DER Types and Specializations
Section 05: Delegation & Roles
Definition
DERs are appointed in specific engineering disciplines corresponding to the technical areas in which they demonstrate expertise. The principal types are: Structures DER (static and fatigue analysis, damage tolerance), Systems and Equipment DER (electrical, hydraulic, flight controls, avionics installations), Powerplant DER (engine installations, fuel systems, fire protection), Flight Analyst DER (performance, handling qualities analysis), Flight Test Pilot DER (flight test evaluations), Acoustics DER (noise certification), and Radio DER (communications and navigation equipment approval). Each type has a defined scope documented in the appointment letter.
Where This Shows Up
A DER's authority is strictly bounded by the appointment letter. A Structures DER cannot approve systems analyses, and a Systems DER cannot sign off on structural substantiation. This specialization ensures that only qualified individuals make findings of compliance in their area of expertise.
Primary Sources
Defines DER types and the qualifications required for each type of appointment.
Related Terms
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