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

Pioneer Aero Service

Holds 3 approved modifications, most of them for the Cessna 150. FAA spelling: Pioneer Aero Service.

Approved modifications 3 · newest first

Cessna 150 1
1960-01-01SA725WE · Brake control. · Bolkow Jr.
1960-01-01SA768WE · Fuel pressure gage. · Bolkow Jr.
1960-01-01SA164WE · Fuel filter PFF-100. · 150 Series

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