Busing
No failure report names the busing. 5 FAA approvals let 4 companies make a replacement busing, Aar Tempco INC holding the most (2).
Approved replacement parts 5 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a busing and sell it as an approved part for the models named. These are the companies holding such approvals for a busing:
For these models most: Embraer EMB-120 (2), Boeing 747 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Continental Aerospace Technologies INC | Busing, Valve Rocker Shaft AE57580 (and ovesizes up to .015) | 57580 | Pratt & Whitney Twin Wasp R1830-43, 43A, 49 | 2020-01-06 | current |
| Continental Motors INC | Busing, Valve Rocker Shaft AE57580 (and ovesizes up to .015) | 57580 | Pratt & Whitney Twin Wasp R1830-43, 43A, 49 | 2017-01-08 | current |
| Kamatics CORP | Busing KJB492009V | KJB492009V | Boeing 747-400 Series | 2010-02-25 | current |
| Aar Tempco INC | Busing TBR20686/001V | Eram 20686 | Embraer Empresa EMB-120 | 1997-03-04 | current |
| Aar Tempco INC | Busing TBR20164/001V | Eram 20164 | Embraer Empresa EMB-120 | 1997-03-04 | 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.