EASA Regulations for De Havilland Canada DHC-8

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

EASA SIB 2023-02

Feb 1, 2023

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.

Safety Information Bulletin
  • De Havilland Canada DHC-8

EASA AD CF-2022-69

Dec 19, 2022

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.

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-2022-63

Nov 18, 2022

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.

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-2022-59

Oct 28, 2022

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.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland DHC-8-401
  • De Havilland DHC-8-402

EASA AD CF-2022-52

Sep 2, 2022

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.

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-2022-29

May 30, 2022

Landing Gear — Main Landing Gear (MLG) and Doors — Forward Door Linkage Sleeves Missing Greasing Grooves

The Canadian Airworthiness Directive CF-2022-29 addresses an issue with the main landing gear forward door linkage sleeves on De Havilland DHC-8-401 and -402 aircraft, serial numbers 4001, 4003, and subsequent. The directive mandates inspections and corrective actions due to missing greasing grooves on part number 46878-1 sleeves, which could lead to fatigue failure and potential landing gear malfunction. This safety measure aims to prevent asymmetric landing gear configuration and runway excursions.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland DHC-8-401
  • De Havilland DHC-8-402

EASA AD CF-2022-21

Apr 25, 2022

Stabilizers — Horizontal Stabilizer to Vertical Stabilizer Joint — Non-Conforming Saddle Washer (Radius Filler)

Canadian Airworthiness Directive CF-2022-21 addresses a non-conforming saddle washer (radius filler) issue at the horizontal stabilizer to vertical stabilizer joint on De Havilland Aircraft of Canada Limited model DHC-8-401 and -402 aeroplanes, serial numbers 4001 and 4003 through 4633. The directive mandates inspection and replacement of affected parts to ensure structural integrity. This AD aims to prevent potential structural degradation caused by improperly manufactured saddle washers.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland DHC-8-401
  • De Havilland DHC-8-402

EASA AD CF-2022-12

Mar 22, 2022

Landing Gear — Lubrication of Main Landing Gear

Canadian Airworthiness Directive CF-2022-12 mandates repetitive lubrication of the main landing gear (MLG) on De Havilland Aircraft of Canada Limited DHC-8-401 and -402 aeroplanes, serial numbers 4001, 4003, and subsequent. This directive addresses issues with MLG lock actuator assemblies that may fail due to grease degradation over time. The directive ensures continued safe operation by requiring maintenance actions in accordance with De Havilland Service Bulletin 84-32-168.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland DHC-8-401
  • De Havilland DHC-8-402

EASA AD CF-2022-09

Mar 4, 2022

Air Conditioning — Avionics Cooling — Integrated Flight Cabinet Failure Due to High Temperatures

Airworthiness Directive CF-2022-09 is issued by Transport Canada and applies to De Havilland Aircraft of Canada Limited model DHC-8-401 and -402 aeroplanes, serial numbers 4095 through 4633. The directive addresses failures in the Integrated Flight Cabinet (IFC) caused by higher-than-expected operating temperatures affecting avionics cooling. This condition could lead to autopilot pitch trim servo runaway and stall warning system failures, impacting aircraft controllability.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland DHC-8-401
  • De Havilland DHC-8-402

EASA AD CF-2022-02

Feb 1, 2022

Stabilizers — Horizontal Stabilizer Lower Centre Skin Panel — Corrosion Damage

Canadian Airworthiness Directive CF-2022-02 addresses corrosion damage on the horizontal stabilizer lower centre skin panel of De Havilland Aircraft of Canada Limited model DHC-8-401 and -402 aeroplanes, serial numbers 4001 and 4003 through 4549. This directive mandates inspection and corrective actions to ensure structural integrity of the horizontal stabilizer. The directive references specific service bulletins for inspection and repair procedures.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland DHC-8-401
  • De Havilland DHC-8-402

EASA AD CF-2009-29R4

Oct 4, 2021

Nose Landing Gear – Loss of Pivot Pin Retention Bolt

The Canadian Airworthiness Directive CF-2009-29R4 addresses safety concerns on De Havilland Aircraft of Canada Limited DHC-8-401 and -402 aeroplanes, specifically related to the nose landing gear pivot pin retention bolt. This directive mandates modifications and maintenance procedures to prevent loss or damage of the retention bolt, which could lead to loss of nose wheel steering and directional control during take-off or landing. The directive applies to aircraft serial numbers 4001, 4003, and subsequent.

Airworthiness DirectiveSuperseded
  • 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-2021-28

Aug 12, 2021

Landing Gear — Nose Wheel Steering Hydraulic Motor — Potential Jam Due to Wear

Canadian Airworthiness Directive CF-2021-28 addresses a potential jam in the nose wheel steering hydraulic motor due to wear on piston rod shoes in De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes, serial numbers 4001 and 4003 through 4622. The directive mandates re-identification or replacement of affected hydraulic motors to prevent loss of directional control during ground operations. It also prohibits installation of certain older hydraulic motor part numbers on these aircraft models.

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 SIB CASA-2021-06

Apr 16, 2021

Electrical Connector Corrosion

The document titled Electrical Connector Corrosion is a Transport Canada Civil Aviation Safety Alert (CASA 2021-06) addressing corrosion issues on electrical connectors and backshells of De Havilland Canada Limited Dash-8-401 and -402 series aeroplanes. It highlights the occurrence of corrosion in harsh operating environments, particularly in landing gear bays and wing trailing edges, which can affect electrical bonding and shielding integrity. The alert provides information and recommendations to operators and maintainers to mitigate these risks.

