RegNotify

EASA Regulations for De Havilland Canada DHC-8

52 airworthiness directives and regulations affecting De Havilland Canada DHC-8.

EASA AD CF-2026-06

Landing Gear — Main Landing Gear Aft Door Mechanism — Lock Link Apex Pin/Bolt Fracture

EASA Airworthiness Directive CF-2026-06 addresses a fracture issue in the main landing gear aft door mechanism lock link apex pin/bolt on De Havilland DHC-8-401 and -402 aircraft, serial numbers 4001 and 4003 through 4633. The directive mandates inspections and replacement of specific apex pins and bolts to prevent asymmetric main landing gear extension. It applies to aircraft equipped with part numbers 46852-1 and NAS6207-17D and introduces a new apex pin P/N 46857-1.

Feb 5, 2026
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8

EASA AD CF-2026-04

Landing Gear — Main Landing Gear Premature Tire Failure

EASA Airworthiness Directive CF-2026-04 addresses premature tire failures on the main landing gear of De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes. The directive targets Goodyear tires with part number 347K63-1 and serial numbers before 8232xxxx, which may have a manufacturing defect leading to early failure. It mandates inspection, removal, and replacement of affected tires to ensure safe landing performance.

Feb 2, 2026
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8

EASA AD CF-2025-69

Fuel System — Potential Fuel Leak in Dry-Bay — Missing Sealant

EASA Airworthiness Directive CF-2025-69 is issued for De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes, serial numbers 4001 and 4003 through 4633. The directive addresses a potential fuel leak in the wing dry-bay caused by missing sealant on a specific bracket assembly. It mandates inspection and sealant application to prevent fuel leakage and associated risks.

Jan 12, 2026
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8

EASA AD CF-2025-55

Navigation — 5G C-Band wireless Broadband Interference with Radio Altimeter System when operating in Canadian airspace

The Canadian Airworthiness Directive CF-2025-55 addresses interference caused by 5G C-Band wireless broadband signals with radio altimeter systems on De Havilland Aircraft of Canada DHC-8-401 and DHC-8-402 aircraft operating in Canadian airspace. It mandates specific operational limitations and modifications to ensure safe aircraft operation amid 5G deployment. The directive focuses on mitigating risks associated with erroneous radio altimeter data due to 5G signal interference.

Nov 12, 2025
Airworthiness DirectiveFlight OpsSafety MgmtDe Havilland Canada DHC-8

EASA AD CF-2025-54

Navigation — 5G C-Band wireless Broadband Interference with Radio Altimeter System when operating in Canadian airspace affected by 5G C-Band wireless signals

Airworthiness Directive CF-2025-54 addresses interference issues between 5G C-Band wireless broadband signals and radio altimeter systems on De Havilland Aircraft of Canada DHC-8-100/-200/-300 aeroplanes operating in Canadian airspace. The directive mandates configuration of these aircraft as Radio Altimeter Tolerant (RAT) to ensure safe operation amid 5G C-Band deployments. It applies to all serial numbers of the specified aircraft models and focuses on mitigating erroneous radio altimeter data caused by 5G interference.

Nov 12, 2025
Airworthiness DirectiveSafety MgmtDe Havilland Canada DHC-8

EASA SIB CASA-2025-11

Part Number MS20220-3 Pulleys with Corroded and Dislodged Bearings

Part Number MS20220-3 Pulleys with Corroded and Dislodged Bearings is a Transport Canada Civil Aviation Safety Alert (CASA 2025-11) addressing corrosion issues in flight control pulleys and pulley bearing assemblies installed on De Havilland Canada (DHC) DASH 8 series 100/200/300/400 aircraft. The alert highlights multiple service difficulty reports involving corroded and seized pulleys causing stiff roll control and autopilot disconnection. It targets operators and maintenance personnel responsible for the affected flight control systems.

Nov 3, 2025
Safety Information BulletinMaintenanceSafety MgmtDe Havilland Canada DHC-8

EASA AD CF-2025-52

Navigation — 5G C-Band wireless Broadband Interference with Radio Altimeter System when operating in the contiguous United States of America (U.S.) airspace.

The Canadian Airworthiness Directive CF-2025-52 addresses interference caused by 5G C-Band wireless broadband signals with radio altimeter systems on De Havilland Aircraft of Canada Limited DHC-8-100, -200, and -300 series aircraft operating in the contiguous United States airspace. This directive mandates modifications to affected aircraft radio altimeters to ensure tolerance against 5G interference and introduces interim operational limitations. It specifically targets aircraft equipped with Honeywell RT-300 radio altimeters.

