Thomas W. Deiters Engineering - FAA Designated Engineering Representative (DER)

Thomas W. Deiters Engineering, Inc.

Thomas W. Deiters Engineering offers professional aerospace structural engineering support services. We provide engineering support for any size and type project and/or maintenance and/or modification issue, leveraging various qualifications including Federal Aviation Administration (FAA) Designated Engineering Representative (DER) credentials outlined in the derdirectory and 14 CFR authorities. We serve individual aircraft owners and  small to mid-sized operators and repair stations. We can perform consulting services for clients who do not have engineering support staff, and can also coordinate our efforts with clients' personnel.

Thomas W. Deiters Engineering was responsible for the approval of the structural development, design, and substantiation of the Aeromedical Biological Containment System (ABCS) for the Centers for Disease Control and Prevention (CDC), deployed in endeavors to contain the Ebola virus.


Thomas W. Deiters Engineering frequently provides static, fatigue, design construction, and damage tolerance services in the following categories, though the company's expertise spans beyond these typical functions:

  • Services to ensure compliance with:
    • 14 CFR Part 23, Airworthiness Standards: Normal, Utility, Acrobatic and Commuter Category Airplanes
    • 14 CFR Part 25, Airworthiness Standards: Transport Category Airplanes
    • 14 CFR Part 26, Continued Airworthiness and Safety Improvement
  • Preparation of substantiation reports and drawings
  • Preparation of FAA Form 8110-3, Statement of Compliance with Airworthiness Standards
  • Preparation, development, and substantiation of type design data for FAA Airworthiness Directives (AD) Alternate Method of Compliance (AMOC), for FAA Amended Type Certificates and Supplemental Type Certificates, and for special one-off projects
  • Support for changes in FAA Airworthiness Certificates
  • Static structural strength/stress analysis - strength substantiation
  • Damage tolerance assessment and/or analysis - structural or mechanical life prediction
  • Preparation of instructions on and provision of support for continuing airworthiness
  • Crack growth and fatigue analysis, and fracture research
  • Repair substantiation - evaluation, design and analysis
  • External and internal loads development
  • Mission spectra development
  • Proof load determination
  • Structural integrity and structural adequacy evaluations
  • Aircraft Structural Integrity Program (ASIP) projects
  • Failure analysis 
  • Cost/benefit analysis, man-hour estimates, and similar cost projections
  • Aircraft Battle Damage Assessment Repairs/Reports (ABDR)

   info@twdeng.com            (770) 386 - 9419