The U.S. aircraft register, updated daily
Parts

Seat Tube

No failure report names the seat tube. 3 FAA approvals let 2 companies make a replacement seat tube, Avox Systems INC (Formerly Scott Aviation) 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 seat tube and sell it as an approved part for the models named. These are the companies holding such approvals for a seat tube:

For these models most: Israel Aircraft Industries GALAXY (1).

MakerPartReplacesFitsGrantedStatus
Avox Systems INC (Formerly Scott Aviation)Seat & Tube Assembly 803211-234AS7510719-005Gulfstream Aerospace LP G2802015-02-11current
Scott Aviation (Now Avox Systems, INC.)Seat & Tube Assembly 803211-134AS7510719-001Gulfstream Galaxy1999-02-22current
Avox Systems INC (Formerly Scott Aviation)Seat & Tube Assembly 803211-48, Dwg. No. ...803211-48CPAC Model 114B (S/N 14541 & Subsequent),...1996-01-16current

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.