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

Overseas Aircraft Support INC.

Holds 1 type certificate (5 models). FAA spelling: Overseas Aircraft Support Inc..

Type certificates 1

H7SOAircraft · TH-1L, UH-1B, UH-1L, UH-1H, UH-1E

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.