The U.S. aircraft register, updated daily
Parts

Roll Up

No failure report names the roll up. 1 FAA approvals let 1 company make a replacement roll up, Midwest Aircraft Prod CO 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 roll up and sell it as an approved part for the models named. These are the companies holding such approvals for a roll up:

MakerPartReplacesFitsGrantedStatus
Midwest Aircraft Prod CORoll-up Door Assembly 1128Modification PartSaab Aircraft AB SF340A1993-08-16current

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.