Instrument Bus
No failure report names the instrument bus. 1 FAA approvals let 1 company make a replacement instrument bus, Avionic Instruments INC 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 instrument bus and sell it as an approved part for the models named. These are the companies holding such approvals for a instrument bus:
For these models most: Boeing 767 (1), Boeing 747 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Avionic Instruments INC | Instrument Bus Voltage Sensor Unit (IBVSU 1-002-0102-2063 | S281N001-3 | Boeing 747-400 Series, 747-400F Series, (TC A20WE) | 2005-10-13 | current |
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.