The U.S. aircraft register, updated daily
Who holds what · as the FAA records the name

Department of the Navy Naval Air System

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Boeing 707. FAA spelling: Department of the Navy Naval Air System.

Approved modifications 2 · newest first

Boeing 707 2
1991-05-03SA7571SW · Installation of a modified interior. (707-300B S/N 18961 AND 18962) · 707-300B
1990-02-13SA7568SW · Installation of dual Collins FD-109 Flight Directors with dual Central Air Data Computers and misc. avionics modifications. · 707-300B

Source: FAA Dynamic Regulatory System (type certificate data sheets, supplemental type certificates, parts manufacturer approvals, technical standard order authorisations). An organisation's name is as the FAA spelled it on each record; related spellings are separate pages.