EASA Regulations for Bell 407

19 airworthiness directives and regulations affecting Bell 407.

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New ADs and bulletins for Bell 407, summarized like the ones below, every Monday.

EASA AD CF-2025-21R1

Nov 24, 2025

Main Rotor — Expandable Blade Bolt incorrect heat treatment

Canadian Airworthiness Directive CF-2025-21R1 addresses an issue with expandable blade bolts, part number 406-310-103-103, installed on Bell Textron Canada Limited model 407 and 427 helicopters. The directive identifies that some bolts may have incorrect heat treatment, which could lead to stress corrosion cracking and potential main rotor blade detachment. This directive mandates inspection and replacement of affected bolts to ensure continued airworthiness.

Airworthiness Directive
  • Bell 407
  • Bell 427

EASA AD CF-2025-59

Nov 20, 2025

Fuselage — Tailboom — Tailboom Attachment Hardware Fracture

The Canadian Airworthiness Directive CF-2025-59 addresses a critical safety issue involving Bell Textron Canada Limited model 407 helicopters. It mandates inspections and maintenance actions related to the tailboom attachment hardware, specifically focusing on the upper left longeron assembly and associated bolts to prevent tailboom separation during flight. This directive applies to all serial numbers of the Bell 407 helicopter.

Airworthiness Directive
  • Bell 407

EASA AD CF-2025-22

May 5, 2025

Communication — Electrical harness chafing condition

Canadian Airworthiness Directive CF-2025-22 addresses an electrical harness chafing condition in Bell Textron Canada Limited Model 407 helicopters, specifically serial numbers 54300 through 54752, 54805 through 54999, and 56300 through 56366 and 56368. The directive requires inspection and corrective actions to prevent potential smoke or fire hazards in the cockpit caused by chafing of electrical harnesses near the instrument panel. This directive is issued under Canadian Aviation Regulation 521.427 and applies from May 7, 2025.

Airworthiness Directive
  • Bell 407

EASA SIB CASA-2025-02

Mar 24, 2025

Collective Pitch Transducers Part Number 412-074-101-103/-107 causing Engine Parameter Oscillations and Full Authority Digital Engine Control (FADEC) Faults

The Transport Canada Civil Aviation Safety Alert (CASA) titled "Collective Pitch Transducers Part Number 412-074-101-103/-107 causing Engine Parameter Oscillations and Full Authority Digital Engine Control (FADEC) Faults" addresses issues affecting Bell Textron Canada Limited (BTCL) Model 407 helicopters. The alert informs owners, operators, and maintainers about engine parameter oscillations and FADEC faults linked to specific collective pitch transducers (CPT) part numbers 412-074-101-103 and 412-074-101-107 installed on these helicopters.

Safety Information Bulletin
  • Bell 407

EASA AD US-2024-20-07

Nov 29, 2024

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 CF-2024-18

May 30, 2024

Rotors Flight Control — Cyclic Stick Tube Cracking

Canadian Airworthiness Directive CF-2024-18 addresses cracking in the cyclic stick tube assembly on Bell Textron Canada Limited model 407 helicopters with specific serial numbers and part numbers 206-001-342-101 or 206-001-342-101FM. The directive mandates revisions to the Interior and Prestart Check procedures and requires inspections and corrective actions to detect and repair or replace cracked cyclic stick tubes. This AD aims to prevent in-flight failure of the cyclic stick tube and potential loss of helicopter control.

Airworthiness Directive
  • Bell 407
  • Bell Textron Canada Limited 407

EASA AD CF-2023-63

Aug 18, 2023

Tail Rotor Blade — Missing Adhesive between Upper Skin and Core

Canadian Airworthiness Directive CF-2023-63 is an emergency directive addressing Bell Textron Canada Limited model 407 helicopters with specific serial numbers. It mandates inspection and possible replacement of tail rotor blades, part number 406-016-100-119, due to missing adhesive between the upper skin and core. This issue can cause severe vibration and potential tail rotor failure.

Airworthiness Directive
  • Bell 407
  • Bell Textron Canada Limited 407

EASA AD CF-2023-11

Feb 24, 2023

Fuel System — Standpipe Assembly Sharp Edges Leading to Fuel Quantity Wiring Harness Chafing Condition

Canadian Airworthiness Directive CF-2023-11 addresses a fuel system issue on Bell Helicopter Textron Canada Limited model 407 helicopters, specifically serial numbers 54832 through 54931, 54933 through 54939, and 54942 through 54954. The directive concerns sharp edges on the standpipe assembly part number 407-062-032-103 that may cause chafing of the fuel quantity wiring harness. This condition could lead to fuel quantity indication errors or potential fuel tank ignition.

