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

Hillsboro Aviation

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Piper PA-22 Tri-Pacer and Colt. FAA spelling: Hillsboro Aviation.

Approved modifications 2 · newest first

2003-04-10SA01203SE · Installation of the Bendix/King KMD 550/850 Multi-Function Display w/Options Installed and Maintained · 200, 200C, 200CT
1960-01-01SA461WE · Removal of right-hand door for parachute jumping and aerial photography operations. · PA-22 Series

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.