Audio Buffer
No failure report names the audio buffer. 2 FAA approvals let 2 companies make a replacement audio buffer, Geneva Aviation holding the most (1).
Approved replacement parts 2 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a audio buffer and sell it as an approved part for the models named. These are the companies holding such approvals for a audio buffer:
For these models most: Boeing 747 (1), Airbus Helicopters AS350 AStar (Écureuil), now H125 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Dpi Labs INC | AUDIO BUFFER ISOLATOR MODULE SEE TOP ASSY 51460, REV... BOMSL-1971 | BOMSL-1971 | Boeing 747SP | 2014-03-09 | current |
| Geneva Aviation | Audio Buffer G11691 | Modification Part | Eurocopter France AS350B, BA, B1 | 2004-11-15 | 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.