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

Portable Rock Production

Named as the FAA publishes it on its approvals.

Holds 1 approved modification, most of them for the Boeing B75 Stearman Kaydet. FAA spelling: Portable Rock Production.

Approved modifications 1 · newest first

Boeing B75 Stearman Kaydet 1
1980-05-19SA941NW · Installation of a Pratt and Whitney R985-AN-5 engine with a Hamilton Standard 2D30/6101A-12 propeller, Servair type... · B75N1 (Navy N2S-3)

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.