The U.S. aircraft register, updated daily
Parts

Systems Air

No failure report names the systems air. 3 FAA approvals let 1 company make a replacement systems air, New Systems holding the most (3).

Approved replacement parts 3 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a systems air and sell it as an approved part for the models named. These are the companies holding such approvals for a systems air:

For these models most: Embraer EMB-120 (1), Beechcraft 1900 Airliner (1).

MakerPartReplacesFitsGrantedStatus
New SystemsNew Systems Air Call NS20004-1-Raytheon 1900, 1900C, 1900D1997-02-24current
New SystemsNew Systems Air Call NS20004-1-Embraer Empresa EMB-120, EMB-120ER, EMB-120RT1997-02-24current
New SystemsNew Systems Air Call NS20004-1-Jetstream 3101, Series 2001997-02-24current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.