The U.S. aircraft register, updated daily
Parts

Valve Pres

No failure report names the valve pres. 1 FAA approvals let 1 company make a replacement valve pres, Grimes Aerospace 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 valve pres and sell it as an approved part for the models named. These are the companies holding such approvals for a valve pres:

For these models most: Mcdonnell Douglas DC-10 (1).

MakerPartReplacesFitsGrantedStatus
Grimes Aerospace COValve Pres Reg S.O. 84D33-4McDonnell Douglas 84D33-4McDonnell Douglas DC-10-301992-08-06current

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.