Oct 31, 2025
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8

EASA AD CF-2025-43

Navigation — 5G C-Band wireless Broadband Interference with Radio Altimeter System when operating in the contiguous United States of America (U.S.) airspace

Airworthiness Directive CF-2025-43 issued by Transport Canada addresses interference from 5G C-Band wireless broadband signals affecting the radio altimeter systems on De Havilland Aircraft of Canada Limited DHC-8-401 and DHC-8-402 aeroplanes operating in contiguous U.S. airspace. The directive mandates specific operational limitations and modifications to mitigate erroneous radio altitude data caused by 5G interference. It requires affected aircraft to be configured as Radio Altimeter Tolerant (RAT) aeroplanes to ensure safe operations.

Sep 9, 2025
Airworthiness DirectiveFlight OpsMaintenanceSafety MgmtDe Havilland Canada DHC-8

EASA AD CF-2025-33

Wing — Wing Access Panels with Un-trimmed Stiffeners and/or Reduced Thickness

Canadian Airworthiness Directive CF-2025-33 addresses wing access panels with un-trimmed stiffeners and/or reduced thickness on De Havilland Aircraft of Canada Limited model DHC-8 series aircraft, including models 102, 103, 106, 201, 202, 301, 311, 314, and 315. The directive focuses on ensuring the right-hand wing access panel stiffener is properly trimmed and that access panels of correct thickness are installed to prevent potential fuel tank ignition risks. It applies to all serial numbers of the affected models.

Jul 7, 2025
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8

EASA AD CF-2025-19

Stabilizers — Elevator Power Control Unit (PCU) Bracket and Elevator Front Spar Cracks

Canadian Airworthiness Directive CF-2025-19 addresses cracks found in the Elevator Power Control Unit (PCU) bracket and elevator front spar on De Havilland Aircraft of Canada Limited DHC-8-401 and DHC-8-402 aeroplanes, specifically serial numbers 4001 and 4003 through 4633. The directive mandates inspections and modifications to prevent elevator jamming and potential loss of pitch control. It includes updated design solutions and inspection procedures to enhance structural integrity of the horizontal stabilizer and elevator assemblies.

Mar 31, 2025
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8

EASA AD CF-2024-10

Flight Controls — Elevator Power Control Unit Bracket Cracks

Canadian Airworthiness Directive CF-2024-10 addresses cracks found in the elevator power control unit (PCU) brackets and elevator front spar on De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes, serial numbers 4001 and 4003 through 4580. The directive mandates inspections and corrective actions to prevent potential elevator jamming and loss of pitch control. It applies to specific parts including the horizontal stabilizer rear spar assembly P/N 85517044 and elevator structure assembly P/N 85527021.

Mar 8, 2024
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8De Havilland Aircraft of Canada DHC-8-401De Havilland Aircraft of Canada DHC-8-402

EASA AD CF-2020-51R2

Nacelles/Pylons — Attachment Pin Corrosion

Canadian Airworthiness Directive CF-2020-51R2 addresses corrosion issues in the attachment pins of nacelles and pylons on De Havilland DHC-8-401 and DHC-8-402 aircraft, specifically serial numbers 4001, 4003 through 4550, and 4583 through 4590. The directive mandates inspections and corrective actions to prevent premature corrosion and potential failure of nacelle to landing gear and wing rear spar attachment pins. This directive updates previous versions to clarify applicability and maintain required protective treatments.

Feb 28, 2024
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8De Havilland DHC-8-401De Havilland DHC-8-402

EASA AD CF-2024-01

Landing Gear — Main Landing Gear — Brake Fuse/Shuttle Valve Assembly — Failure Caused by Assembly Error

Canadian Airworthiness Directive CF-2024-01 addresses a failure in the brake fuse/shuttle valve assembly caused by a factory assembly error affecting De Havilland Aircraft of Canada Limited DHC-8-401 and DHC-8-402 aeroplanes, serial numbers 4001, 4003, and subsequent. The directive mandates inspection and possible replacement of affected fuse/shuttle valve assemblies to prevent loss of critical landing gear and braking functions. This AD aims to ensure continued safe operation of the affected aircraft models.

Jan 12, 2024
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8De Havilland DHC-8-401De Havilland DHC-8-402

EASA AD 2021-0234R1

Information Systems — Electronic Flight Bag Universal Serial Bus Receptacle — Modification

EASA Airworthiness Directive 2021-0234R1 is a regulatory update addressing the modification of Electronic Flight Bag (EFB) Universal Serial Bus (USB) receptacles installed on various aircraft including Fokker F27 and F28 models, Airbus A318 through A340 series, ATR42 and ATR72, Boeing 737 through 777 models, Bombardier CL-600 series, and De Havilland Canada DHC-8 aircraft. The directive mandates modifications to affected USB receptacles to prevent overheating and potential smoke or fumes in the cockpit. This AD applies to specific manufacturer serial numbers as detailed in the directive's appendix.

