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

Original Primary Category Aircraft Training School (Topcat)

Named as the FAA publishes it on its approvals.

Holds 1 approved modification, most of them for the Cessna 152. FAA spelling: Original Primary Category Aircraft Training School (TOPCAT).

Approved modifications 1 · newest first

Cessna 152 1Cessna 150 1
2003-03-11SA09643SC · Modification to remove the Standard Airworthiness Certificate and placing them in 'Special Airworthiness... · 150, 152

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.