Master Switch
16 failure reports named the master switch in the last ten years, 102 since 1995, most often on the Airbus A320; the condition most often found was "faulted". 3 FAA approvals let 2 companies make a replacement master switch, Korry Electronics CO holding the most (2).
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1995 | 1 |
| 1998 | 1 |
| 1999 | 1 |
| 2000 | 1 |
| 2001 | 11 |
| 2002 | 9 |
| 2003 | 11 |
| 2004 | 8 |
| 2005 | 2 |
| 2006 | 3 |
| 2007 | 4 |
| 2008 | 1 |
| 2009 | 17 |
| 2010 | 4 |
| 2011 | 4 |
| 2012 | 4 |
| 2013 | 1 |
| 2014 | 3 |
| 2016 | 1 |
| 2017 | 2 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 1 |
| 2024 | 4 |
| 2025 | 1 |
Which system the reports file it under last ten years
Reports by system, as a table
| reports | |
|---|---|
| Electrical power | 6 |
| Engine | 6 |
| Instruments and avionics | 3 |
| Fuel system | 1 |
Models most often reporting it last ten years
How it failed the condition found, last ten years
Conditions found, as a table
| reports | |
|---|---|
| faulted | 4 |
| defective | 3 |
| odor | 2 |
| burned | 1 |
| dirty | 1 |
| failed | 1 |
| faulty | 1 |
| inoperative | 1 |
| malfunctioned | 1 |
| unreliable | 1 |
Engines most often reporting it
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a master switch and sell it as an approved part for the models named. These are the companies holding such approvals for a master switch:
For these models most: Sikorsky S-76 (2), Piper PA-32 Cherokee Six, Lance and Saratoga (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Korry Electronics CO | Master Switch Panel Assy/Instl 76450-76003-048 | 76450-76003-048 | Sikorsky S-76D | 2016-04-24 | current |
| Korry Electronics CO | Master Switch Panel Assy/Instl 76450-76003-041 | 76450-76003-041 | Sikorsky S-76D | 2016-04-24 | current |
| Plane Parts Company | Master Switch Panel Cover 01-032409-00 | 69359-07, 69359-08, 69359-09, 69359-10,... | Piper PA-32-260, PA-32-300, PA-32-301 | 2003-02-10 | 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.