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

Cs Engineering

Named as the FAA publishes it on its approvals.

Holds 3 approved modifications, most of them for the Bell 212. FAA spelling: CS Engineering.

Approved modifications 3 · newest first

1974-10-16SH171WE · Installation of A500 battery temperature monitor systems. · 212
1974-10-16SH164WE · Installation of A500 battery temperature monitor system. · 206B-1, 206A, 206B
1974-10-16SH172WE · Installation of A500 battery temperature monitor systems. · 204B, 205A-1, 205A

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.