The U.S. aircraft register, updated daily
Parts

Arch

No failure report names the arch. 1 FAA approvals let 1 company make a replacement arch, Yesteryear Aviation INC 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 arch and sell it as an approved part for the models named. These are the companies holding such approvals for a arch:

For these models most: Boeing IB75 (1), Boeing E75 Stearman Kaydet (1), Boeing D75 (1), Boeing B75 Stearman Kaydet (1), Boeing A75 Stearman Kaydet (1), Boeing 75 (1).

MakerPartReplacesFitsGrantedStatus
Yesteryear Aviation INCArch, Fire Extinguisher Frame Support YA75-237675-2376Boeing A75L3, 75 (Army PT-13), A75 (Army PT-13A2020-01-27current

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.