Electronic Chronometer
No failure report names the electronic chronometer. 3 FAA approvals let 2 companies make a replacement electronic chronometer, Smiths Industries/Aerospace 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 electronic chronometer and sell it as an approved part for the models named. These are the companies holding such approvals for a electronic chronometer:
For these models most: Mcdonnell Douglas DC-9 (1), Mcdonnell Douglas Aircraft Co MD-88 (1), Boeing 747 (1), Boeing 737 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Smiths Industries/Aerospace | Electronic Chronometer 2610-07-1 | Boeing 60B00303-105 | Boeing 737-300, -400, -500 Series | 1998-04-19 | current |
| Smiths Industries/Aerospace | Electronic Chronometer 2600-05-1 | McDonnell Douglas DC-9-81, -82, -83 | 1992-03-24 | current | |
| Simmonds Precision Products INC Goodrich Sensors and Integrated Systems - Vt | Electronic Chronometer 2610-10-1 | Boeing 60B00303-108 | Boeing 747-300, -400 series | 1991-03-11 | 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.