The U.S. aircraft register, updated daily
Parts

Optional Ss

No failure report names the optional ss. 1 FAA approvals let 1 company make a replacement optional ss, Lake Vue Aeronautics 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 optional ss and sell it as an approved part for the models named. These are the companies holding such approvals for a optional ss:

For these models most: Cessna 182 Skylane (1), Cessna 170 (1).

MakerPartReplacesFitsGrantedStatus
Lake Vue AeronauticsOptional Front SS Tube Mounts. 1013Modification PartCessna 170. 170A. 170B. 172. 172A, B, C2008-02-10current

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.