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

Simpson J B

Named as the FAA publishes it on its approvals.

Holds 1 approved modification, most of them for the Piper PA-14. FAA spelling: Simpson J B.

Approved modifications 1 · newest first

1963-03-13SA196SW · Installation of Hartzell model HC-82XL-6F/7636D-4 propeller, Woodward governor 210080P, Piper 14-733-00 propeller control · PA-14

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.