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

Jet Aviation Engineering Services

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the British Aerospace BAE 125. FAA spelling: Jet Aviation Engineering Services.

Approved modifications 2 · newest first

British Aerospace BAE 125 1Boeing 777 1
2010-04-27ST10975SC · Installation of a business class upgrade · 777-200 Series
2006-06-22ST10549SC · Incorporation FAA Form 337 Alterations under a One-Only STC to meet Civil Aviation Authority (CAA) export requirements · BAe.125 Series 1000A

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.