Airworthiness Directive
  • Bell 407
  • Bell Helicopter Textron Canada Limited 407

EASA AD CF-2022-68

Dec 16, 2022

Fuselage – Tailboom – Loss of Tailboom Attachment Hardware

Canadian Airworthiness Directive CF-2022-68 addresses safety concerns for Bell Textron Canada Limited model 407 helicopters, specifically serial numbers 53000 through 56304. This directive mandates inspections and torque checks of the tailboom attachment hardware to prevent potential loss of tailboom attachment and consequent loss of helicopter control. The directive follows findings from a National Transportation Safety Board investigation into missing tailboom attachment hardware.

Airworthiness DirectiveSuperseded
  • Bell 407
  • Bell Textron Canada Limited 407

EASA AD CF-2021-34

Nov 4, 2021

Fuselage — Tailboom — Lower Skin Cracking

Canadian Airworthiness Directive CF-2021-34 addresses a structural issue involving lower skin cracking on the tailboom of Bell Textron Canada Limited model 407 helicopters, specifically serial numbers 53000 through 53900, 53911 through 54166, 54300 and subsequent. The directive mandates inspections and maintenance actions to detect and correct fatigue cracks near the horizontal stabilizer cutout to ensure continued airworthiness. This AD is issued under Canadian Aviation Regulation 521.427 and applies to affected Bell 407 helicopters.

Airworthiness Directive
  • Bell 407
  • Bell Textron Canada Limited 407

EASA AD CF-2016-13R1

Sep 13, 2019

Main Rotor Drive — Loss of Lubrication to the Freewheel Assembly

The Canadian Airworthiness Directive CF-2016-13R1 titled 'Main Rotor Drive — Loss of Lubrication to the Freewheel Assembly' applies to Bell Helicopter Textron Canada Limited models 206A, 206B, 206L series, and 407 helicopters. It addresses the risk of main rotor mast failure caused by blocked oil restrictors in the freewheel lubrication circuit, which can lead to loss of helicopter control. The directive mandates inspections, cleaning, and possible replacement of components to ensure proper lubrication flow.

Airworthiness Directive
  • Bell 206
  • Bell 407
  • Bell Helicopter Textron Canada 206A
  • Bell Helicopter Textron Canada 206B
  • Bell Helicopter Textron Canada 206L series
  • Bell Helicopter Textron Canada 407

EASA AD CF-2011-42R1

Jun 12, 2019

Fuselage - Longeron Cracking - Inspection / Repair.

The Canadian Airworthiness Directive CF-2011-42R1 addresses fuselage longeron cracking in Bell Helicopter Textron Canada Limited Model 407 helicopters, specifically those equipped with upper left longeron assemblies part numbers 206-031-314-037, 206-031-314-177, or spare assembly 206-031-314-219B. This directive mandates inspections and repairs to detect and correct cracking in the upper left longeron to maintain structural integrity and ensure flight safety. It applies to helicopters with serial numbers 53000 through 53900, 53911 through 54061, and 54300.

Airworthiness Directive
  • Bell 407
  • Bell Helicopter Textron Canada Limited Model 407

EASA AD CF-2019-01

Jan 10, 2019

Standard Practices — Helicopter External Transport System (HETS—¢) - Unapproved Parts, Inadequate Service Life Limits and Maintenance Requirements

Airworthiness Directive CF-2019-01 is a Canadian regulatory document addressing the Helicopter External Transport System (HETS™) certified under Transport Canada Supplemental Type Certificate SH98-35 installed on specific helicopter models including Bell 206B, 206L series, 407, Airbus Helicopters AS350 and AS355 series, and MD Helicopter 369 and 500N series. The directive focuses on issues related to unapproved parts, inadequate service life limits, and maintenance requirements for HETS™ components. It mandates inspections, component removals, and flight manual amendments to ensure continued airworthiness and safety.

Airworthiness Directive
  • Airbus Helicopters AS 350
  • Airbus Helicopters EC 130
  • Airbus Helicopters AS 355
  • Bell 206
  • Bell 407
  • Md Helicopters Inc (Mdhi) 369
  • Md Helicopters Inc (Mdhi) 500N
  • Bell 206B
  • Bell 206L
  • Airbus Helicopters AS350
  • Airbus Helicopters AS355
  • MD Helicopter 369
  • MD Helicopter 500N

EASA AD US-2018-25-17

Jan 7, 2019

Air Conditioning - Electrical Connectors - Replacement

Airworthiness Directive 2018-25-17 is a final rule issued by the FAA addressing Air Comm Corporation air conditioning systems installed on various Airbus Helicopters models including AS350 series and EC130B4, as well as Bell 206 and 407 series helicopters. The directive mandates the replacement of certain electrical connectors in these air conditioning systems to prevent overheating. It applies to specific Air Comm part numbers installed on these helicopters.

