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

Engineering Modification CO

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Cessna 310. FAA spelling: Engineering Modification Co.

Approved modifications 2 · newest first

Cessna 310 1
1960-01-01SA4-238 · Thompson TF 2800 engine- driven fuel pump installation on Continental O-470-G engine. · 35 Series, 35 Series
1960-01-01SA4-239 · Thompson TF2800 engine-driven fuel pump. · 310 Series

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.