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

Mercer Enterprises

Holds 4 approved modifications, most of them for the Douglas DC-6. FAA spelling: Mercer Enterprises.

Approved modifications 4 · newest first

Douglas DC-6 3Douglas DC-3 1
1975-01-04SA2994WE · Deactivation of high blower on CB-16 engines. · DC-6
1973-09-24SA2761WE · Interior arrangement. · DC-6
1960-01-01SA347WE · Aircraft modified for 41 occupants. · DC-3 Series, DC-3 Series
1960-01-01SA1517WE · Interior arrangement for 97 occupants, DME installation, interior emergency lighting installation. · DC-6 Series, DC-6B (Navy R6D-1Z), DC-6

Source: FAA Dynamic Regulatory System (type certificate data sheets, supplemental type certificates, technical standard order authorisations). An organisation's name is as the FAA spelled it on each record; related spellings are separate pages.