Cascade has extensive experience coordinating projects with the FAA. We can provide complete Designated Engineering Representative (DER) coverage in most disciplines such as Administrative DER, Structural DER, Electrical/Avionics DER, Flammability DER, Passenger Configurations DER, Systems DER, Manufacturing DAR, and Designated Manufacturing Inspection Representative (DMIR) to support your projects in pursuit of FAA Authoritative Approvals resulting in the issuance of Supplemental Type Certificates (STCs).