Type Vhf
No failure report names the type vhf. 3 FAA approvals let 1 company make a replacement type vhf, Sigma Tek INC holding the most (3).
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a type vhf and sell it as an approved part for the models named. These are the companies holding such approvals for a type vhf:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Sigma Tek INC | Type 1U454 VHF/NAV Frequency Control 1U454-001 | British Aerospace 1U454-001 | BAE Systems Operations) Limited (146-RJ Series | 1996-08-04 | current |
| Sigma Tek INC | Type 1U453 VHF COM Frequency Preselect 1U453-002 | British Aerospace 1U453-002 | BAE Systems Operations) Limited (146-RJ Series | 1996-08-04 | current |
| Sigma Tek INC | Type 1U453 VHF COM Frequency Preselect 1U453-001 | British Aerospace 1U453-001 | BAE Systems Operations) Limited (146-RJ Series | 1996-08-04 | 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.