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

Symons Engineering

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Piper PA-24 Comanche. FAA spelling: Symons Engineering.

Approved modifications 2 · newest first

Piper PA-24 Comanche 1Beechcraft F35 1Beechcraft E35 1Beechcraft D35 1Beechcraft C35 1Beechcraft B35 1Beechcraft A35 1Beechcraft 35 Bonanza and Debonair 1
1960-03-25SA4-971 · Installation of 20 gallon auxiliary fuel tank in baggage compartment. · PA-24
1958-08-01SA4-559 · Installation of 20 gallon auxiliary fuel tank. · 35, A35, B35

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.