Spring Uplock
No failure report names the spring uplock. 12 FAA approvals let 5 companies make a replacement spring uplock, Aviation Materials Management INC holding the most (4).
Approved replacement parts 12 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a spring uplock and sell it as an approved part for the models named. These are the companies holding such approvals for a spring uplock:
For these models most: Boeing 737 (11), Boeing 757 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Alliance Aerospace Engineering INC | Spring – Uplock, M.L.G. 10-A6114-3 | 161A6114-3 | The Boeing Company 737-600 Series, 737-700 Series,... | 2026-03-25 | current |
| Alliance Aerospace Engineering INC | Spring – Uplock, M.L.G. 10-A6114-3 | 161A6114-3 | The Boeing Company 737-600 Series, 737-700 Series,... | 2024-11-19 | current |
| Alliance Aerospace Engineering INC | Spring – Uplock, M.L.G. 10-A6114-3 | 161A6114-3 | The Boeing Company 737-600 Series, 737-700 Series,... | 2024-11-19 | current |
| Aviation Materials Management, INC | Spring-Uplock 161A6114-3 | 161A6114-3 | Boeing 737-600 Series, 737-700 Series,... | 2015-02-12 | current |
| Aviation Materials Management, INC | Spring-Uplock 161A6114-3 | 161A6114-3 | Boeing 737-600 Series, 737-700 Series,... | 2015-02-12 | current |
| Aviation Materials Management, INC. | Spring-Uplock 161A6114-3 | 161A6114-3 | Boeing 737-600 Series, 737-700 Series,... | 2014-09-04 | current |
| Aviation Materials Management, INC. | Spring-Uplock 161A6114-3 | 161A6114-3 | Boeing 737-600 Series, 737-700 Series,... | 2014-09-04 | current |
| Aviation Materials Management INC | Spring-Uplock 161A6114-3 | 161A6114-3 | Boeing 737-600 Series, 737-700 Series,... | 2013-03-24 | current |
| Aviation Materials Management INC | Spring-Uplock 161A6114-3 | 161A6114-3 | Boeing 737-600 Series, 737-700 Series,... | 2013-02-26 | current |
| Aviation Materials Management INC | Spring-Uplock 161A6114-3 | 161A6114-3 | Boeing 737-600 Series, 737-700 Series,... | 2010-10-05 | current |
| Aviation Materials Management INC | Spring-Uplock 161A6114-3 | 161A6114-3 | Boeing 737-600 Series, 737-700 Series,... | 2010-08-08 | current |
| Gemini Engineering | SPRING-UPLOCK 161N5021-3 | 161N5021-3 | Boeing 757-200 Series, 757-200CB Series,... | 2009-06-03 | 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.