Helisas
No failure report names the helisas. 4 FAA approvals let 3 companies make a replacement helisas, North Flight Data System, LLC holding the most (2).
Approved replacement parts 4 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a helisas and sell it as an approved part for the models named. These are the companies holding such approvals for a helisas:
For these models most: Airbus Helicopters EC 130 now H130 (2), Robinson R66 (1), Airbus Helicopters EC-135 now H135 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Metro Aviation INC | HeliSAS(r) / Autopilot System 135M-9100 | Modification Part | Airbus Helicopter... EC135 P1, EC135 P2, EC135 P2+ | 2016-08-23 | current |
| S-Tec Corporation | HeliSAS/Autopilot System ST-953 | Modification Part | Robinson R66 | 2016-03-10 | current |
| North Flight Data System, LLC | HeliSAS 130M-153-SAS-1 and all... | Modification Parts | Eurocopter EC130B4 | 2013-04-08 | current |
| North Flight Data System, LLC | HeliSAS 130M-153-SAS-1 | 130M-153-SAS-1 | Eurocopter EC130B4 | 2013-04-08 | 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.