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

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

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New ADs and bulletins for Viking Air DHC-6 (Twin Otter), summarized like the ones below, every Monday.

EASA AD CF-2021-42

Dec 7, 2021

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.

Airworthiness Directive
  • Viking Air DHC-6 (Twin Otter)
  • Viking Air DHC-6

EASA AD CF-2020-45R1

Apr 20, 2021

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.

Airworthiness Directive
  • Viking Air DHC-6 (Twin Otter)
  • Viking Air DHC-6

EASA AD CF-2019-02

Jan 10, 2019

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.

Airworthiness Directive
  • Viking Air DHC-6 (Twin Otter)
  • Viking Air DHC-6 Series 1
  • Viking Air DHC-6 Series 100
  • Viking Air DHC-6 Series 110
  • Viking Air DHC-6 Series 200
  • Viking Air DHC-6 Series 210
  • Viking Air DHC-6 Series 300
  • Viking Air DHC-6 Series 310
  • Viking Air DHC-6 Series 320
  • Viking Air DHC-6 Series 400

EASA AD CF-2018-28

Oct 16, 2018

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.

Airworthiness Directive
  • Viking Air DHC-6 (Twin Otter)
  • Viking Air DHC-6

EASA AD CF-1972-06R5

Jun 28, 2018

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.

Airworthiness Directive
  • Viking Air DHC-6 (Twin Otter)
  • Viking Air Ltd. de Havilland DHC-6-100
  • Viking Air Ltd. de Havilland DHC-6-200
  • Viking Air Ltd. de Havilland DHC-6-300
  • Viking Air Ltd. de Havilland DHC-6-400

EASA AD CF-2018-07

Feb 26, 2018

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.

Airworthiness Directive
  • Viking Air DHC-6 (Twin Otter)
  • Viking Air DHC-6-400