Flight Controls — Loose Rudder Pedal Torque Tube Quadrant Riveted Connection
- Published
- Effective
- Deadline
- Replaces
- 2020-45
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Viking Air Ltd. DHC-6 series aircraft must inspect the rudder pedal torque tube quadrant assembly within three months of the original AD effective date, 17 November 2020. If looseness or rivet wear is found, repairs or part replacements must be completed before further flight following the instructions in Service Bulletin V6/0067 Revision A or later approved revisions. Compliance with these actions is mandatory to continue legal operation.
Summary
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.
What changed
CF-2020-45R1 revises the applicability of the original AD CF-2020-45 by updating the affected aircraft serial numbers in line with Viking Air Ltd.'s revised Service Bulletin V6/0067 Revision A. It confirms that inspections and repairs performed under the original AD or earlier service bulletin revisions remain compliant and allows the use of later approved service bulletin revisions for compliance.
Why it matters
This directive is critical for aviation professionals because it addresses a safety risk that could lead to loss of rudder control and potentially loss of the aircraft. Operators and maintenance organizations must ensure compliance to detect and rectify loose rivet connections to maintain flight safety and regulatory compliance. It also clarifies acceptable methods of compliance and updates affected aircraft applicability to streamline maintenance efforts.
More for Viking Air DHC-6 (Twin Otter)
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- EASA AD CF-2020-05Wings — Cracking and Corrosion of Aileron Internal StructureMar 17, 2020
- EASA AD CF-2019-02Time Limits / Maintenance Checks — Airworthiness Limitations - ImplementationJan 10, 2019
- EASA AD CF-2018-28Flight Controls — Worn Elevator Cables - InspectionOct 16, 2018
- EASA AD CF-1972-06R5Flight Controls - Damage from Ground GustsJun 28, 2018
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