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

Central Air Services

Holds 5 approved modifications, most of them for the Douglas C-54. FAA spelling: Central Air Services.

Approved modifications 5 · newest first

Douglas C-54 4
1981-03-05SA1621CE · Restricted category tanker conversion. · C54D-DC (Navy R5D-3), C54D-DC (Army C-54D)
1980-05-19SA1587CE · Restricted category tanker conversion · C54D-DC
1978-12-18SA1465CE · Restricted category tanker conversion · C54B-DC
1978-03-21SA1404CE · Restricted category tanker conversion · C54D-DC
1977-06-24SA1334CE · Restricted category tanker conversion · C54D-DC

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.