Rpm Conversion
No failure report names the rpm conversion. 3 FAA approvals let 1 company make a replacement rpm conversion, Rpmcommander LLC 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 rpm conversion and sell it as an approved part for the models named. These are the companies holding such approvals for a rpm conversion:
For these models most: Rockwell International 500 (1), Aero Commander 500 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Rpmcommander LLC | RPM Conversion RJ0326-1, -2 | Modification Part | Lycoming IO-720-B1B | 2014-03-27 | current |
| Rpmcommander LLC | RPM Conversion IO-720-B1B | Modification Part | Rockwell 500S | 2014-03-27 | current |
| Rpmcommander LLC | RPM Conversion IO540 | Modification Part | Aero Commander 500-B, 500-U, 500-S | 2014-03-27 | 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.