The U.S. aircraft register, updated daily
Parts

Amplifier Tray

No failure report names the amplifier tray. 4 FAA approvals let 2 companies make a replacement amplifier tray, Sextant In-Flight Systems holding the most (2).

Approved replacement parts 4 parts manufacturer approvals

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

For these models most: Boeing 727 (2), Airbus A300 (2).

MakerPartReplacesFitsGrantedStatus
B/E Aerospace INC, Avionics DivisionAmplifier Tray 169315-00Airbus 169315-00Airbus A300-B2-1A, -B2-1C -B2-203, -B2K-3C1999-05-13current
B/E Aerospace INC, Avionics DivisionAmplifier Tray/Connector 170329-01United Airlines 170329-01Boeing 727-2221999-05-13current
Sextant In-Flight SystemsAmplifier Tray/Connector 170329-01United Airlines 170329-01Boeing 727-2221999-05-13current
Sextant In-Flight SystemsAmplifier Tray 169315-00Airbus 169315-00Airbus A300-B2-1A, -B2-1C, -B2-2031999-05-13current

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.