Downsview Airport (YZD)

Downsview Airport (YZD/CYZD) permanently closed April 2024 following 95 years as Canada's aerospace manufacturing heartland where de Havilland opened the airfield in 1929 on 70 acres of farmland, revolutionizing Canadian aviation through iconic aircraft including Beaver, Twin Otter, and Dash 8 before Bombardier's 1992 acquisition transformed the site into global jet manufacturing center producing Q400 turboprops and assembling Global Express business jets until March 23, 2024, when the final Global 7500 departed marking the end of Toronto's aerospace manufacturing era. Located in North York where wartime expansion as RCAF Station Downsview supported Allied aircraft production during WWII before becoming CFB Toronto until 1996, the 370-acre site now undergoes $22 billion transformation by Northcrest Developments creating North America's largest urban community project featuring 28 million square feet residential space, 7 million square feet commercial property, and 74 acres of parks by 2054 with net-zero carbon targets by 2040.

Historic aerospace infrastructure that never supported commercial passenger service required prior Bombardier Emergency Services permission for all visiting aircraft, featuring twelve hangars in the southwest corner where Dash 8 assembly lines operated alongside Global Express final assembly following 1993 program launch, establishing Downsview as Bombardier's primary Q400 manufacturing site serving Air Canada Express and WestJet Encore fleets. The facility's closure followed 2018 sale to Public Sector Pension Investment Board subsidiary Northcrest, with Bombardier relocating to new 770,000-square-foot Pearson Airport facility opened May 1, 2024, dedicated to Global 7500 and 6500 private jet manufacturing.

Operational legacy encompasses testing grounds for Canada's most significant aircraft where de Havilland's DHC-2 Beaver first flew August 16, 1947, revolutionizing bush flying worldwide, followed by DHC-6 Twin Otter establishing STOL transport standards, and Dash 8 becoming world's best-selling turboprop through Downsview production lines that assembled over 1,000 aircraft before closure. The site witnessed aerospace milestones including Avro Canada CF-105 Arrow component testing during Canada's supersonic fighter program and Global Express development establishing Bombardier's business jet leadership through Downsview flight test operations.

Strategic transformation from aerospace heritage to urban development preserves YZD identity through Northcrest's August 17, 2024 rebranding honoring aviation legacy while creating sustainable community accommodating 55,000 residents and 23,000 jobs, demonstrating successful industrial site conversion where nearly century-long aerospace manufacturing tradition yields to contemporary urban needs. The closure marks Canada's aerospace industry consolidation at Pearson while Downsview's transformation represents Toronto's largest development opportunity, converting former test flights and assembly halls into residential neighborhoods preserving aerospace memory through YZD designation maintaining connection to aviation heritage that shaped Canadian aerospace leadership from de Havilland's pioneering bush planes through Bombardier's global jet revolution.