 704A33-651-246 installed on tail rotor gearboxes (P/N 365A33-6005-09) of Airbus Helicopters AS 365 N2, AS 365 N3, EC 155 B, EC 155 B1, and SA 365 N1 models. The directive mandates repetitive inspections of the tail rotor gearbox chip detector and sets replacement intervals for affected parts to prevent loss of yaw control. It applies to all serial numbers of the specified helicopter models.

Jul 19, 2021

Airworthiness DirectiveMaintenanceSafety MgmtAirbus Helicopters SAAirbus Helicopters AS 365Airbus Helicopters EC 155Airbus Helicopters AS 365 N2Airbus Helicopters AS 365 N3Airbus Helicopters EC 155 BAirbus Helicopters EC 155 B1Airbus Helicopters SA 365 N1

EASA AD 2020-0043

Main Rotor Drive — Main Gearbox — Replacement

EASA Airworthiness Directive 2020-0043 is an airworthiness directive issued by the European Union Aviation Safety Agency concerning Airbus Helicopters EC 155 B and EC 155 B1 models. It addresses the replacement of main gearboxes (MGB) with specific part numbers and serial numbers due to potential manufacturing inspection errors. The directive mandates actions to ensure continued safe operation of affected helicopters.

Mar 2, 2020

Airworthiness DirectiveMaintenanceSafety MgmtAirbus Helicopters SAAirbus Helicopters AS 365Airbus Helicopters EC 155Airbus Helicopters EC 155 BAirbus Helicopters EC 155 B1

EASA AD 2019-0246

Rotors Flight Control — Collective Controls / Protective Cover — Modification

EASA Airworthiness Directive 2019-0246 is an airworthiness directive addressing Airbus Helicopters EC 155 B and EC 155 B1 models. It focuses on the modification of the protective cover for the "SHEAR" control pushbutton on pilot and copilot collective sticks to prevent mechanical deformation and potential unintended shearing of the hoist cable.

Oct 1, 2019

Airworthiness DirectiveMaintenanceSafety MgmtAirbus Helicopters SAAirbus Helicopters AS 365Airbus Helicopters EC 155Airbus Helicopters EC 155 BAirbus Helicopters EC 155 B1

EASA AD 2019-0180

Engine Fuel & Control — Fuel Filter Pre-blockage Pressure Switch — Operational Check

EASA Airworthiness Directive 2019-0180 is an airworthiness directive addressing SAFRAN Helicopter Engines ARRIEL 2 series engines installed on various helicopters including Airbus Helicopters AS 350 B3, EC 130 B4, AS 365 N3, EC 155 B, and Sikorsky S-76C. The directive mandates operational checks and visual inspections of the fuel filter pre-blockage pressure switch to ensure proper functionality and prevent uncommanded engine shutdowns due to fuel contamination.

Jul 25, 2019

Airworthiness DirectiveMaintenanceSafety MgmtSafran ARRIEL 2Airbus Helicopters AS 350 B3Airbus Helicopters EC 130 B4Airbus Helicopters AS 365 N3Airbus Helicopters EC 155 BSikorsky S-76C

EASA AD 2019-0165-E

Tail Rotor Drive — Tail Rotor Gearbox — Inspection / Replacement

EASA Airworthiness Directive 2019-0165-E is an emergency directive addressing the tail rotor gearbox (TGB) inspection and replacement requirements for Airbus Helicopters SA 365 N1, AS 365 N2, AS 365 N3, EC 155 B, and EC 155 B1 models. The directive mandates a one-time inspection of the TGB housing recess and oil duct cover to detect oil retention or foreign objects that could impair lubrication and control. It applies to all serial numbers of the affected helicopter models.

Jul 12, 2019

Airworthiness DirectiveMaintenanceSafety MgmtAirbus Helicopters SAAirbus Helicopters AS 365Airbus Helicopters EC 155Airbus Helicopters SA 365 N1Airbus Helicopters AS 365 N2Airbus Helicopters AS 365 N3Airbus Helicopters EC 155 BAirbus Helicopters EC 155 B1

EASA AD 2018-0263

Time Limits / Maintenance Checks — Main Gearbox Magnetic Plugs — Inspection Main Rotor Drive — Planet Gear Assemblies — Replacement

EASA Airworthiness Directive 2018-0263 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting Airbus Helicopters EC 155 B and EC 155 B1 models. It addresses inspection and replacement requirements for main gearbox magnetic plugs and planet gear assemblies to ensure continued airworthiness and safety. The directive mandates inspections and potential replacement of affected planet gear assemblies identified by specific part and serial numbers.

Dec 7, 2018

Airworthiness DirectiveMaintenanceSafety MgmtAirbus Helicopters SAAirbus Helicopters AS 365Airbus Helicopters EC 155Airbus Helicopters EC 155 BAirbus Helicopters EC 155 B1

EASA AD 2018-0258

Windows — Swing Door Jettisonable Window — Modification

EASA Airworthiness Directive 2018-0258 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting Airbus Helicopters EC 155 B and EC 155 B1 models fitted with hinged cabin doors. The directive mandates a modification to the swing door jettisonable windows to ensure they can be opened with the required force. This AD addresses a safety concern related to the difficulty in jettisoning these windows during emergency evacuations.

Nov 30, 2018

Airworthiness DirectiveMaintenanceSafety MgmtAirbus Helicopters SAAirbus Helicopters AS 365Airbus Helicopters EC 155Airbus Helicopters EC 155 BAirbus Helicopters EC 155 B1

EASA AD 2018-0069

Navigation — Flight / Ground Logic — Modification

EASA Airworthiness Directive 2018-0069 is an airworthiness directive affecting Airbus Helicopters EC 155 B and EC 155 B1 models. It addresses a safety issue related to the Flight/Ground signal logic used by the Attitude Heading and Reference Systems (AHRS) on these helicopters. The directive mandates modifications to ensure independent Flight/Ground signal supply to each AHRS to prevent erroneous flight instrument indications.

Mar 26, 2018

Airworthiness DirectiveMaintenanceSafety MgmtAirbus Helicopters SAAirbus Helicopters AS 365Airbus Helicopters EC 155Airbus Helicopters EC 155 BAirbus Helicopters EC 155 B1

EASA AD 2018-0052

SUPERSEDED BY EASA AD 2018-0263

EASA Airworthiness Directive 2018-0052 is an airworthiness directive applicable to Airbus Helicopters EC 155 B and B1 models. It addresses safety concerns related to the main gearbox (MGB) planet gear assemblies, specifically types Y and Z, which have been found susceptible to spalling and cracking. The directive mandates inspections and replacements to ensure continued airworthiness of affected helicopters.

Mar 2, 2018

Airworthiness DirectiveMaintenanceSafety MgmtAirbus Helicopters SAAirbus Helicopters AS 365Airbus Helicopters EC 155Airbus Helicopters EC 155 BAirbus Helicopters EC 155 B1