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EASA Regulations for De Havilland Canada DHC-8

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

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New ADs and bulletins for De Havilland Canada DHC-8, summarized like the ones below, every Monday.

EASA AD CF-2026-47R1

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

Airworthiness Directive CF-2026-47R1 addresses inspection and modification requirements for wing access panels with un-trimmed stiffeners and/or reduced thickness on De Havilland Aircraft of Canada Limited model DHC-8 series 100, 200, and 300 aircraft. The directive focuses on ensuring that the right-hand wing access panel stiffener is trimmed and that correct thickness panels are installed to prevent potential ignition sources in the wing fuel tank. It applies to all serial numbers of the specified models.

Airworthiness Directive

De Havilland Canada DHC-8102103106201202301311314315
De Havilland Aircraft of Canada Limited DHC-8 series 100
De Havilland Aircraft of Canada Limited DHC-8 series 200
De Havilland Aircraft of Canada Limited DHC-8 series 300

EASA AD CF-2026-47

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

Canadian Airworthiness Directive CF-2026-47 addresses wing access panels with un-trimmed stiffeners and/or reduced thickness on De Havilland Aircraft of Canada Limited model DHC-8 series 100, 200, and 300 aircraft. The directive focuses on ensuring the right-hand wing access panel stiffener is trimmed and that both left-hand and right-hand access panels of correct thickness are installed to prevent potential fuel tank ignition risks. This AD applies to all serial numbers of the specified models and supersedes a previous directive issued in 2025.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland Aircraft of Canada Limited DHC-8 series 100
De Havilland Aircraft of Canada Limited DHC-8 series 200
De Havilland Aircraft of Canada Limited DHC-8 series 300

EASA AD CF-2026-38

Maintenance Requirements Manual Part 2 - Airworthiness Limitation Items - Amendment

Maintenance Requirements Manual Part 2 - Airworthiness Limitation Items - Amendment is a Canadian Airworthiness Directive (AD CF-2026-38) affecting De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes. It mandates compliance with updated and more restrictive Candidate Certification Maintenance Requirements (CMR) limitations in the Maintenance Requirements Manual Part 2 Airworthiness Limitation Items section. The directive ensures continued airworthiness by requiring updated maintenance tasks and intervals.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland Aircraft of Canada Limited DHC-8-401
De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2026-37

Time Limits / Maintenance Checks – Airworthiness Limitation Items – Amendment

Canadian Airworthiness Directive CF-2026-37 is an amendment addressing Time Limits and Maintenance Checks for Airworthiness Limitation Items (ALI) on De Havilland Aircraft of Canada Limited DHC-8-401 and DHC-8-402 models. It mandates compliance with updated and more restrictive maintenance tasks as defined in the DHC Maintenance Requirements Manual PSM 1-84-7 Part 2. The directive applies to all serial numbers of these aircraft models and includes detailed inspection requirements for various structural components.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland Aircraft of Canada Limited DHC-8-401
De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2026-06R1

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

Canadian Airworthiness Directive CF-2026-06R1 addresses the fracture risk of the lock link apex pin/bolt in the main landing gear aft door mechanism on De Havilland DHC-8-401 and DHC-8-402 aircraft, serial numbers 4001 and 4003 through 4633. The directive mandates inspections and replacement of specific apex pins and bolts to prevent asymmetric landing gear extension caused by pin or bolt failure. It applies to apex pin P/N 46852-1 and apex bolt NAS6207-17D, requiring installation of a new pin P/N 46857-1.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland DHC-8-401
De Havilland DHC-8-402

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.

Airworthiness Directive

De 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.

Airworthiness Directive

De 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.

Airworthiness Directive

De 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.

Airworthiness Directive

De 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.

Airworthiness Directive

De 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.

Safety Information Bulletin

De 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.

Airworthiness Directive

De 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.

Airworthiness Directive

De 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.

Airworthiness Directive

De 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.

Airworthiness Directive

De 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.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland Aircraft of Canada DHC-8-401
De 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.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland DHC-8-401
De 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.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland DHC-8-401
De 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.

Airworthiness Directive

Airbus A318
Airbus A319
Airbus A320
Airbus A321
Airbus A330
Airbus A340
ATR ATR42
ATR ATR72
Boeing 737
Boeing 757
Boeing 767
Boeing 777
Bombardier CL-600 (Challenger)
De Havilland Canada DHC-8
Fokker CRR-0146
Fokker CRR-0185
Fokker CRR-0186
Fokker CRR-0190
Fokker CRR-0206
Fokker CRR-0210
Fokker CRR-0241
Fokker CRR-0265
Fokker CRR-0290
Fokker CRR-0300
Fokker CRR-0309
MHI RJ Aviation CL-600 (Regional Jet)
Fokker F27
Fokker F28
Boeing 747
Bombardier 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.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland DHC-8-401
De Havilland DHC-8-402