Safety Information Bulletin
  • De Havilland Canada DHC-8

EASA AD CF-2021-12

Apr 6, 2021

Fire Protection System — Main Landing Gear Primary Zone Advanced Pneumatic Detector Chafing Damage

Canadian Airworthiness Directive CF-2021-12 addresses fire protection system concerns related to the main landing gear primary zone advanced pneumatic detector chafing damage on De Havilland DHC-8-401 and -402 aircraft, serial numbers 4001 and 4003 through 4614. The directive mandates inspections and repairs to prevent hydraulic leaks and fire detection failures caused by insufficient clearance and chafing between hydraulic tubes and APD sensing lines. This AD ensures continued airworthiness and safety of the affected aircraft models.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland DHC-8-401
  • De Havilland DHC-8-402

EASA AD CF-2021-11

Mar 30, 2021

Pneumatic System — Wing Check Valve Bleed Air Leak - Replacement

The Canadian Airworthiness Directive CF-2021-11 addresses a pneumatic system issue involving bleed air leaks at the wing check valve on De Havilland DHC-8-401 and DHC-8-402 aircraft, serial numbers 4001 and 4003 through 4624. This directive mandates replacement of specific V-band clamps and check valve seals to prevent air leaks that could damage aircraft structure and critical components. It applies to affected aircraft operated under Canadian aviation regulations.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland DHC-8-401
  • De Havilland DHC-8-402

EASA AD CF-2021-08

Mar 16, 2021

Fuel System — Fuel Terminal — High Level Sensor Terminal Screw in Contact with Access Panel

The Canadian Airworthiness Directive CF-2021-08 addresses a fuel system issue on De Havilland Aircraft of Canada Limited model DHC-8-401 and -402 aeroplanes, serial numbers 4001 and 4003 through 4628. It identifies a potential contact between the #2 top high level sensor terminal screw and the #6 outer wing fuel access panel stiffener flange that could cause arcing during lightning strikes. This directive mandates corrective actions to eliminate this interference and prevent ignition risks inside the fuel tank.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland DHC-8-401
  • De Havilland DHC-8-402

EASA AD CF-2020-06R1

Jan 12, 2021

Standard Practices/Structures — Introduction of Barrel Nut Inspections

The Standard Practices/Structures — Introduction of Barrel Nut Inspections is a Canadian Airworthiness Directive CF-2020-06R1 issued by Transport Canada affecting all serial numbers of De Havilland Aircraft of Canada Limited DHC-8-100, DHC-8-200, DHC-8-300, and DHC-8-400 series aeroplanes. This directive mandates inspections of barrel nuts installed at multiple structural locations on these aircraft to detect and address cracking caused by corrosion. The inspections aim to maintain structural integrity and prevent potential loss of control of the aeroplane.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland Aircraft of Canada Limited DHC-8-100
  • De Havilland Aircraft of Canada Limited DHC-8-200
  • De Havilland Aircraft of Canada Limited DHC-8-300
  • De Havilland Aircraft of Canada Limited DHC-8-400

EASA AD CF-2020-43

Oct 22, 2020

Landing Gear — Main Landing Gear Drag Strut — Longitudinal Cracking

Airworthiness Directive CF-2020-43 addresses longitudinal cracking in the main landing gear (MLG) drag strut assemblies, part number 46301-13, installed on De Havilland Aircraft of Canada Limited model DHC-8-400, DHC-8-401, and DHC-8-402 aeroplanes with serial numbers 4001, 4003, and subsequent. The directive mandates inspections and magnetic particle testing to detect cracks that could lead to landing gear failure. It also requires reporting inspection results to the manufacturer.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland Aircraft of Canada DHC-8-400
  • De Havilland Aircraft of Canada DHC-8-401
  • De Havilland Aircraft of Canada DHC-8-402

EASA AD CF-2020-39

Oct 15, 2020

Nacelles/Pylons — Main Landing Gear Side Brace Fitting to A-frame Joint — Fastener Holes Not Cold-worked

Canadian Airworthiness Directive CF-2020-39 addresses an issue with the nacelles/pylons on De Havilland Aircraft of Canada Limited DHC-8-400, -401, and -402 aeroplanes, specifically serial numbers 4081 through 4591. The directive focuses on the main landing gear side brace fitting to the A-frame joint where fastener holes were not cold-worked as required. This condition poses a risk of cracking and potential main landing gear collapse.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland DHC-8-400
  • De Havilland DHC-8-401
  • De Havilland DHC-8-402

EASA AD CF-2020-34

Oct 7, 2020

Flight Controls — Rudder Actuator Bracket — Cracked or Missing Nuts

Canadian Airworthiness Directive CF-2020-34 addresses a safety issue affecting De Havilland Aircraft of Canada Limited DHC-8 series aeroplanes, including models DHC-8-102 through DHC-8-315 and DHC-8-400 series. The directive mandates inspection of the rudder actuator bracket mounting nuts for cracks or missing nuts that could compromise the rudder control system. This AD aims to ensure continued safe flight operations by preventing potential loss of directional control.

Airworthiness Directive
  • De Havilland Canada DHC-8
  • De Havilland Aircraft of Canada Limited DHC-8-102
  • De Havilland Aircraft of Canada Limited DHC-8-103
  • De Havilland Aircraft of Canada Limited DHC-8-106
  • De Havilland Aircraft of Canada Limited DHC-8-201
  • De Havilland Aircraft of Canada Limited DHC-8-202
  • De Havilland Aircraft of Canada Limited DHC-8-203
  • De Havilland Aircraft of Canada Limited DHC-8-301
  • De Havilland Aircraft of Canada Limited DHC-8-311
  • De Havilland Aircraft of Canada Limited DHC-8-315
  • De Havilland Aircraft of Canada Limited DHC-8-400