The U.S. aircraft register, updated daily
Parts

Altitude Adapter

No failure report names the altitude adapter. 1 FAA approvals let 1 company make a replacement altitude adapter, Skylight Avionics Company holding the most (1).

Approved replacement parts 1 parts manufacturer approvals

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

For these models most: Raytheon Corporate Jets Inc BAE 125 (1).

MakerPartReplacesFitsGrantedStatus
Skylight Avionics CompanyAltitude Adapter, Model ALT-501 550-3000Arkansas Aerospace, Inc. 550-3000Raytheon BAe 125-800A1997-06-22current

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.