Butler Aviation
Named as the FAA publishes it on its approvals.
Holds 7 approved modifications, most of them for the Douglas C-54. FAA spelling: Butler Aviation.
Approved modifications 7 · newest first
1974-09-20ST512SO · Installation of cargo door and nets. · G-159
1960-01-01SA63EA · General Dynamics rectangular exhaust exit mufflers on aircraft with Hamilton Standard43E60/6895-12 propellers and... · 240 Series
1960-01-01SA187SO · Bar cabinet and 2-place couch. · 1121
SA1-140 · Cockpit heater and air intake and blower mounting. · DC-4, C54-DC Series
SA1-500 · Waste King flight data recorder5424. · 440 Military C-131E, 340
SA1-471 · Weather mapping radar. · 440 Military C-131E, 340
SA1-488 · Various radio and modifications plus rearrangement of control head on pedestal and revised radio electrical circuitry. · 340
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.