The U.S. aircraft register, updated daily
Parts

Plug Doubler

No failure report names the plug doubler. 1 FAA approvals let 1 company make a replacement plug doubler, Seven Q Seven LTD 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 plug doubler and sell it as an approved part for the models named. These are the companies holding such approvals for a plug doubler:

MakerPartReplacesFitsGrantedStatus
Seven Q Seven LTDPlug Doubler S633-50076-19Modification PartBoeing B707-300C Series2011-04-07current

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.