The U.S. aircraft register, updated daily
Parts

Inch Differential

No failure report names the inch differential. 1 FAA approvals let 1 company make a replacement inch differential, Powertronic Systems Florida 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 inch differential and sell it as an approved part for the models named. These are the companies holding such approvals for a inch differential:

For these models most: Bell 430 (1), Bell 230 (1).

MakerPartReplacesFitsGrantedStatus
Powertronic Systems Florida INCAssembly 11.0 inch W.C. Differential Pressure Switch 517D-001-12118265-201Bell Helicopter Textron 230, 4302016-10-04current

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.