FAA DER Engineering Designations

Structural DERs may approve, within the limits of their appointment, the followingitems that comply with pertinent regulation(s):

(1) Engineering reports.
(2) Drawings.
(3) Test witnessing and reports (with prior FAA approval).
(4) Material and process specifications used in structural applications.
(5) Other data relating to structural considerations.

Powerplant DERs may approve, within the limits of their appointment, the following items that comply with pertinent regulation(s):

(1) Engineering reports.
(2) Drawings.
(3) Test witnessing and reports (with prior FAA approval).
(4) Other data relating to powerplant installations, including all systems and equipment necessary for the proper operation of the powerplant.

Systems and equipment DERs may approve, within the limits of their appointment, the following items that comply with pertinent regulation(s):

(1) Engineering reports.
(2) Drawings.
(3) Test witnessing and reports (with prior FAA approval).
(4) Other data relating to aircraft systems and equipment design not covered by the structural or powerplant DER.

Radio DERs may approve, within the limits of their appointment, the following items that comply with pertinent regulation(s):

(1) Engineering reports.
(2) Drawings.
(3) Other data relating to the design and operating characteristics of radio equipment being manufactured and/or modified.

Engine DERs may approve, within the limits of their appointment, the following items that comply with pertinent regulation(s):

(1) Engineering reports.
(2) Drawings.
(3) Test witnessing and reports (with prior FAA approval).
(4) Other data relating to durability, materials, and processes employed in engine design, operation, and maintenance.

Propeller DERs may approve, within the limits of their appointment, the following items that comply with pertinent regulation(s):

(1) Engineering reports.
(2) Drawings.
(3) Test witnessing and reports (with prior FAA approval).
(4) Other data relating to propeller blade and hub design, pitch control, propeller governing, and maintenance, provided these items comply with the pertinent regulation(s).

Flight analyst DERs may approve, within the limits of their appointment, the following items that comply with pertinent regulation(s):

(1) Aircraft performance flight-test data.
(2) Aircraft quantitative operating data.
(3) Flight characteristic data.

FTP DERs may conduct and approve, within the limits of their appointment, flight tests of new or modified aircraft.

Acoustical DERs, when delegated on a case-by-case basis, may witness and approve, within the limits of their appointment, the following items that comply with pertinentregulation(s):

(1) Noise certification tests conducted in accordance with an FAA-approved test plan.
(2) Noise data.
(3) Noise analyses.
(4) Test results that were measured and evaluated as prescribed in FAR Part 36, Noise Standards: Aircraft Type and Airworthiness Certification, subparts A through J, or by anequivalent procedure previously approved by the FAA Office of Environment and Energy(AEE-1).

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