336413: Other Aircraft Parts and Auxiliary Equipment Manufacturing

What this code covers

NAICS 336413 covers aircraft parts and auxiliary equipment other than engines and aircraft fluid power subassemblies, plus prototypes of those parts. The Census examples run from wings, fuselage sections and tail assemblies to ailerons, rudders, stabilizers, landing gear, brakes, propellers, rotors, de-icing equipment and nose cones.

In practice this is where a small shop making machined fittings, bulkheads, brackets, sheet metal skins, welded ducts, cable assemblies and detail parts to an aircraft drawing lands. DLA Aviation, NAVSUP Weapon Systems Support, the Air Force Sustainment Center and Army aviation buyers at Redstone Arsenal buy spares under this code, and the airframe primes buy production details from the same shops.

What federal buyers typically ask for

AS9100 is the expectation, with Nadcap for special processes and a certificate of conformance plus raw material certs on every shipment. First article inspection is routine for a new source or a new revision. The DFARS specialty metals clause applies to steel, titanium and nickel alloy parts and to fasteners.

Flight critical parts carry a source approval requirement. DLA Aviation, the Navy and the Air Force each run their own process, and a source approval request usually needs the drawing package, evidence you have made a similar part, and your inspection plan. Aircraft parts are ITAR controlled under the aircraft category unless the drawing says otherwise. Contracts that carry controlled unclassified information add CMMC.

This is one of the codes where small business set-asides are most common. DLA spares with government-owned data are routinely set aside, and automated DIBBS awards handle the smaller lots. Parts where only the airframe manufacturer holds approval go sole source, and structural assemblies for a production line reach small shops as subcontracts.