The U.S. aircraft register, updated daily
Parts

Angle Seat

No failure report names the angle seat. 2 FAA approvals let 2 companies make a replacement angle seat, Volant holding the most (1).

Approved replacement parts 2 parts manufacturer approvals

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

For these models most: Boeing 737 (2).

MakerPartReplacesFitsGrantedStatus
VolantAngle -Seat Track 146A5360-6146A5360-6Boeing 737-600 Series, 737-700 Series,...2009-04-14current
International Aero InteriorsAngle -Seat Track 146A5360-6146A5360-6Boeing 737-600, 737-700, 737-8002008-12-28current

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.