Main Sub
No failure report names the main sub. 4 FAA approvals let 1 company make a replacement main sub, Niacc-Avitech 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 main sub and sell it as an approved part for the models named. These are the companies holding such approvals for a main sub:
For these models most: Bombardier CL-600 Challenger and CRJ (4).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Niacc-Avitech Technologies | Upper Main Sub-Assembly RH/IB NT18-0004-01 | Modification Part | Bombardier, Inc. CL-600-2C10 CL-600-2D24 | 2012-12-02 | current |
| Niacc-Avitech Technologies | Upper Main Sub-Assembly LH/IB NT18-0002-01 | Modification Part | Bombardier, Inc. CL-600-2C10 CL-600-2D24 | 2012-12-02 | current |
| Niacc-Avitech Technologies | Upper Main Sub-Assembly LH/OB NT18-0001-01 | Modification Part | Bombardier, Inc. CL-600-2C10 CL-600-2D24 | 2012-12-02 | current |
| Niacc-Avitech Technologies | Upper Main Sub-Assembly RH/OB NT18-0003-01 | Modification Part | Bombardier, Inc. CL-600-2C10 CL-600-2D24 | 2012-12-02 | 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.