The U.S. aircraft register, updated daily
Parts

Duplex Coupler

No failure report names the duplex coupler. 1 FAA approvals let 1 company make a replacement duplex coupler, Lumexis Corporation holding the most (1).

Approved replacement parts 1 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a duplex coupler and sell it as an approved part for the models named. These are the companies holding such approvals for a duplex coupler:

For these models most: Boeing 737 (1).

MakerPartReplacesFitsGrantedStatus
Lumexis CorporationDuplex Coupler w/Flange 1938402-1Modification PartBoeing 737-800 Series2010-11-16current

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.