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

Great Lakes Airlines INC

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Douglas DC-6. FAA spelling: Great Lakes Airlines Inc.

Approved modifications 2 · newest first

Douglas DC-6 1
1960-01-01SA4-543 · 112-passenger seating arrangement. · DC-6 Series, DC-6B (Navy R6D-1Z), DC-6
1960-01-01SA4-1500 · Interior modification for 98 passengers, maximum occupants including crew. · 749-79 (VC-121B), 749-79 (C-121A), 649A-79

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.