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

US Dept of Interior

Named as the FAA publishes it on its approvals.

Holds 5 approved modifications, most of them for the Pilatus PC-6. FAA spelling: US Dept of Interior.

Approved modifications 5 · newest first

1997-05-28SA00162SE · Installation of telemetry antennas. · 172, 172A, 172B
1993-07-20SA5959NM · Installation of Garrett TPE331-1-151K engine. · PC-6/C-H2
1975-04-07SA547AL · Modification of elevator and horizontal stabilizer tips. · DHC-2 Series
1960-01-01SA245AL · Relocation of wing tip fuel control valve. · DHC-2 Series
1960-01-01SH160AL · Airborne control survey system. · UH-12 Series, UH-12 Series, UH-12L4

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.