The U.S. aircraft register, updated daily
Parts

Three Way

No failure report names the three way. 3 FAA approvals let 2 companies make a replacement three way, Tactair Fluid Controls 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 three way and sell it as an approved part for the models named. These are the companies holding such approvals for a three way:

For these models most: Embraer EMB-120 (2), Learjet 31 (1).

MakerPartReplacesFitsGrantedStatus
Eaton Aerospace Sterer EngineeringThree way Valve Alcohol Tank 56360-16608258-2Learjet Inc. 312024-08-23current
Tactair Fluid Controls INCThree-Way Solenoid Valve 6005-Embraer Empresa EMB-120 T.C.D.S. A31S01989-02-09current
Tactair Fluid Controls INCThree-Way Solenoid Valve 6002-Embraer Empresa EMB-120 T.C.D.S. A31S01989-02-09current

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.