The U.S. aircraft register, updated daily
Parts

Washer Idx

No failure report names the washer idx. 2 FAA approvals let 1 company make a replacement washer idx, Ram Aircraft Limited Partnership 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 washer idx and sell it as an approved part for the models named. These are the companies holding such approvals for a washer idx:

MakerPartReplacesFitsGrantedStatus
Ram Aircraft Limited PartnershipWasher .51 IDx.25 THK 2628-1TCM P/N 632120Teledyne Continental GTSIO-520-C, D, H2008-12-22current
Ram Aircraft Limited PartnershipWasher .52 IDx.16 THK 2628-3TCM P/N 538989Teledyne Continental O-470-G, GCI, J2008-12-22current

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.