Airworthiness Directive
  • Air Comm Corporation CAA UK AAN 25273
  • Airbus Helicopters AS 350
  • Airbus Helicopters EC 130
  • Bell 206
  • Bell 407
  • Airbus Helicopters AS350
  • Airbus Helicopters EC130B4

EASA AD CF-2018-16

Jun 18, 2018

Equipment / Furnishings — Seat Belt Comfort Clips Adverse Effect on Occupant Restraint

Canadian Airworthiness Directive CF-2018-16 addresses the safety issue related to seat belt comfort clips installed on Bell Helicopter Textron Canada Limited (BHTCL) models 206, 222, 230, 407, 427, 429, and 430 helicopters. The directive identifies that these comfort clips can interfere with the shoulder harness inertia reel, potentially preventing proper locking and increasing injury risk during emergency landings. It mandates removal of these clips and prohibits their installation to ensure occupant restraint effectiveness.

Airworthiness Directive
  • Bell 206
  • Bell 222
  • Bell 230
  • Bell 407
  • Bell 427
  • Bell 429
  • Bell 430
  • Bell Helicopter Textron Canada Limited 206
  • Bell Helicopter Textron Canada Limited 222
  • Bell Helicopter Textron Canada Limited 230
  • Bell Helicopter Textron Canada Limited 407
  • Bell Helicopter Textron Canada Limited 427
  • Bell Helicopter Textron Canada Limited 429
  • Bell Helicopter Textron Canada Limited 430

EASA SIB SW-15-20

Aug 18, 2015

Helicopters modified by Air Comm Corp. STC - Air Conditioning System Wiring

The FAA Special Airworthiness Information Bulletin SAIB: SW-15-20 provides information regarding potential overheating and melting of connectors in the air conditioning wiring of helicopters modified by Air Comm Corporation Supplemental Type Certificates (STCs). Affected helicopter models include Bell Helicopter 206, Bell 407, Bell 427, Agusta A119, Airbus AS350, Airbus EC120, and Airbus EC130. This bulletin alerts operators to possible wiring issues related to Molex connectors installed per Air Comm STCs.

Safety Information Bulletin
  • Bell 206
  • Bell 407
  • Bell 427
  • Agusta A119
  • Airbus AS350
  • Airbus EC120
  • Airbus EC130

EASA SIB 2007-25

Dec 6, 2010

WITHDRAWN / CANCELLED - TRANSPORT CANADA AD CF-2007-21R1 AND FAA AD 2007-19-53 HAVE BEEN ADOPTED BY EASA

The document titled 'WITHDRAWN / CANCELLED - TRANSPORT CANADA AD CF-2007-21R1 AND FAA AD 2007-19-53 HAVE BEEN ADOPTED BY EASA' is an EASA Safety Information Notice 2007-25 issued on 2007-09-17. It addresses tail rotor blade safety issues on various Bell helicopter models including the 204B, 205 series, 206 series, 206L series, 212, 222 series, 230, 407, 412 series, 427, and 430. The notice references Transport Canada Emergency AD CF-2007-2L1 and FAA Emergency AD 2007-19-53, which require inspections and corrective actions for tail rotor blades with missing balance weight screws.

Safety Information Bulletin
  • Bell 204B
  • Bell 205
  • Bell 206
  • Bell 206L
  • Bell 212
  • Bell 222
  • Bell 230
  • Bell 407
  • Bell 412
  • Bell 427
  • Bell 430

EASA SIB SW-10-42R1

Aug 17, 2010

Apical Industries, Inc. Emergency Float Kits (STC-installed) for Bell 206 and 407 series Helicopters

Special Airworthiness Information Bulletin SAIB: SW-10-42R1 is a revised FAA information bulletin addressing uneven deployment issues with Apical Industries, Inc. Emergency Float Kits installed on Bell 206 and Bell 407 series helicopters. The affected kits include specific part and serial numbers under STC SR01535LA. This bulletin informs operators about a deployment problem caused by incorrect installation of float inflation hoses.

Safety Information Bulletin
  • Bell 206
  • Bell 407

EASA SIB 2007-02

Jan 18, 2007

FAA SAIB NE-06-52 - Rolls-Royce Corporation 250-C30, -C40 and -C47 series Engines Combustor Liners

EASA Safety Information Notice 2007-02 is an informational bulletin addressing issues with combustor liners in Rolls-Royce Corporation 250-C30, -C40, and -C47 series engines. These engines are installed in helicopters including Bell models 206, 230, 407, and 430; MD Helicopter models 369F, 369FF, and 600; and Sikorsky model S76A. The notice highlights concerns about the use of an unapproved material, Hastelloy X, in combustor liner mixing cups, which may affect engine performance.

Safety Information Bulletin
  • Bell 206
  • Bell 230
  • Bell 407
  • Bell 430
  • MD Helicopters 369F
  • MD Helicopters 369FF
  • MD Helicopters 600
  • Sikorsky S76A