Digital Chronometer
No failure report names the digital chronometer. 3 FAA approvals let 2 companies make a replacement digital chronometer, Ge Aviation Systems LLC (Formerly Smiths Industries LLC) holding the most (2).
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a digital chronometer and sell it as an approved part for the models named. These are the companies holding such approvals for a digital chronometer:
For these models most: Boeing 737 (2), Boeing 727 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Ge Aviation Systems LLC (Formerly Smiths Industries LLC) | Digital Chronometer 30-100-01 | 30-100-01 | Boeing 727-200 Series, 727-200F Series,... | 2008-06-09 | current |
| Ge Aviation Systems LLC (Formerly Smiths Industries LLC) | Digital Chronometer 30-100-07 | 30-100-07 | Boeing 737-200 Series | 2008-06-09 | current |
| Air Systems | Digital Chronometer LED-5 | Modification Part | Miscellaneous Aircraft as listed in the Air... | 1991-05-27 | 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.