Wels Control
No failure report names the wels control. 4 FAA approvals let 1 company make a replacement wels control, Securaplane Technologies holding the most (4).
Approved replacement parts 4 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a wels control and sell it as an approved part for the models named. These are the companies holding such approvals for a wels control:
For these models most: Boeing 787 Dreamliner (4).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Securaplane Technologies | WELS Control Unit 100-2601-02 | 100-2601-02 | Boeing 787-9, 787-10 | 2020-03-16 | current |
| Securaplane Technologies | WELS Control Unit 100-2601-03 | 100-2601-03 | Boeing 787-9, 787-10 | 2020-03-16 | current |
| Securaplane Technologies | WELS Control Unit 100-2601-03 | 100-2601-03 | Boeing 787-8 | 2019-06-16 | current |
| Securaplane Technologies | WELS Control Unit 100-2601-02 | 100-2601-02 | Boeing 787-8 | 2013-06-16 | 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.