Thunder Bay Aviation

About Thunder Bay Aviation Ltd.

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Our mission is to provide the highest quality parts and services to ensure our customers satisfaction for all their aviation needs.


We are a Transport Canada Approved AMO with Certificates of approval in:

  • Manufacture and Certification of Aeronautical Products
  • Maintenance of Aeronautical Products with ratings in:
    • Aircraft (De Havilland DHC-6, DHC-3, DHC-2 All non-specialized work)
    • Structures (Sheet Metal & Tubular)
    • Arc Welding
  • Distribution of Aeronautical Products
  • EASA Part-145 Maintenance

We also have various technical capabilities both in house and through close subcontractor relationships in disciplines such as NDT, machining and plating services.


Thunder Bay Aviation Ltd. was formed as an incorporated company in March of 1987. The objective of our Company at startup was to provide overhaul and repair services to the many aircraft operators in North Western Ontario for their varied fleet of aircraft. Our focus shifted to the De Havilland DHC-6 Twin Otter aircraft and in June of 1989 we began to acquire surplus parts for the Twin Otter. In 1996 we acquired our Manufacturing Approval. To date we have STC, PDA and PMA’s for over 300 parts, ground equipment and miscellaneous equipment for the DHC-6 Twin Otter, DHC-3 Otter and DHC-2 Beaver aircraft.  In addition we now stock a large variety of replacement parts for the Twin Otter, with over 500 line items on our shelves.


In June of 2015 Sunshine Airspares, Inc. acquired Thunder Bay Aviation Ltd. With the extensive inventory, capabilities and expertise of our two companies and staff, we are able to greater support our customers needs.

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