Valve Seq
No failure report names the valve seq. 3 FAA approvals let 2 companies make a replacement valve seq, Shimadzu Precision Instruments, INC. 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 valve seq and sell it as an approved part for the models named. These are the companies holding such approvals for a valve seq:
For these models most: Boeing 767 (2), Boeing 747 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Shimadzu Precision Instruments, INC. | Valve Assy-Seq., Main Gear Operated 99C58800-101 | S273T140-1 | The Boeing Company 767-400ER | 2023-11-27 | current |
| Shimadzu Precision Instruments, INC. | Valve Assy-Seq., Main Gear Operated 99C58800-101 | S273T140-1 | Boeing 767-400ER | 2015-05-14 | current |
| Sargent Aerospace | Valve Seq 4333EA, 4334EA-3 | Boeing 60-00252-1, 60-00252-3 | Boeing 747 | 1991-06-05 | 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.