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EASA Regulations for Viking Air DHC-6 (Twin Otter)

7 airworthiness directives and regulations affecting Viking Air DHC-6 (Twin Otter).

EASA AD CF-2021-42

Engine Controls — Binding of Fuel Control Unit Push Rod End Bearings

Canadian Airworthiness Directive CF-2021-42 addresses the issue of binding in the fuel control unit (FCU) push rod end bearings on Viking Air Ltd. DHC-6 series 1 through series 400 aircraft, specifically those with lower FCU push rod assemblies part numbers C6CE1398-7, C6CE1398-3 with P/N VSC30-3A rod end bearings, or FAA PMA equivalents. The directive mandates inspections, functional checks, lubrication, and replacement with redesigned parts to prevent engine power control issues. This AD aims to ensure continued safe operation of affected aircraft by mitigating the risk of engine power reduction failure.

Dec 7, 2021
Airworthiness DirectiveMaintenanceSafety MgmtViking Air DHC-6 (Twin Otter)Viking Air DHC-6

EASA AD CF-2020-45R1

Flight Controls — Loose Rudder Pedal Torque Tube Quadrant Riveted Connection

The Canadian Airworthiness Directive CF-2020-45R1 addresses a flight control issue involving loose riveted connections in the rudder pedal torque tube quadrant assembly on Viking Air Ltd. DHC-6 series 1, 100, 110, 200, 210, 300, 310, 320, and 400 aircraft with serial numbers 001 through 987. This directive mandates inspections and corrective actions to ensure the integrity of the rudder control system and prevent potential loss of rudder control.

Apr 20, 2021
Airworthiness DirectiveMaintenanceSafety MgmtViking Air DHC-6 (Twin Otter)Viking Air DHC-6

EASA AD CF-2020-05

Wings — Cracking and Corrosion of Aileron Internal Structure

The Canadian Airworthiness Directive CF-2020-05 addresses cracking and corrosion issues in the aileron internal structure of Viking Air Ltd. DHC-6 series aircraft, including all series from 1 through 400. This directive mandates inspections and corrective actions to ensure the structural integrity of the ailerons on these aircraft models.

Mar 17, 2020
Airworthiness DirectiveMaintenanceSafety MgmtViking Air DHC-6 (Twin Otter)Viking Air DHC-6

EASA AD CF-2019-02

Time Limits / Maintenance Checks — Airworthiness Limitations - Implementation

Airworthiness Directive CF-2019-02 is issued by Transport Canada and applies to Viking Air Ltd. DHC-6 series 1, 100, 110, 200, 210, 300, 310, 320, and 400 aeroplanes. It mandates compliance with the airworthiness limitations specified in Viking Air Ltd.'s Airframe Airworthiness Limitations Manual, Product Support Manual 1-6-11 Revision 9, which includes updated maintenance tasks and life limits for various airframe components.

Jan 10, 2019
Airworthiness DirectiveMaintenanceSafety MgmtViking Air DHC-6 (Twin Otter)Viking Air DHC-6 Series 1Viking Air DHC-6 Series 100Viking Air DHC-6 Series 110Viking Air DHC-6 Series 200Viking Air DHC-6 Series 210Viking Air DHC-6 Series 300Viking Air DHC-6 Series 310Viking Air DHC-6 Series 320Viking Air DHC-6 Series 400

EASA AD CF-2018-28

Flight Controls — Worn Elevator Cables - Inspection

Canadian Airworthiness Directive CF-2018-28 addresses worn elevator cables on Viking Air Ltd. DHC-6 series aeroplanes, including models -1, -100, -110, -200, -210, -300, -310, -320, and -400. The directive mandates inspections for excessive wear at the STA 270.3 pulley location to prevent cable failure and potential loss of aircraft control. It applies to all serial numbers of the affected aircraft.

Oct 16, 2018
Airworthiness DirectiveMaintenanceSafety MgmtViking Air DHC-6 (Twin Otter)Viking Air DHC-6

EASA AD CF-1972-06R5

Flight Controls - Damage from Ground Gusts

Canadian Airworthiness Directive CF-1972-06R5 addresses flight control damage caused by ground gusts on Viking Air Ltd. de Havilland DHC-6 series aeroplanes, including models DHC-6-100, -200, -300, and DHC-6-400. The directive mandates inspections and corrective actions for control columns, elevator/rudder pulley brackets, and elevator quadrants to prevent potential loss of aircraft control due to structural damage.

Jun 28, 2018
Airworthiness DirectiveMaintenanceSafety MgmtViking Air DHC-6 (Twin Otter)Viking Air Ltd. de Havilland DHC-6-100Viking Air Ltd. de Havilland DHC-6-200Viking Air Ltd. de Havilland DHC-6-300Viking Air Ltd. de Havilland DHC-6-400

EASA AD CF-2018-07

Fuel System — Corrosion of fuel system components

Canadian Airworthiness Directive CF-2018-07 addresses corrosion issues in the fuel system components of Viking Air Ltd. DHC-6-400 aircraft, serial numbers 845 to 957, specifically those operating on floats. The directive mandates inspections and modifications to prevent fuel leaks, electrical arcing, and fuel system malfunctions caused by corrosion in the fuel gallery. It provides detailed corrective actions to ensure continued airworthiness and safety.

Feb 26, 2018
Airworthiness DirectiveMaintenanceSafety MgmtViking Air DHC-6 (Twin Otter)Viking Air DHC-6-400