May 11, 2023
Airworthiness DirectiveMaintenanceSafety MgmtAirbus A318Airbus A319Airbus A320Airbus A321Airbus A330Airbus A340ATR ATR42ATR ATR72Boeing 737Boeing 757Boeing 767Boeing 777Bombardier CL-600 (Challenger)De Havilland Canada DHC-8Fokker CRR-0146Fokker CRR-0185Fokker CRR-0186Fokker CRR-0190Fokker CRR-0206Fokker CRR-0210Fokker CRR-0241Fokker CRR-0265Fokker CRR-0290Fokker CRR-0300Fokker CRR-0309MHI RJ Aviation CL-600 (Regional Jet)Fokker F27Fokker F28Boeing 747Bombardier CL-600

EASA AD CF-2023-22

Landing Gear — Nose Landing Gear and Doors — Loss of Pivot Pin Retention Bolt

Airworthiness Directive CF-2023-22 is issued by Transport Canada and applies to De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes, serial numbers 4001 and 4003 through 4633. The directive addresses the loss of the pivot pin retention bolt on the nose landing gear and associated doors, which could lead to loss of directional control or tire rupture during take-off or landing. It mandates specific inspections, replacements, and maintenance actions to ensure continued airworthiness.

Mar 31, 2023
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8De Havilland DHC-8-401De Havilland DHC-8-402

EASA SIB 2023-02

Broken Aileron Cable and Non-reversible Filtering of Control Position Data for Flight Data Recording

EASA Safety Information Bulletin 2023-02 is an airworthiness bulletin addressing issues related to broken aileron cables and non-reversible filtering of control position data for flight data recording on De Havilland Aircraft of Canada Ltd. DHC-8-401 and DHC-8-402 aeroplanes. The bulletin highlights an incident involving a broken lower left aileron cable and discusses the impact of filtering on flight data recorder accuracy. It also references relevant Bombardier/De Havilland service bulletins and operator messages related to cable wear protection and flight data recording system updates.

Feb 1, 2023
Safety Information BulletinMaintenanceSafety MgmtDe Havilland Canada DHC-8

EASA AD CF-2022-69

Landing Gear — Alternate Extension System — Cam Assembly Failures

Canadian Airworthiness Directive CF-2022-69 addresses landing gear alternate extension system cam assembly failures on De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes, serial numbers 4001 and 4003 through 4633. The directive mandates inspections and replacement of specific parts to prevent failure of the main landing gear alternate extension system. It also updates maintenance procedures to detect and correct damage to critical components.

Dec 19, 2022
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8De Havilland Aircraft of Canada Limited DHC-8-401De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2022-63

Fuselage — Wing-to-Fuselage Joint — Moisture Ingress Between Front and Rear Spar Frame Segments

Canadian Airworthiness Directive CF-2022-63 addresses moisture ingress issues in the wing-to-fuselage joint of De Havilland Aircraft of Canada Limited DHC-8-401 and -402 aeroplanes, serial numbers 4001 and 4003 through 4624. The directive mandates inspections and retrofits to prevent corrosion and potential structural failure at the front and rear spar frame segments. This AD ensures continued airworthiness and safety of the affected aircraft models.

Nov 18, 2022
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8De Havilland Aircraft of Canada DHC-8-401De Havilland Aircraft of Canada DHC-8-402

EASA AD CF-2022-59

Maintenance Requirements Manual, Part 2 Airworthiness Limitation Items — Introduction of New Section 7-00 — Candidate Certification Maintenance Requirements Limitations

Maintenance Requirements Manual, Part 2 Airworthiness Limitation Items — Introduction of New Section 7-00 — Candidate Certification Maintenance Requirements Limitations is a Canadian Airworthiness Directive CF-2022-59 issued by Transport Canada. It applies to De Havilland Aircraft of Canada Limited model DHC-8-401 and -402 aeroplanes of all serial numbers. The directive mandates the incorporation of a new section in the Maintenance Requirements Manual that introduces Candidate Certification Maintenance Requirements limitations for continued airworthiness.

Oct 28, 2022
Airworthiness DirectiveMaintenanceDe Havilland Canada DHC-8De Havilland DHC-8-401De Havilland DHC-8-402

EASA AD CF-2022-52

Flight Controls — Flap Power Unit — Pressure Switch Failures

Canadian Airworthiness Directive CF-2022-52 addresses flap power unit pressure switch failures on De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes, serial numbers 4001 and 4003 through 4633. The directive mandates replacement of certain flap power unit pressure switches to prevent flap inoperative events caused by hydraulic pressure spikes. This AD aims to enhance flight safety by reducing the risk of abnormal flap landings and emergency procedures.

Sep 2, 2022
Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8De Havilland Aircraft of Canada Limited DHC-8-401De Havilland Aircraft of Canada Limited DHC-8-402