The U.S. aircraft register, updated daily
Parts

Fuselage Strength

No failure report names the fuselage strength. 2 FAA approvals let 1 company make a replacement fuselage strength, Multisciences INC holding the most (2).

Approved replacement parts 2 parts manufacturer approvals

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

MakerPartReplacesFitsGrantedStatus
Multisciences INCFuselage Strength Upgrade MI-069-1001AAI069-001Viking Air Limited (Otter) DHC-32021-05-14current
Multisciences INCFuselage Strength UpgradeInstallation Fuselage Fairings... MI-2002020020Viking Air Limited (Otter) DHC-32021-05-14current

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.