The U.S. aircraft register, updated daily
Parts

Trendcheck

No failure report names the trendcheck. 1 FAA approvals let 1 company make a replacement trendcheck, Pratt & Whitney Engine Services INC (Formerly Altair) 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 trendcheck and sell it as an approved part for the models named. These are the companies holding such approvals for a trendcheck:

MakerPartReplacesFitsGrantedStatus
Pratt & Whitney Engine Services INC (Formerly Altair)TrendCheck / TrendCheck Plus Monitoring Systems TREND-K-010-1TREND-K-010-1Pratt & Whitney PT6A-6, PT6A-6A, PT6A-6B2007-10-30current

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.