Expands Capability, Supports Long-Term Growth For General And Business Aviation TAS Aviation, a leader in Twin Cessna services headquartered in Defiance, Ohio, has announced it has received the Federal Aviation Administration’s (FAA) Part 145 Repair Station Certification. The certification follows nearly three years of focused work by TAS team members in coordination with FAA officials and industry experts. TAS Aviation is recognized for its focus on Cessna 300- and 400-series twin-engine aircraft. For 50 years, the company has worked extensively in the Twin Cessna community and today supports approximately 100 to 150 aircraft annually.